F (DNS)

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

fault tolerance

Method of ensuring a network or computer system is resistant to software or hardware failures.

flat name space

An unpartitioned name space, in which each entry must be unique. Flat name spaces do not scale well, due to the requirement that each entry be unique.

forwarder

A DNS Server that has been designated to handle communication with offsite DNS Servers.

Fully Qualified Domain Name (FQDN)

A name that uniquely identifies a host in the DNS hierarchy, such that a host called server1 in the products hierarchy at Microsoft may have an FQDN of server1.products.Microsoft.com.