Nokia Network Voyager, Reference Manual

Page: 685 / 700

Voyager Reference Guide 687
T1
A transmission rate . An AT&T term for a formatted digital signal, level-1
being transmitted at a rate of 1.544 Mbytes using 24 discrete channels.
TCP/IP
Transmission Control Protocol/Internet Protocol. A suite of Internet
protocols. Separately, they are defined as:
TCP - Transmission Control Protocol . A protocol that ensures that
connections are made and maintained, which allows a process running on one
computer to send a data stream to another computer. TCP is a reliable, full-
duplex, connection-oriented transport (verifying connection) service. TCP
works with IP to move packets through an inter-network.
IP - Internet Protocol part of the TCP/IP protocol that defines the IP
datagram as the unit of information passed on a network. IP includes the
Internet Control Message Protocol.
TRPB
Truncated Reverse-Path Broadcasting. An algorithm used by multicast
routing protocols to determine the group memberships on each leaf of a
subnetwork, which avoids forwarding datagrams onto a leaf subnetwork that
does not have a member of the destination group. Prunes multicast
distribution trees to a minimum.
TTL
Time to Live. The time allowed before an endlessly looping packet is
discarded. TTL was originally intended to be a measure of the time in seconds
a datagram was allowed to be in transit across a network. In practice,
however, datagrams traverse routers in less than a second, so usage was
changed. Now as a datagram is forwarded, its TTL is decrements by one.
Thus, TTL actually represents the maximum number of Hops that a datagram
can make before being discarded.