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ANA-5910/5930/5940 User’s Guide
Glossary-6
Ethernet
An industry standard (Project
802.3 of the IEEE) that specifies
protocols for connection and
transmission in local area
networks. As a media access
method, it operates at layers 1
and 2 in the OSI model. Ethernet
transmits at 10 Mbits/sec.
G
Gateway
1. The original term for what is
now called router or more
precisely IP router. A gateway
connects two different types of
communication networks
together. It performs the
protocol conversion from one
network to the other.
2. A communications link
between a local area network
and a mainframe or mini-
computer.
H
HEC
Header Error Control. The HEC
field is an 8-bit CRC computed
on all fields in an ATM header
and is capable of detecting
single-bit and certain multiple-
bit errors.
Hub
A device that allows a network
to be lengthened or expanded
with additional nodes.
I
IEEE
Institute of Electrical and
Electronics Engineers.
Professional organization that
defines some network
standards, such as Ethernet.
ILMI
Interim Local Management
Interface. The standard
specification used to manage an
ATM network. The ILMI uses
the SNMP protocol and an ATM
UNI MIB to provide the
administrator with status and
configuration information.
INARP
What RFC 1577 calls RARP.
Internetwork
Two or more networks
connected by bridges or routers
(or both).
IP
Internet Protocol. Associated
with TCP, a set of
communication protocols
developed to internetwork
dissimilar systems. The TCP
protocol controls the transfer of
the data (performing at the
equivalent of layer 4 in the OSI
model) and the IP protocol
provides the routing
mechanism (performing at the
equivalent to layer 3 in the OSI
model).
IP Address
An identifier for a node,
expressed as four fields 1-byte