CertiGuide to Network+  9  Chapter 0101:  TCP/IP       9  V  Name Resolution

Name Services 1 DNS Configuration

The main name service, DNS (Domain Name Service or Domain Name System) is used throughout the Internet. Unlike HOSTS, it is hierarchical. This means that more than one level of name resolution is involved.

The successive levels denote more and more specific areas of authority, going from most general (and widest authority) in the rightmost component of the name, to most specific in the leftmost component.

Microsoft.com is an example of a 2^nd level domain. At the 1^st level is the (usually) primary domain suffix, usually three letters after the dot (.).

A registration for having a 2^nd level domain is done through InterNIC (Internet Network Information Center). While domains are registered on a first come, first served basis, the authority reserves the right to revoke ownership if is a violation of another firms trademark. Most recently, InterNIC revoked a number of registrations based on the fact that ‘squatters’ registered many thousands of names from one person. This speculation is forbidden.

Name Services 1 DNS Configuration