In this homework, we talk to the global domain name system to resolve domain names into IP addresses and reverse. Some good domain names to try, which you definitely will be tested on. Additional domains may be added if we find something interesting in the week.
To get started, check out the hw4 template from
public/hw4
this code already does most of the DNS querying and parsing for you. Your responsibility is to modify the hw4 to work as follows:
The file root-servers.txt contains a list of DNS root servers. Your application must use this file to find a working root server to use. You can assume it will always be called root-servers.txt, and exist in the current working directory. If a server does not respond, it must move on to the next server. The parameters and output of the program are illustrated below.
You are obviously not allowed to use gethostbyname or getaddrinfo for this homework, nor are you allowed to run any executables such as “host” or “nslookup” from inside your program.
Relevant DNS records you need to check are A, NS, CNAME and PTR. You need to find out how to recursively follow these DNS records to get your answer. PTR records help with reverse lookups.
To time out on a recv() call (in case you get no answer), use setsockopt() with the SO_RECVTIMEO option: http://linux.die.net/man/7/socket
Alternatively, you can use alarm(), and set up a handler for SIGALRM. “man alarm()” and “man signal” will help you set that up. Or try the newer sigitimer().
Either way, look for errno==EINTR (for alarm) or errno=EAGAIN (for timeout) when recv() returns -1 when using these techniques to see if you actually timed out. If you want to jump off the deep end of the pool, use a select() call (which takes a timeout parameter) instead of the blocking recv().
You can try out the template version like this:
./hw4 -d -n nameserver -i domain
to find your local DNS server, check your network settings, or run “cat /etc/resolv.conf” on a non-windows machine.
** MASSIVE HINT: RECURSION IS YOUR FRIEND **
Usage: hw5 [-d] -n nameserver -i domain/ip_address
-d: debug
./hw5 -i a.root-servers.net
a.root-servers.net resolves to 198.41.0.4
./hw5 -i nibbles.cs.uic.edu
nibbles.cs.uic.edu resolves to 131.193.34.150
./hw5 -d -n 192.228.79.201 -i www.cs.uic.edu
Resolving www.cs.uic.edu using server 192.228.79.201
The name edu can be resolved by NS: l.edu-servers.net
The name edu can be resolved by NS: g.edu-servers.net
The name edu can be resolved by NS: a.edu-servers.net
The name edu can be resolved by NS: d.edu-servers.net
The name edu can be resolved by NS: f.edu-servers.net
The name edu can be resolved by NS: c.edu-servers.net
The name a.edu-servers.net resolves to IP addr: 192.5.6.30
The name c.edu-servers.net resolves to IP addr: 192.26.92.30
The name d.edu-servers.net resolves to IP addr: 192.31.80.30
The name f.edu-servers.net resolves to IP addr: 192.35.51.30
The name g.edu-servers.net resolves to IP addr: 192.42.93.30
The name l.edu-servers.net resolves to IP addr: 192.41.162.30
Ignoring IPv6 record
Resolving www.cs.uic.edu using server 192.41.162.30
The name uic.edu can be resolved by NS: uic-dns2.uic.edu
The name uic.edu can be resolved by NS: uic-dns3.uic.edu
The name uic.edu can be resolved by NS: uic-dns1.uic.edu
The name uic-dns2.uic.edu resolves to IP addr: 128.248.7.50
The name uic-dns3.uic.edu resolves to IP addr: 128.248.171.50
The name uic-dns1.uic.edu resolves to IP addr: 128.248.2.50
Resolving www.cs.uic.edu using server 128.248.2.50
The name cs.uic.edu can be resolved by NS: garcon.eecs.uic.edu
The name cs.uic.edu can be resolved by NS: fred.eecs.uic.edu
The name fred.eecs.uic.edu resolves to IP addr: 131.193.40.254
The name garcon.eecs.uic.edu resolves to IP addr: 131.193.32.254
Resolving www.cs.uic.edu using server 131.193.40.254
The name www.cs.uic.edu resolves to IP addr: 131.193.32.29
www.cs.uic.edu resolves to 131.193.32.29
./hw5 -d -i www.yahoo.com.tw
Resolving www.yahoo.com.tw using server 192.112.36.4
The name tw can be resolved by NS: c.dns.tw
The name tw can be resolved by NS: d.dns.tw
The name tw can be resolved by NS: i.dns.tw
The name tw can be resolved by NS: h.dns.tw
The name tw can be resolved by NS: a.dns.tw
The name tw can be resolved by NS: f.dns.tw
The name tw can be resolved by NS: sec4.apnic.net
The name tw can be resolved by NS: g.dns.tw
The name tw can be resolved by NS: e.dns.tw
The name tw can be resolved by NS: ns.twnic.net
The name tw can be resolved by NS: b.dns.tw
The name a.dns.tw resolves to IP addr: 203.73.24.8
The name b.dns.tw resolves to IP addr: 210.201.138.58
The name c.dns.tw resolves to IP addr: 61.220.48.1
The name d.dns.tw resolves to IP addr: 210.17.9.230
The name e.dns.tw resolves to IP addr: 211.20.231.11
The name f.dns.tw resolves to IP addr: 163.28.1.10
The name g.dns.tw resolves to IP addr: 220.229.225.195
The name h.dns.tw resolves to IP addr: 203.119.3.1
The name i.dns.tw resolves to IP addr: 194.0.11.105
The name ns.twnic.net resolves to IP addr: 192.83.166.11
The name sec4.apnic.net resolves to IP addr: 202.12.31.141
Ignoring IPv6 record
Ignoring IPv6 record
Ignoring IPv6 record
Resolving www.yahoo.com.tw using server 202.12.31.141
The name yahoo.com.tw can be resolved by NS: ns1.yahoo.com
The name yahoo.com.tw can be resolved by NS: ns4.yahoo.com
The name yahoo.com.tw can be resolved by NS: ns2.yahoo.com
The name yahoo.com.tw can be resolved by NS: ns5.yahoo.com
The name yahoo.com.tw can be resolved by NS: ns3.yahoo.com
No A record for server ns1.yahoo.com, asking root servers.
