@ IN NS dns.bob.org. @ IN NS dns2.bob.org.. $ORIGIN edu. bob IN SOA bob.org. root.bob.org. ( 2002121301 ; serial 10800 ; refresh 3600 ; retry 604800 ; expire 86400 ; default_ttl ) bob IN NS dns.bob.org. bob IN NS dns2.bob.org. $ORIGIN bob.org. localhost IN A 127.0.0.1 gateway IN A 220.127.116.11 dns IN A 18.104.22.168 dns2 IN A 22.214.171.124 bob.org. IN A 126.96.36.199 www IN CNAME bob.org.
This will set up bob.org so that there are four machines with hostnames. The gateway, which is probably a switch is sitting at 188.8.131.52. The name servers are at 184.108.40.206 and 220.127.116.11. Their names are dns.bob.org and dns2.bob.org. The last machine is the bob.org web server. This machine is at 18.104.22.168 and has two names. The real name or the CNAME is bob.org. It also has an alias www.bob.org which points to the machine with the CNAME bob.org.