Subdomains and Delegation
In Chapter 1, I discussed the importance of delegation of domains from root server to TLD server to subdomain and possibly even subdomain of that again, as in the case of ifi.uio.no. In practice, delegation is quite simple.
penguin.bv wants to open new offices on the other side of the island, and it decides to delegate a DNS domain for that office. The domain will be called emperor.penguin.bv and reside on a DNS server at the Emperor office. The Emperor office has been assigned the net at 192.168.56.0 through 192.168.56.127 and the subnet mask is 255.255.255.128. This is called a classless net because it's divided not on an octet boundary as is customary, but within an octet. You can read more about the reasons for ...
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