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.
TTCP
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.