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Here is the ANSWER SECTION when I run dig www.google.com:
;; ANSWER SECTION: www.google.com. 108 IN A 74.125.239.115 www.google.com. 108 IN A 74.125.239.114 www.google.com. 108 IN A 74.125.239.116 www.google.com. 108 IN A 74.125.239.113 www.google.com. 108 IN A 74.125.239.112 I think the first field contains the URL and the second field contains the port number. I am not sure about the third and fourth fields. I think the fifth field contains the IP address.
I've reviewed http://www.madboa.com/geek/dig/ and https://kb.mediatemple.net/questions/909/Understanding+the+dig+command, and am still unsure what each section represents.
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The “ANSWER” section provides us with an answer to our question. As we already mentioned, by default dig will request the A record. Here, we can see that the domain linux.org points to the 104.18. 59.123 IP address.
The Additional Section provides any extra information that may be wanted but not specifically requested by dig. In this example, the Additional Section displays the IP addresses of the authoritative nameservers. Another example of a common lookup using dig would be to look up the mx, mail exchange, record for a domain.
The dig command in Linux is used to gather DNS information. It stands for Domain Information Groper, and it collects data about Domain Name Servers. The dig command is helpful for troubleshooting DNS problems, but is also used to display DNS information.
Reference: http://www.zytrax.com/books/dns/ch15/#answer and http://www.zytrax.com/books/dns/ch8/a.html
The first field is the NAME: The domain name being returned
The second field (108 in your example) is the TTL in seconds.
IN is the CLASS. Here, IN stands for Internet.
A is the TYPE. Here, A stands for mapping a domain name to an IPv4 address.
The last field is of course the IP Address.
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