Cabletron Systems FRM User Manual - page 387
Glossary
glo-13
T
TCP
stands for “transmission control protocol,” which is the Internet standard transport
layer protocol.
Throughput Class
(sometimes abbreviated “thruput” class) reflects the line speed in bits per second.
Token Ring
is a MAC (see that entry) technique for data transmission that uses a “ring” configu-
ration of stations, and a “token” that is passed around the ring until taken by a station,
which inserts a packet, then retransmits the token.
TPAD
is an integral (to an FRM) SNA or BSC PAD connected to a terminal.
Trunk
is a physical or logical link between nodes.
V
V.35
is a CCITT standard defining a physical and electrical interface that is typically used
by high-speed digital carriers.
Virtual circuit
is an independent logical path between two subscribers of a packet switching network,
established for the purpose of exchanging data.
VTAM
stands for IBM’s “virtual telecommunications access method.”
X
X.21
is a CCITT recommendation that species the DTE/DCE interface for synchronous
operation on public data networks.
X.25
is a CCITT recommendation that specifies the DTE/DCE interface for “packet mode”
operation on public data networks.
X.3
is a CCITT recommendation that defines the service provided by an asynchronous
PAD to connect a character-mode terminal to an X.25 network.
XPAD
is an integral (to an FRM) transparent SNA PAD. It can be used to network any SNA
device that can be networked using any of the other SNA PAD types. It can be con-
sidered a fully transparent PAD for synchronous protocols; however, it is not intended
for this use, because special application programs would have to be resident on the
host.