For example, given a device with a local hostname of myhost and a default parent domain name of example.com, the fully qualified domain name is myhost.example.com. It therefore uniquely defines the device — whilst there might be many hosts in the world called myhost, there can only be one myhost.example.com.
There are situations in specific implementations of the Domain Name System, in which, for technical reasons, a fully qualified domain name must end with a full stop (dot), indicating the DNS root zone. This ensures that the name is intended to be fully qualified. For example myhost.bar.com could be ambiguous, as it may be just a hostname within another higher level domain, and because not all resolvers assume that domain names containing a dot are absolute. myhost.bar.com., with the dot appended, is an unambigous fully qualified domain name. In most practical uses, the trailing dot is not required.
The qualified offer: the taxpayer's 90-day letter: although rarely used, a qualified offer under sec. 7430 can be an effective way to speed up the process of resolving a tax issue with the IRS.
May 01, 2008; EXECUTIVE SUMMARY * If the IRS does not accept a taxpayer's qualified offer and the judgment awarded to the government is...