Resolving ns1.yahoo.com using server 192.5.5.241
The name com can be resolved by NS: f.gtld-servers.net
The name com can be resolved by NS: j.gtld-servers.net
The name com can be resolved by NS: h.gtld-servers.net
The name com can be resolved by NS: m.gtld-servers.net
The name com can be resolved by NS: k.gtld-servers.net
The name com can be resolved by NS: d.gtld-servers.net
The name com can be resolved by NS: b.gtld-servers.net
The name com can be resolved by NS: i.gtld-servers.net
The name com can be resolved by NS: c.gtld-servers.net
The name com can be resolved by NS: g.gtld-servers.net
The name com can be resolved by NS: e.gtld-servers.net
The name com can be resolved by NS: a.gtld-servers.net
The name com can be resolved by NS: l.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
Ignoring IPv6 record
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
Ignoring IPv6 record
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
Resolving ns1.yahoo.com using server 192.41.162.30
The name yahoo.com can be resolved by NS: ns1.yahoo.com
The name yahoo.com can be resolved by NS: ns5.yahoo.com
The name yahoo.com can be resolved by NS: ns2.yahoo.com
The name yahoo.com can be resolved by NS: ns3.yahoo.com
The name yahoo.com can be resolved by NS: ns4.yahoo.com
Ignoring IPv6 record
The name ns1.yahoo.com resolves to IP addr: 68.180.131.16
The name ns5.yahoo.com resolves to IP addr: 119.160.247.124
Ignoring IPv6 record
The name ns2.yahoo.com resolves to IP addr: 68.142.255.16
The name ns3.yahoo.com resolves to IP addr: 203.84.221.53
Ignoring IPv6 record
The name ns4.yahoo.com resolves to IP addr: 98.138.11.157
Resolving ns1.yahoo.com using server 98.138.11.157
The name ns1.yahoo.com resolves to IP addr: 68.180.131.16
No A record for server ns4.yahoo.com, asking root servers.
Resolving ns4.yahoo.com using server 128.63.2.53
The name com can be resolved by NS: a.gtld-servers.net
The name com can be resolved by NS: b.gtld-servers.net
The name com can be resolved by NS: c.gtld-servers.net
The name com can be resolved by NS: d.gtld-servers.net
The name com can be resolved by NS: e.gtld-servers.net
The name com can be resolved by NS: f.gtld-servers.net
The name com can be resolved by NS: g.gtld-servers.net
The name com can be resolved by NS: h.gtld-servers.net
The name com can be resolved by NS: i.gtld-servers.net
The name com can be resolved by NS: j.gtld-servers.net
The name com can be resolved by NS: k.gtld-servers.net
The name com can be resolved by NS: l.gtld-servers.net
The name com can be resolved by NS: m.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
The name m.gtld-servers.net resolves to IP addr: 192.55.83.30
Ignoring IPv6 record
Resolving ns4.yahoo.com using server 192.55.83.30
The name yahoo.com can be resolved by NS: ns1.yahoo.com
The name yahoo.com can be resolved by NS: ns5.yahoo.com
The name yahoo.com can be resolved by NS: ns2.yahoo.com
The name yahoo.com can be resolved by NS: ns3.yahoo.com
The name yahoo.com can be resolved by NS: ns4.yahoo.com
Ignoring IPv6 record
The name ns1.yahoo.com resolves to IP addr: 68.180.131.16
The name ns5.yahoo.com resolves to IP addr: 119.160.247.124
Ignoring IPv6 record
The name ns2.yahoo.com resolves to IP addr: 68.142.255.16
The name ns3.yahoo.com resolves to IP addr: 203.84.221.53
Ignoring IPv6 record
The name ns4.yahoo.com resolves to IP addr: 98.138.11.157
Resolving ns4.yahoo.com using server 98.138.11.157
The name ns4.yahoo.com resolves to IP addr: 98.138.11.157
No A record for server ns2.yahoo.com, asking root servers.
Resolving ns2.yahoo.com using server 192.112.36.4
The name com can be resolved by NS: g.gtld-servers.net
The name com can be resolved by NS: k.gtld-servers.net
The name com can be resolved by NS: j.gtld-servers.net
The name com can be resolved by NS: f.gtld-servers.net
The name com can be resolved by NS: a.gtld-servers.net
The name com can be resolved by NS: l.gtld-servers.net
The name com can be resolved by NS: i.gtld-servers.net
The name com can be resolved by NS: h.gtld-servers.net
The name com can be resolved by NS: b.gtld-servers.net
The name com can be resolved by NS: e.gtld-servers.net
The name com can be resolved by NS: c.gtld-servers.net
The name com can be resolved by NS: m.gtld-servers.net
The name com can be resolved by NS: d.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
The name m.gtld-servers.net resolves to IP addr: 192.55.83.30
Ignoring IPv6 record
Resolving ns2.yahoo.com using server 192.41.162.30
The name yahoo.com can be resolved by NS: ns1.yahoo.com
The name yahoo.com can be resolved by NS: ns5.yahoo.com
The name yahoo.com can be resolved by NS: ns2.yahoo.com
The name yahoo.com can be resolved by NS: ns3.yahoo.com
The name yahoo.com can be resolved by NS: ns4.yahoo.com
Ignoring IPv6 record
The name ns1.yahoo.com resolves to IP addr: 68.180.131.16
The name ns5.yahoo.com resolves to IP addr: 119.160.247.124
Ignoring IPv6 record
The name ns2.yahoo.com resolves to IP addr: 68.142.255.16
The name ns3.yahoo.com resolves to IP addr: 203.84.221.53
Ignoring IPv6 record
The name ns4.yahoo.com resolves to IP addr: 98.138.11.157
Resolving ns2.yahoo.com using server 98.138.11.157
The name ns2.yahoo.com resolves to IP addr: 68.142.255.16
No A record for server ns5.yahoo.com, asking root servers.
