Glossary
GL-12 Issue 1 September 1994
subnet
A portion of a network, which may be a physically independent
network segment, that shares a network address with other
portions of the network and is distinguished by a subnet number.
A subnet is to a network what a network is to an internet.
subnet address
The subnet portion of an IP address. In a subnetted network, the
host portion of an IP address is split into a subnet portion and a
host portion using an address (subnet) mask. This allows a site
to use a single IP network address for multiple physical
networks.
subnet mask
A subnet mask identifies the subnet field of a network address.
The subnet mask is a 32-bit Internet address written in
dotted-decimal notation with all the 1s in the network and subnet
portions of the address.
T
TCP
Transmission Control Protocol. An Internet standard transport
layer protocol defined in STD 7, RFC 793. It is
connection-oriented and stream-oriented.
TCP/IP
Transmission Control Protocol/Internet Protocol. TCP allows a
process on one machine to send data to a process on another
machine using the IP protocol. TCP can be used as a full-duplex
or one-way simplex connection.
TFTP
The Trivial File Transfer application is a standard TCP/IP
protocol that allows simple file transfer to and from a remote
system without directory or file listing. TFTP is used where FTP
is not available.