OSI/TS SCF Reference Manual

Glossary
OSI/TS SCF Reference Manual—424832-001
Glossary-4
ITU
Transmission Control Protocol/Internet Protocol (TCP/IP); the two protocols are similar
but not identical. The OSI Internet protocol defines communications in the Network
Layer.
ITU. See International Telecommunications Union–Telecommunications (ITU–T)
.
layer. There are seven layers in the Open Systems Interconnection (OSI) Reference Model
:
Application Layer
, Data Link Layer, Network Layer, Physical Layer, Presentation
Layer, Session Layer, and Transport Layer.
link access protocol - balanced (LAP-B). International Telecommunications Union–
Telecommunications (ITU–T) standards that define in the Data Link Layer the
requirements for X.25 connections over wide area networks (WANs).
local address. The terms local address and remote address refer to the two endpoints of a
connection. A local address is the address of the end system
that is considered local with
respect to the user.
Management Information Base (MIB). A database used by the Open Systems
Interconnection (OSI) manager process to store and retrieve configuration information
and information about applications..
Multilan Access Method (MLAM). The input/output process (IOP) that is part of the
Tandem LAN Access Method (TLAM) product.
network service provider (NSP) process. A process in the Open Systems Interconnection
(OSI) subsystem that performs service and protocol functions for the Network Layer
and, for local area networks (LANs), some functions of the Data Link Layer. NSP
processes are provided by the underlying X.25 Access Method (X25AM), Tandem LAN
Access Method (TLAM), NonStop TCP/IP, or Port Access Method (PAM) subsystems.
Network Layer. Layer 3 in the Open Systems Interconnection (OSI) Reference Model
. This
layer routes data by establishing, maintaining, and terminating communications between
nodes. It sets up the most economical path, both physical and logical, between
communicating nodes; routes messages through intervening nodes to their destinations;
and controls the flow of messages between nodes.
network service access point (NSAP). The logical point at which network service provider
(NSP) process services are provided by the Network Layer entity to the Transport Layer
entity. See also network service access point (NSAP) address.
network service access point (NSAP) address. The global, network-unique address of an
end system’s network service access point, through which network service provider
(NSP) process services are provided.
network service provider (NSP) process. A process in the Open Systems Interconnection
(OSI) subsystem that performs service and protocol functions for the network service
provider (NSP) process and, for local area networks (LANs) some functions of the Data
Link Layer. NSP processes are provided by the underlying X.25 Access Method