Resolving ns5.yahoo.com using server 192.58.128.30
The name com can be resolved by NS: a.gtld-servers.net
The name com can be resolved by NS: b.gtld-servers.net
The name com can be resolved by NS: c.gtld-servers.net
The name com can be resolved by NS: d.gtld-servers.net
The name com can be resolved by NS: e.gtld-servers.net
The name com can be resolved by NS: f.gtld-servers.net
The name com can be resolved by NS: g.gtld-servers.net
The name com can be resolved by NS: h.gtld-servers.net
The name com can be resolved by NS: i.gtld-servers.net
The name com can be resolved by NS: j.gtld-servers.net
The name com can be resolved by NS: k.gtld-servers.net
The name com can be resolved by NS: l.gtld-servers.net
The name com can be resolved by NS: m.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
The name m.gtld-servers.net resolves to IP addr: 192.55.83.30
Ignoring IPv6 record
Resolving ns5.yahoo.com using server 192.55.83.30
The name yahoo.com can be resolved by NS: ns1.yahoo.com
The name yahoo.com can be resolved by NS: ns5.yahoo.com
The name yahoo.com can be resolved by NS: ns2.yahoo.com
The name yahoo.com can be resolved by NS: ns3.yahoo.com
The name yahoo.com can be resolved by NS: ns4.yahoo.com
Ignoring IPv6 record
The name ns1.yahoo.com resolves to IP addr: 68.180.131.16
The name ns5.yahoo.com resolves to IP addr: 119.160.247.124
Ignoring IPv6 record
The name ns2.yahoo.com resolves to IP addr: 68.142.255.16
The name ns3.yahoo.com resolves to IP addr: 203.84.221.53
Ignoring IPv6 record
The name ns4.yahoo.com resolves to IP addr: 98.138.11.157
Resolving ns5.yahoo.com using server 98.138.11.157
The name ns5.yahoo.com resolves to IP addr: 119.160.247.124
No A record for server ns3.yahoo.com, asking root servers.
Resolving ns3.yahoo.com using server 192.5.5.241
The name com can be resolved by NS: m.gtld-servers.net
The name com can be resolved by NS: g.gtld-servers.net
The name com can be resolved by NS: d.gtld-servers.net
The name com can be resolved by NS: f.gtld-servers.net
The name com can be resolved by NS: l.gtld-servers.net
The name com can be resolved by NS: b.gtld-servers.net
The name com can be resolved by NS: h.gtld-servers.net
The name com can be resolved by NS: e.gtld-servers.net
The name com can be resolved by NS: a.gtld-servers.net
The name com can be resolved by NS: k.gtld-servers.net
The name com can be resolved by NS: i.gtld-servers.net
The name com can be resolved by NS: j.gtld-servers.net
The name com can be resolved by NS: c.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
Ignoring IPv6 record
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
Ignoring IPv6 record
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
Resolving ns3.yahoo.com using server 192.41.162.30
The name yahoo.com can be resolved by NS: ns1.yahoo.com
The name yahoo.com can be resolved by NS: ns5.yahoo.com
The name yahoo.com can be resolved by NS: ns2.yahoo.com
The name yahoo.com can be resolved by NS: ns3.yahoo.com
The name yahoo.com can be resolved by NS: ns4.yahoo.com
Ignoring IPv6 record
The name ns1.yahoo.com resolves to IP addr: 68.180.131.16
The name ns5.yahoo.com resolves to IP addr: 119.160.247.124
Ignoring IPv6 record
The name ns2.yahoo.com resolves to IP addr: 68.142.255.16
The name ns3.yahoo.com resolves to IP addr: 203.84.221.53
Ignoring IPv6 record
The name ns4.yahoo.com resolves to IP addr: 98.138.11.157
Resolving ns3.yahoo.com using server 98.138.11.157
The name ns3.yahoo.com resolves to IP addr: 203.84.221.53
Resolving www.yahoo.com.tw using server 68.142.255.16
The name www.yahoo.com.tw is also known as rc.yahoo.com.
Resolving rc.yahoo.com using server 192.112.36.4
The name com can be resolved by NS: m.gtld-servers.net
The name com can be resolved by NS: k.gtld-servers.net
The name com can be resolved by NS: i.gtld-servers.net
The name com can be resolved by NS: a.gtld-servers.net
The name com can be resolved by NS: g.gtld-servers.net
The name com can be resolved by NS: j.gtld-servers.net
The name com can be resolved by NS: f.gtld-servers.net
The name com can be resolved by NS: c.gtld-servers.net
The name com can be resolved by NS: h.gtld-servers.net
The name com can be resolved by NS: l.gtld-servers.net
The name com can be resolved by NS: b.gtld-servers.net
The name com can be resolved by NS: e.gtld-servers.net
The name com can be resolved by NS: d.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
The name m.gtld-servers.net resolves to IP addr: 192.55.83.30
Ignoring IPv6 record
Resolving rc.yahoo.com using server 192.55.83.30
The name yahoo.com can be resolved by NS: ns1.yahoo.com
The name yahoo.com can be resolved by NS: ns5.yahoo.com
The name yahoo.com can be resolved by NS: ns2.yahoo.com
The name yahoo.com can be resolved by NS: ns3.yahoo.com
The name yahoo.com can be resolved by NS: ns4.yahoo.com
Ignoring IPv6 record
The name ns1.yahoo.com resolves to IP addr: 68.180.131.16
The name ns5.yahoo.com resolves to IP addr: 119.160.247.124
Ignoring IPv6 record
The name ns2.yahoo.com resolves to IP addr: 68.142.255.16
The name ns3.yahoo.com resolves to IP addr: 203.84.221.53
Ignoring IPv6 record
The name ns4.yahoo.com resolves to IP addr: 98.138.11.157
Resolving rc.yahoo.com using server 98.138.11.157
The name rc.yahoo.com is also known as src.g03.yahoodns.net.
