Cabletron Systems SmartSwitch 6000 User Manual page 408

LLC
LLC2
Logical Channel
Logical DCE/DTE
LP
LPDU
M
MAC
M-Bit
N
Network
NMVT
Node
Glossary-6
stands for "logical link control," which is the third layer in the three-layer ISO LAN
protocol hierarchy. (The first two layers are Physical and MAC; MAC is described in
this glossary.) LLC is responsible for addressing and data link control.
is a type of LLC that requires establishment of a connection before information can be
exchanged. (The other type of LLC is LLC1, which does not require a connection.)
is a logical link between node and subscriber, on which calls are sent or received. The
physical line between devices may have a number of logical channels (also called
LCNs).
see "DCE" and "DTE."
stands for "line processor."
stands for "LLC protocol data unit," which is the unit of information exchanged
between link stations in different nodes. The LPDU consists of destination service
access point (see "DSAP") and source service access point (see "SSAP") address
fields, a control field, and (optionally) information fields.
stands for "medium access control," which is the second layer in the three-layer ISO
LAN protocol hierarchy. (The first layer is Physical and the third is LLC; LLC is
described in this glossary.) MAC supports medium-dependent functions, and uses the
services of the physical layer to provide services to LLC.
is the "more data" bit in an X.25 packet, and indicates that more information related
to the packet will follow.
is a series of points connected by communications channels.
stands for "network management vector transport," which is an IBM service encoding
used in sessions between a control point and a PU (physical unit).
is a physical device that acts as a transfer point for data between endpoints of a
physical/logical connection. FRXs and FRMs are often referred to as nodes.
FRX/FRM 3.3 User Guide, Rev 04