TCP/IP Illustrated, Volume 1: The Protocols by Stevens W. Richard & Fall Kevin R

Author:Stevens, W. Richard & Fall, Kevin R. [Fall, Kevin R.]
Language: eng
Format: epub
Publisher: Pearson Education (USA)
Published: 2011-11-07T06:00:00+00:00

thelongestdomainnameintheworldandthensomeandthensomemoreandmore.com

was allegedly submitted as a potential world record for the longest name, with a label of length 63, but was judged to have been of insufficient merit to justify a place in the Guinness World Records.

The hierarchical structure of the DNS name space allows different administrative authorities to manage different parts of the name space. For example, creating a new DNS name of the form elevator.cs.berkeley.edu would likely require dealing with the owner of the cs.berkeley.edu subdomain only. The berkeley.edu and edu portions of the name space would not require alteration, so the owners of those would not need to be bothered. This feature of DNS is one key aspect of its scalability. That is, no single entity is required to administer all the changes for the entire DNS name space. Indeed, creating a hierarchical structure for names was one of the first responses in the Internet community to the pressures of scaling and a major motivator for the structure used today. The original Internet naming scheme was flat (i.e., no hierarchy), and a single entity was responsible for assigning, maintaining, and distributing the list of nonconflicting names. Over time, as more names were required and more changes were being made, this approach became unworkable [MD88].

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