Resolving src.g03.yahoodns.net using server 192.58.128.30
The name net can be resolved by NS: a.gtld-servers.net
The name net can be resolved by NS: b.gtld-servers.net
The name net can be resolved by NS: c.gtld-servers.net
The name net can be resolved by NS: d.gtld-servers.net
The name net can be resolved by NS: e.gtld-servers.net
The name net can be resolved by NS: f.gtld-servers.net
The name net can be resolved by NS: g.gtld-servers.net
The name net can be resolved by NS: h.gtld-servers.net
The name net can be resolved by NS: i.gtld-servers.net
The name net can be resolved by NS: j.gtld-servers.net
The name net can be resolved by NS: k.gtld-servers.net
The name net can be resolved by NS: l.gtld-servers.net
The name net can be resolved by NS: m.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
The name m.gtld-servers.net resolves to IP addr: 192.55.83.30
Ignoring IPv6 record
Resolving src.g03.yahoodns.net using server 192.55.83.30
The name yahoodns.net can be resolved by NS: ns1.yahoo.com
The name yahoodns.net can be resolved by NS: ns5.yahoo.com
The name yahoodns.net can be resolved by NS: ns2.yahoo.com
The name yahoodns.net can be resolved by NS: ns3.yahoo.com
The name yahoodns.net can be resolved by NS: ns4.yahoo.com
Ignoring IPv6 record
The name ns1.yahoo.com resolves to IP addr: 68.180.131.16
The name ns5.yahoo.com resolves to IP addr: 119.160.247.124
Ignoring IPv6 record
The name ns2.yahoo.com resolves to IP addr: 68.142.255.16
The name ns3.yahoo.com resolves to IP addr: 203.84.221.53
Ignoring IPv6 record
The name ns4.yahoo.com resolves to IP addr: 98.138.11.157
Resolving src.g03.yahoodns.net using server 203.84.221.53
The name g03.yahoodns.net can be resolved by NS: yf1.yahoo.com
The name g03.yahoodns.net can be resolved by NS: yf2.yahoo.com
The name g03.yahoodns.net can be resolved by NS: yf3.a1.b.yahoo.net
The name g03.yahoodns.net can be resolved by NS: yf4.a1.b.yahoo.net
The name yf1.yahoo.com resolves to IP addr: 68.142.254.15
The name yf2.yahoo.com resolves to IP addr: 68.180.130.15
Resolving src.g03.yahoodns.net using server 68.180.130.15
The name src.g03.yahoodns.net resolves to IP addr: 74.6.50.150
www.yahoo.com.tw resolves to 74.6.50.150
./hw5 -d -i 128.30.76.78
Resolving 128.30.76.78 using server 192.112.36.4
The name in-addr.arpa can be resolved by NS: e.in-addr-servers.arpa
The name in-addr.arpa can be resolved by NS: d.in-addr-servers.arpa
The name in-addr.arpa can be resolved by NS: c.in-addr-servers.arpa
The name in-addr.arpa can be resolved by NS: f.in-addr-servers.arpa
The name in-addr.arpa can be resolved by NS: b.in-addr-servers.arpa
The name in-addr.arpa can be resolved by NS: a.in-addr-servers.arpa
The name a.in-addr-servers.arpa resolves to IP addr: 199.212.0.73
The name b.in-addr-servers.arpa resolves to IP addr: 199.253.183.183
The name c.in-addr-servers.arpa resolves to IP addr: 196.216.169.10
The name d.in-addr-servers.arpa resolves to IP addr: 200.10.60.53
The name e.in-addr-servers.arpa resolves to IP addr: 203.119.86.101
The name f.in-addr-servers.arpa resolves to IP addr: 193.0.9.1
Ignoring IPv6 record
Ignoring IPv6 record
Ignoring IPv6 record
Ignoring IPv6 record
Ignoring IPv6 record
Ignoring IPv6 record
Resolving 128.30.76.78 using server 193.0.9.1
The name 128.in-addr.arpa can be resolved by NS: r.arin.net
The name 128.in-addr.arpa can be resolved by NS: u.arin.net
The name 128.in-addr.arpa can be resolved by NS: x.arin.net
The name 128.in-addr.arpa can be resolved by NS: y.arin.net
The name 128.in-addr.arpa can be resolved by NS: z.arin.net
The name 128.in-addr.arpa can be resolved by NS: arin.authdns.ripe.net
No A record for server r.arin.net, asking root servers.
Resolving r.arin.net using server 192.5.5.241
The name net can be resolved by NS: j.gtld-servers.net
The name net can be resolved by NS: a.gtld-servers.net
The name net can be resolved by NS: g.gtld-servers.net
The name net can be resolved by NS: e.gtld-servers.net
The name net can be resolved by NS: d.gtld-servers.net
The name net can be resolved by NS: b.gtld-servers.net
The name net can be resolved by NS: k.gtld-servers.net
The name net can be resolved by NS: l.gtld-servers.net
The name net can be resolved by NS: m.gtld-servers.net
The name net can be resolved by NS: h.gtld-servers.net
The name net can be resolved by NS: c.gtld-servers.net
The name net can be resolved by NS: f.gtld-servers.net
The name net can be resolved by NS: i.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
Ignoring IPv6 record
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
Ignoring IPv6 record
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
Resolving r.arin.net using server 192.41.162.30
The name arin.net can be resolved by NS: ns1.arin.net
The name arin.net can be resolved by NS: ns2.arin.net
The name arin.net can be resolved by NS: v.arin.net
The name arin.net can be resolved by NS: u.arin.net
The name arin.net can be resolved by NS: ns3.arin.net
The name ns1.arin.net resolves to IP addr: 199.212.0.108
Ignoring IPv6 record
The name ns2.arin.net resolves to IP addr: 199.71.0.108
Ignoring IPv6 record
Ignoring IPv6 record
The name v.arin.net resolves to IP addr: 63.243.194.2
Ignoring IPv6 record
The name u.arin.net resolves to IP addr: 204.61.216.50
The name ns3.arin.net resolves to IP addr: 199.5.26.108
Ignoring IPv6 record
Resolving r.arin.net using server 199.5.26.108
The name r.arin.net resolves to IP addr: 199.180.180.63
No A record for server u.arin.net, asking root servers.
