IBM Nways 2216, Руководство по обслуживанию и ремонту

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Glossary
This glossary includes terms and definitions from:
¹
The IBM Dictionary of Computing (New York;
McGraw-Hill, Inc., 1994).
¹
The American National Standard Dictionary for
Information Systems, ANSI X3.172-1990, copyright
1990 by the American National Standards Institute
(ANSI). Copies may be purchased from the
American National Standards Institute, 11 West
42nd Street, New York, New York 10036.
Definitions are identified by the symbol (A) after the
definition.
¹
The Information Technology Vocabulary, developed
by Subcommittee 1, Joint Technical Committee 1, of
the International Organization for Standardization
and the International Electrotechnical Commission
(ISO/IEC JTC1/SC1). Definitions of published parts
of this vocabulary are identified by the symbol (I)
after the definition; definitions taken from draft
international standards, committee drafts, and
working papers being developed by ISO/IEC
JTC1/SC1 are identified by the symbol (T) after the
definition, indicating that final agreement has not yet
been reached among the participating National
Bodies of SC1.
¹
The Network Working Group Request for
Comments: 1208.
The following cross-references are used in this
glossary:
Contrast with: This refers to a term that has an
opposed or substantively different meaning.
Synonym for: This indicates that the term has the
same meaning as a preferred term, which is defined in
its proper place in the glossary.
Synonymous with: This is a backward reference from
a defined term to all other terms that have the same
meaning.
See: This refers the reader to multiple-word terms that
have the same last word.
See also: This refers the reader to terms that have a
related, but not synonymous, meaning.
A
A. Ampere.
ac. Alternating current.
active. (1) Operational. (2) Pertaining to a node or
device that is connected or is available for connection to
another node or device.
Advanced Peer-to-Peer Networking (APPN) network
node. A node that offers a broad range of end-user
services and that can provide the following:
¹
Distributed directory services, including registration
of its domain resources to a central directory server
¹
Topology database exchanges with other APPN
network nodes, enabling network nodes throughout
the network to select optimal routes for LU-LU
sessions based on requested classes of service
¹
Session services for its local LUs and client end
nodes
¹
Intermediate routing services within an APPN
network
agent. A system that assumes an agent role.
analog. (1) Pertaining to data consisting of
continuously variable physical quantities. (A)
(2) Contrast with
digital.
ANSI. American National Standards Institute.
AppleTalk. A network protocol developed by Apple
Computer, Inc. This protocol is used to interconnect
network devices, which can be a mixture of Apple and
non-Apple products.
APPN node. Advanced Peer-to-Peer Networking
(APPN) node.
asynchronous transfer mode (ATM). A
connection-oriented access service to transfer data,
voice, and video on broadband networks at very high
speeds. These traffic types are mixed together over the
available link bandwidth rather than being isolated into
dedicated chunks of bandwidth.
The current ATM is for speeds of 155 Mbps and 622
Mbps but it will be capable of speeds in range of
gigabits per second.
ATM divides all traffic into fixed-length cells, each
containing 48 bytes of user data and five bytes of
overhead, and manages the flow of these cells through
the network.
ATM. Asynchronous Transfer Mode.
attachment unit interface (AUI). In a local area
network, the interface between the medium attachment
unit and the data terminal equipment within a data
station. (I) (A)
AUI. Attachment unit interface.
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Copyright IBM Corp. 1997
X-1