IBM 8239 Token-Ring Stackable Hub, Setup And User Manual

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M
MAC. Imedium access control.
Management Information Base (MIB). (1) A
collection of objects that can be accessed by means of
a network management protocol. (2) A definition for
management information that specifies the information
available from a host or gateway and the operations
allowed. (3) In OSI, the conceptual repository of
management information within an open system.
management station. In Internet communications, the
system responsible for managing all, or a portion of, a
network. The management station communicates with
network management agents that reside in the
managed node by means of a network management
protocol, such as the Simple Network Management
Protocol (SNMP).
markup language. An application-oriented language
designed to transform raw text into structured
documents by inserting procedural and descriptive
markup into the raw text. Examples of markup
languages are HTML, DCF, PAGE, SCRIBE, SCRIPT,
and SGML.
mask. (1) A pattern of characters used to control
retention or elimination of portions of another pattern of
characters. (I) (A) (2) To use a pattern of characters to
control retention or elimination of portions of another
pattern of characters. (I) (A)
Medium Access Control (MAC). The sublayer of DLC
that supports medium-dependent functions and uses the
services of the physical layer to provide services to
Logical Link Control (LLC).
modem (modulator/demodulator). (1) A functional
unit that modulates and demodulates signals. One of
the functions of a modem is to enable digital data to be
transmitted over analog transmission facilities. (T) (A)
(2) A device that converts digital data from a computer
to an analog signal that can be transmitted on a
telecommunication line, and converts the analog signal
received to data for the computer.
N
network interface card (NIC)). The point of
interconnection between the public switched network
and a privately owned terminal.
O
out-of-band. The ability to manage the 8239 by
attaching the device to the EIA-232 interface on the
stack unit. The data does not go across the data
network.
P
packet internet groper (PING). A program used in
TCP/IP networks to test the ability to reach destinations
by sending the destinations an Internet Control
Message Protocol (ICMP) echo request and waiting for
a reply.
phantom voltage. A DC voltage superimposed on a
Token-Ring signal; it is used to signal a Token-Ring
concentrator that a station is ready to be inserted into
the ring.
R
REM. Ring Error Monitor.
remote. (1) Pertaining to a system, program, or device
that is accessed through a telecommunication line.
(2) Synonym for
link-attached. (3) Contrast with local.
ring error monitor (REM). A function of the token-ring
manager that observes, collects, and analyzes
recoverable and irrecoverable error reports sent by
token-ring stations on a single token-ring network and
assists in fault isolation and correction.
Ring Parameter Server (RPS). This function resides
on each ring for which operational parameters are being
managed. It sends initialization information to new
stations attaching to the ring, makes sure that stations
on the ring have consistent values for operational
parameters, and forwards registration information to
LAN managers from stations attaching to the ring.
RPS. Ring Parameter Server.
S
server. A functional unit that provides shared services
to workstations over a network; for example, a file
server, a print server, a mail server. (T)
Simple Network Management Protocol (SNMP). In
the Internet suite of protocols, a network management
protocol that is used to monitor routers and attached
networks. SNMP is an application layer protocol.
Information on devices managed is defined and stored
in the application's Management Information Base
(MIB).
Glossary
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