Resolving u.arin.net using server 128.63.2.53
The name net can be resolved by NS: a.gtld-servers.net
The name net can be resolved by NS: b.gtld-servers.net
The name net can be resolved by NS: c.gtld-servers.net
The name net can be resolved by NS: d.gtld-servers.net
The name net can be resolved by NS: e.gtld-servers.net
The name net can be resolved by NS: f.gtld-servers.net
The name net can be resolved by NS: g.gtld-servers.net
The name net can be resolved by NS: h.gtld-servers.net
The name net can be resolved by NS: i.gtld-servers.net
The name net can be resolved by NS: j.gtld-servers.net
The name net can be resolved by NS: k.gtld-servers.net
The name net can be resolved by NS: l.gtld-servers.net
The name net can be resolved by NS: m.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
The name m.gtld-servers.net resolves to IP addr: 192.55.83.30
Ignoring IPv6 record
Resolving u.arin.net using server 192.55.83.30
The name arin.net can be resolved by NS: ns1.arin.net
The name arin.net can be resolved by NS: ns2.arin.net
The name arin.net can be resolved by NS: v.arin.net
The name arin.net can be resolved by NS: u.arin.net
The name arin.net can be resolved by NS: ns3.arin.net
The name ns1.arin.net resolves to IP addr: 199.212.0.108
Ignoring IPv6 record
The name ns2.arin.net resolves to IP addr: 199.71.0.108
Ignoring IPv6 record
Ignoring IPv6 record
The name v.arin.net resolves to IP addr: 63.243.194.2
Ignoring IPv6 record
The name u.arin.net resolves to IP addr: 204.61.216.50
The name ns3.arin.net resolves to IP addr: 199.5.26.108
Ignoring IPv6 record
Resolving u.arin.net using server 199.5.26.108
The name u.arin.net resolves to IP addr: 204.61.216.50
No A record for server x.arin.net, asking root servers.
Resolving x.arin.net using server 192.112.36.4
The name net can be resolved by NS: h.gtld-servers.net
The name net can be resolved by NS: b.gtld-servers.net
The name net can be resolved by NS: a.gtld-servers.net
The name net can be resolved by NS: c.gtld-servers.net
The name net can be resolved by NS: f.gtld-servers.net
The name net can be resolved by NS: l.gtld-servers.net
The name net can be resolved by NS: i.gtld-servers.net
The name net can be resolved by NS: m.gtld-servers.net
The name net can be resolved by NS: j.gtld-servers.net
The name net can be resolved by NS: e.gtld-servers.net
The name net can be resolved by NS: d.gtld-servers.net
The name net can be resolved by NS: k.gtld-servers.net
The name net can be resolved by NS: g.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
The name m.gtld-servers.net resolves to IP addr: 192.55.83.30
Ignoring IPv6 record
Resolving x.arin.net using server 192.55.83.30
The name arin.net can be resolved by NS: ns1.arin.net
The name arin.net can be resolved by NS: ns2.arin.net
The name arin.net can be resolved by NS: v.arin.net
The name arin.net can be resolved by NS: u.arin.net
The name arin.net can be resolved by NS: ns3.arin.net
The name ns1.arin.net resolves to IP addr: 199.212.0.108
Ignoring IPv6 record
The name ns2.arin.net resolves to IP addr: 199.71.0.108
Ignoring IPv6 record
Ignoring IPv6 record
The name v.arin.net resolves to IP addr: 63.243.194.2
Ignoring IPv6 record
The name u.arin.net resolves to IP addr: 204.61.216.50
The name ns3.arin.net resolves to IP addr: 199.5.26.108
Ignoring IPv6 record
Resolving x.arin.net using server 199.5.26.108
The name x.arin.net resolves to IP addr: 199.71.0.63
No A record for server y.arin.net, asking root servers.
Resolving y.arin.net using server 192.58.128.30
The name net can be resolved by NS: a.gtld-servers.net
The name net can be resolved by NS: b.gtld-servers.net
The name net can be resolved by NS: c.gtld-servers.net
The name net can be resolved by NS: d.gtld-servers.net
The name net can be resolved by NS: e.gtld-servers.net
The name net can be resolved by NS: f.gtld-servers.net
The name net can be resolved by NS: g.gtld-servers.net
The name net can be resolved by NS: h.gtld-servers.net
The name net can be resolved by NS: i.gtld-servers.net
The name net can be resolved by NS: j.gtld-servers.net
The name net can be resolved by NS: k.gtld-servers.net
The name net can be resolved by NS: l.gtld-servers.net
The name net can be resolved by NS: m.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
The name m.gtld-servers.net resolves to IP addr: 192.55.83.30
Ignoring IPv6 record
Resolving y.arin.net using server 192.55.83.30
The name arin.net can be resolved by NS: ns1.arin.net
The name arin.net can be resolved by NS: ns2.arin.net
The name arin.net can be resolved by NS: v.arin.net
The name arin.net can be resolved by NS: u.arin.net
The name arin.net can be resolved by NS: ns3.arin.net
The name ns1.arin.net resolves to IP addr: 199.212.0.108
Ignoring IPv6 record
The name ns2.arin.net resolves to IP addr: 199.71.0.108
Ignoring IPv6 record
Ignoring IPv6 record
The name v.arin.net resolves to IP addr: 63.243.194.2
Ignoring IPv6 record
The name u.arin.net resolves to IP addr: 204.61.216.50
The name ns3.arin.net resolves to IP addr: 199.5.26.108
Ignoring IPv6 record
Resolving y.arin.net using server 199.5.26.108
The name y.arin.net resolves to IP addr: 192.82.134.30
No A record for server z.arin.net, asking root servers.
Resolving z.arin.net using server 192.5.5.241
The name net can be resolved by NS: h.gtld-servers.net
The name net can be resolved by NS: f.gtld-servers.net
The name net can be resolved by NS: d.gtld-servers.net
The name net can be resolved by NS: i.gtld-servers.net
The name net can be resolved by NS: j.gtld-servers.net
The name net can be resolved by NS: l.gtld-servers.net
The name net can be resolved by NS: c.gtld-servers.net
The name net can be resolved by NS: k.gtld-servers.net
The name net can be resolved by NS: b.gtld-servers.net
The name net can be resolved by NS: e.gtld-servers.net
The name net can be resolved by NS: g.gtld-servers.net
The name net can be resolved by NS: a.gtld-servers.net
The name net can be resolved by NS: m.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
Ignoring IPv6 record
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
Ignoring IPv6 record
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
Resolving z.arin.net using server 192.41.162.30
The name arin.net can be resolved by NS: ns1.arin.net
The name arin.net can be resolved by NS: ns2.arin.net
The name arin.net can be resolved by NS: v.arin.net
The name arin.net can be resolved by NS: u.arin.net
The name arin.net can be resolved by NS: ns3.arin.net
The name ns1.arin.net resolves to IP addr: 199.212.0.108
Ignoring IPv6 record
The name ns2.arin.net resolves to IP addr: 199.71.0.108
Ignoring IPv6 record
Ignoring IPv6 record
The name v.arin.net resolves to IP addr: 63.243.194.2
Ignoring IPv6 record
The name u.arin.net resolves to IP addr: 204.61.216.50
The name ns3.arin.net resolves to IP addr: 199.5.26.108
Ignoring IPv6 record
Resolving z.arin.net using server 199.5.26.108
The name z.arin.net resolves to IP addr: 199.212.0.63
No A record for server arin.authdns.ripe.net, asking root servers.
Resolving arin.authdns.ripe.net using server 128.63.2.53
The name net can be resolved by NS: a.gtld-servers.net
The name net can be resolved by NS: b.gtld-servers.net
The name net can be resolved by NS: c.gtld-servers.net
The name net can be resolved by NS: d.gtld-servers.net
The name net can be resolved by NS: e.gtld-servers.net
The name net can be resolved by NS: f.gtld-servers.net
The name net can be resolved by NS: g.gtld-servers.net
The name net can be resolved by NS: h.gtld-servers.net
The name net can be resolved by NS: i.gtld-servers.net
The name net can be resolved by NS: j.gtld-servers.net
The name net can be resolved by NS: k.gtld-servers.net
The name net can be resolved by NS: l.gtld-servers.net
The name net can be resolved by NS: m.gtld-servers.net
The name a.gtld-servers.net resolves to IP addr: 192.5.6.30
The name b.gtld-servers.net resolves to IP addr: 192.33.14.30
The name c.gtld-servers.net resolves to IP addr: 192.26.92.30
The name d.gtld-servers.net resolves to IP addr: 192.31.80.30
The name e.gtld-servers.net resolves to IP addr: 192.12.94.30
The name f.gtld-servers.net resolves to IP addr: 192.35.51.30
The name g.gtld-servers.net resolves to IP addr: 192.42.93.30
The name h.gtld-servers.net resolves to IP addr: 192.54.112.30
The name i.gtld-servers.net resolves to IP addr: 192.43.172.30
The name j.gtld-servers.net resolves to IP addr: 192.48.79.30
The name k.gtld-servers.net resolves to IP addr: 192.52.178.30
The name l.gtld-servers.net resolves to IP addr: 192.41.162.30
The name m.gtld-servers.net resolves to IP addr: 192.55.83.30
Ignoring IPv6 record
Resolving arin.authdns.ripe.net using server 192.55.83.30
The name ripe.net can be resolved by NS: ns3.nic.fr
The name ripe.net can be resolved by NS: sec1.apnic.net
The name ripe.net can be resolved by NS: sec3.apnic.net
The name ripe.net can be resolved by NS: tinnie.arin.net
The name ripe.net can be resolved by NS: sns-pb.isc.org
The name ripe.net can be resolved by NS: pri.authdns.ripe.net
Ignoring IPv6 record
The name sec1.apnic.net resolves to IP addr: 202.12.29.59
Ignoring IPv6 record
The name sec3.apnic.net resolves to IP addr: 202.12.28.140
The name tinnie.arin.net resolves to IP addr: 199.212.0.53
Ignoring IPv6 record
The name pri.authdns.ripe.net resolves to IP addr: 193.0.9.5
Ignoring IPv6 record
Resolving arin.authdns.ripe.net using server 193.0.9.5
The name arin.authdns.ripe.net resolves to IP addr: 193.0.9.10
Resolving 128.30.76.78 using server 192.82.134.30
The name 30.128.in-addr.arpa can be resolved by NS: auth-ns1.csail.mit.edu
The name 30.128.in-addr.arpa can be resolved by NS: auth-ns2.csail.mit.edu
The name 30.128.in-addr.arpa can be resolved by NS: auth-ns0.csail.mit.edu
The name 30.128.in-addr.arpa can be resolved by NS: auth-ns3.csail.mit.edu
No A record for server auth-ns1.csail.mit.edu, asking root servers.
Resolving auth-ns1.csail.mit.edu using server 192.58.128.30
The name edu can be resolved by NS: a.edu-servers.net
The name edu can be resolved by NS: c.edu-servers.net
The name edu can be resolved by NS: d.edu-servers.net
The name edu can be resolved by NS: f.edu-servers.net
The name edu can be resolved by NS: g.edu-servers.net
The name edu can be resolved by NS: l.edu-servers.net
The name a.edu-servers.net resolves to IP addr: 192.5.6.30
The name c.edu-servers.net resolves to IP addr: 192.26.92.30
The name d.edu-servers.net resolves to IP addr: 192.31.80.30
The name f.edu-servers.net resolves to IP addr: 192.35.51.30
The name g.edu-servers.net resolves to IP addr: 192.42.93.30
The name l.edu-servers.net resolves to IP addr: 192.41.162.30
Ignoring IPv6 record
Resolving auth-ns1.csail.mit.edu using server 192.41.162.30
The name mit.edu can be resolved by NS: usw2.akam.net
The name mit.edu can be resolved by NS: asia1.akam.net
The name mit.edu can be resolved by NS: asia2.akam.net
The name mit.edu can be resolved by NS: use2.akam.net
The name mit.edu can be resolved by NS: ns1-37.akam.net
The name mit.edu can be resolved by NS: ns1-173.akam.net
The name mit.edu can be resolved by NS: eur5.akam.net
The name mit.edu can be resolved by NS: use5.akam.net
The name usw2.akam.net resolves to IP addr: 184.26.161.64
The name asia1.akam.net resolves to IP addr: 95.100.175.64
The name asia2.akam.net resolves to IP addr: 95.101.36.64
The name use2.akam.net resolves to IP addr: 96.7.49.64
The name ns1-37.akam.net resolves to IP addr: 193.108.91.37
Ignoring IPv6 record
The name ns1-173.akam.net resolves to IP addr: 193.108.91.173
Ignoring IPv6 record
The name eur5.akam.net resolves to IP addr: 23.74.25.64
The name use5.akam.net resolves to IP addr: 2.16.40.64
Ignoring IPv6 record
Resolving auth-ns1.csail.mit.edu using server 2.16.40.64
The name csail.mit.edu can be resolved by NS: auth-ns3.csail.mit.edu
The name csail.mit.edu can be resolved by NS: auth-ns0.csail.mit.edu
The name csail.mit.edu can be resolved by NS: auth-ns1.csail.mit.edu
The name csail.mit.edu can be resolved by NS: auth-ns2.csail.mit.edu
The name auth-ns0.csail.mit.edu resolves to IP addr: 128.30.2.123
The name auth-ns1.csail.mit.edu resolves to IP addr: 18.24.0.120
The name auth-ns2.csail.mit.edu resolves to IP addr: 128.52.32.80
The name auth-ns3.csail.mit.edu resolves to IP addr: 128.52.32.80
Resolving auth-ns1.csail.mit.edu using server 128.52.32.80
The name auth-ns1.csail.mit.edu resolves to IP addr: 18.24.0.120
No A record for server auth-ns2.csail.mit.edu, asking root servers.
Resolving auth-ns2.csail.mit.edu using server 192.112.36.4
The name edu can be resolved by NS: g.edu-servers.net
The name edu can be resolved by NS: c.edu-servers.net
The name edu can be resolved by NS: f.edu-servers.net
The name edu can be resolved by NS: d.edu-servers.net
The name edu can be resolved by NS: a.edu-servers.net
The name edu can be resolved by NS: l.edu-servers.net
The name a.edu-servers.net resolves to IP addr: 192.5.6.30
The name c.edu-servers.net resolves to IP addr: 192.26.92.30
The name d.edu-servers.net resolves to IP addr: 192.31.80.30
The name f.edu-servers.net resolves to IP addr: 192.35.51.30
The name g.edu-servers.net resolves to IP addr: 192.42.93.30
The name l.edu-servers.net resolves to IP addr: 192.41.162.30
Ignoring IPv6 record
Resolving auth-ns2.csail.mit.edu using server 192.41.162.30
The name mit.edu can be resolved by NS: usw2.akam.net
The name mit.edu can be resolved by NS: asia1.akam.net
The name mit.edu can be resolved by NS: asia2.akam.net
The name mit.edu can be resolved by NS: use2.akam.net
The name mit.edu can be resolved by NS: ns1-37.akam.net
The name mit.edu can be resolved by NS: ns1-173.akam.net
The name mit.edu can be resolved by NS: eur5.akam.net
The name mit.edu can be resolved by NS: use5.akam.net
The name usw2.akam.net resolves to IP addr: 184.26.161.64
The name asia1.akam.net resolves to IP addr: 95.100.175.64
The name asia2.akam.net resolves to IP addr: 95.101.36.64
The name use2.akam.net resolves to IP addr: 96.7.49.64
The name ns1-37.akam.net resolves to IP addr: 193.108.91.37
Ignoring IPv6 record
The name ns1-173.akam.net resolves to IP addr: 193.108.91.173
Ignoring IPv6 record
The name eur5.akam.net resolves to IP addr: 23.74.25.64
The name use5.akam.net resolves to IP addr: 2.16.40.64
Ignoring IPv6 record
Resolving auth-ns2.csail.mit.edu using server 2.16.40.64
The name csail.mit.edu can be resolved by NS: auth-ns2.csail.mit.edu
The name csail.mit.edu can be resolved by NS: auth-ns3.csail.mit.edu
The name csail.mit.edu can be resolved by NS: auth-ns0.csail.mit.edu
The name csail.mit.edu can be resolved by NS: auth-ns1.csail.mit.edu
The name auth-ns0.csail.mit.edu resolves to IP addr: 128.30.2.123
The name auth-ns1.csail.mit.edu resolves to IP addr: 18.24.0.120
The name auth-ns2.csail.mit.edu resolves to IP addr: 128.52.32.80
The name auth-ns3.csail.mit.edu resolves to IP addr: 128.52.32.80
Resolving auth-ns2.csail.mit.edu using server 128.52.32.80
The name auth-ns2.csail.mit.edu resolves to IP addr: 128.52.32.80
No A record for server auth-ns0.csail.mit.edu, asking root servers.
Resolving auth-ns0.csail.mit.edu using server 192.228.79.201
The name edu can be resolved by NS: g.edu-servers.net
The name edu can be resolved by NS: d.edu-servers.net
The name edu can be resolved by NS: a.edu-servers.net
The name edu can be resolved by NS: l.edu-servers.net
The name edu can be resolved by NS: f.edu-servers.net
The name edu can be resolved by NS: c.edu-servers.net
The name a.edu-servers.net resolves to IP addr: 192.5.6.30
The name c.edu-servers.net resolves to IP addr: 192.26.92.30
The name d.edu-servers.net resolves to IP addr: 192.31.80.30
The name f.edu-servers.net resolves to IP addr: 192.35.51.30
The name g.edu-servers.net resolves to IP addr: 192.42.93.30
The name l.edu-servers.net resolves to IP addr: 192.41.162.30
Ignoring IPv6 record
Resolving auth-ns0.csail.mit.edu using server 192.42.93.30
The name mit.edu can be resolved by NS: usw2.akam.net
The name mit.edu can be resolved by NS: asia1.akam.net
The name mit.edu can be resolved by NS: asia2.akam.net
The name mit.edu can be resolved by NS: use2.akam.net
The name mit.edu can be resolved by NS: ns1-37.akam.net
The name mit.edu can be resolved by NS: ns1-173.akam.net
The name mit.edu can be resolved by NS: eur5.akam.net
The name mit.edu can be resolved by NS: use5.akam.net
The name usw2.akam.net resolves to IP addr: 184.26.161.64
The name asia1.akam.net resolves to IP addr: 95.100.175.64
The name asia2.akam.net resolves to IP addr: 95.101.36.64
The name use2.akam.net resolves to IP addr: 96.7.49.64
The name ns1-37.akam.net resolves to IP addr: 193.108.91.37
Ignoring IPv6 record
The name ns1-173.akam.net resolves to IP addr: 193.108.91.173
Ignoring IPv6 record
The name eur5.akam.net resolves to IP addr: 23.74.25.64
The name use5.akam.net resolves to IP addr: 2.16.40.64
Ignoring IPv6 record
Resolving auth-ns0.csail.mit.edu using server 23.74.25.64
The name csail.mit.edu can be resolved by NS: auth-ns1.csail.mit.edu
The name csail.mit.edu can be resolved by NS: auth-ns2.csail.mit.edu
The name csail.mit.edu can be resolved by NS: auth-ns0.csail.mit.edu
The name csail.mit.edu can be resolved by NS: auth-ns3.csail.mit.edu
The name auth-ns0.csail.mit.edu resolves to IP addr: 128.30.2.123
The name auth-ns1.csail.mit.edu resolves to IP addr: 18.24.0.120
The name auth-ns2.csail.mit.edu resolves to IP addr: 128.52.32.80
The name auth-ns3.csail.mit.edu resolves to IP addr: 128.52.32.80
Resolving auth-ns0.csail.mit.edu using server 128.52.32.80
The name auth-ns0.csail.mit.edu resolves to IP addr: 128.30.2.123
No A record for server auth-ns3.csail.mit.edu, asking root servers.
Resolving auth-ns3.csail.mit.edu using server 192.58.128.30
The name edu can be resolved by NS: a.edu-servers.net
The name edu can be resolved by NS: c.edu-servers.net
The name edu can be resolved by NS: d.edu-servers.net
The name edu can be resolved by NS: f.edu-servers.net
The name edu can be resolved by NS: g.edu-servers.net
The name edu can be resolved by NS: l.edu-servers.net
The name a.edu-servers.net resolves to IP addr: 192.5.6.30
The name c.edu-servers.net resolves to IP addr: 192.26.92.30
The name d.edu-servers.net resolves to IP addr: 192.31.80.30
The name f.edu-servers.net resolves to IP addr: 192.35.51.30
The name g.edu-servers.net resolves to IP addr: 192.42.93.30
The name l.edu-servers.net resolves to IP addr: 192.41.162.30
Ignoring IPv6 record
Resolving auth-ns3.csail.mit.edu using server 192.42.93.30
The name mit.edu can be resolved by NS: usw2.akam.net
The name mit.edu can be resolved by NS: asia1.akam.net
The name mit.edu can be resolved by NS: asia2.akam.net
The name mit.edu can be resolved by NS: use2.akam.net
The name mit.edu can be resolved by NS: ns1-37.akam.net
The name mit.edu can be resolved by NS: ns1-173.akam.net
The name mit.edu can be resolved by NS: eur5.akam.net
The name mit.edu can be resolved by NS: use5.akam.net
The name usw2.akam.net resolves to IP addr: 184.26.161.64
The name asia1.akam.net resolves to IP addr: 95.100.175.64
The name asia2.akam.net resolves to IP addr: 95.101.36.64
The name use2.akam.net resolves to IP addr: 96.7.49.64
The name ns1-37.akam.net resolves to IP addr: 193.108.91.37
Ignoring IPv6 record
The name ns1-173.akam.net resolves to IP addr: 193.108.91.173
Ignoring IPv6 record
The name eur5.akam.net resolves to IP addr: 23.74.25.64
The name use5.akam.net resolves to IP addr: 2.16.40.64
Ignoring IPv6 record
Resolving auth-ns3.csail.mit.edu using server 23.74.25.64
The name csail.mit.edu can be resolved by NS: auth-ns1.csail.mit.edu
The name csail.mit.edu can be resolved by NS: auth-ns2.csail.mit.edu
The name csail.mit.edu can be resolved by NS: auth-ns3.csail.mit.edu
The name csail.mit.edu can be resolved by NS: auth-ns0.csail.mit.edu
The name auth-ns0.csail.mit.edu resolves to IP addr: 128.30.2.123
The name auth-ns1.csail.mit.edu resolves to IP addr: 18.24.0.120
The name auth-ns2.csail.mit.edu resolves to IP addr: 128.52.32.80
The name auth-ns3.csail.mit.edu resolves to IP addr: 128.52.32.80
Resolving auth-ns3.csail.mit.edu using server 128.52.32.80
The name auth-ns3.csail.mit.edu resolves to IP addr: 128.52.32.80
Resolving 128.30.76.78 using server 128.52.32.80
128.30.76.78 resolves to golf.csail.mit.edu`
To submit this assignment, add hw4 directory and put same files as the template, but update hw4.c with your code. We will use make to compile your code and that should produce binary file named hw4.
This homework is due at October 17, Monday, 11 pm.
Grading will be done automatically using a script. We will publish this script after grading has completed.
IMPORTANT: We will check for last word in the last line of the program output during grading, as shown in the example above. Please make sure you conform to this output.