IBM Cloud Object Storage System Slicestor 2212..., Руководство по обслуживанию и ремонту

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along the transmission medium. When the token has
data appended to it, it becomes a frame.
token ring. (1) According to IEEE 802.5, network
technology that controls media access by passing a
token (special packet or frame) between media-attached
stations. (2) A FDDI or IEEE 802.5 network with a ring
topology that passes tokens from one attaching ring
station (node) to another. (3) See also
local area
network (LAN).
Transmission Control Protocol (TCP). A
communications protocol used in Internet and in any
network that follows the U.S. Department of Defense
standards for internetwork protocol. TCP provides a
reliable host-to-host protocol between hosts in
packet-switched communications networks and in
interconnected systems of such networks. It assumes
that the Internet protocol is the underlying protocol.
Transmission Control Protocol/Internet Protocol
(TCP/IP). A set of communications protocols that
support peer-to-peer connectivity functions for both local
and wide area networks.
Transmission Control Protocol/Internet Protocol
(TCP/IP). A set of communication protocols that
support peer-to-peer connectivity functions for both local
and wide area networks.
transparent bridging. In LANs, a method for tying
individual local area networks together through the
medium access control (MAC) level. A transparent
bridge stores the tables that contain MAC addresses so
that frames seen by the bridge can be forwarded to
another LAN if the tables indicate to do so.
Trivial File Transfer Protocol (TFTP). In the Internet
suite of protocols, a protocol for file transfer that
requires minimal overhead and minimal capability. TFTP
uses the connectionless datagram delivery services of
the User Datagram Protocol (UDP), which allows hosts
that have no disk storage to implement TFTP in
read-only memory (ROM) and use it to boot
themselves.
U
UDP. User Datagram Protocol.
UNI. User network interface (protocol).
UTP. Unshielded twisted pair.
V
V ac. Volts alternating current.
V.24. In data communications, a specification of the
CCITT that defines the list of definitions for interchange
circuits between data terminal equipment (DTE) and
data circuit-terminating equipment (DCE).
V.25. In data communications, a specification of the
CCITT that defines the automatic answering equipment
and parallel automatic calling equipment on the General
Switched Telephone Network, including procedures for
disabling of echo controlled devices for both manually
and automatically established calls.
V.34. In data communications, an ITU-T standard
model serial line protocol using signalling rates of up to
28 800 bps for use on the general switched telephone
network and on leased point-to-point 2-wire
telephone-type circuits.
V.35. In data communications, a specification of the
CCITT that defines the list of definitions for interchange
circuits between data terminal equipment (DTE) and
data circuit-terminating equipment (DCE) at various data
rates.
V.36. In data communications, a specification of the
CCITT that defines the list of definitions for interchange
circuits between data terminal equipment (DTE) and
data circuit-terminating equipment (DCE) at rates of 48,
56, 64, or 72 kilobits per second.
version. A separately licensed program that usually
has significant new code or new function.
virtual circuit. (1) In packet switching, the facilities
provided by a network that give the appearance to the
user of an actual connection. (T) See also
data circuit.
Contrast with
physical circuit. (2) A logical connection
established between two DTEs.
virtual connection. In frame relay, the return path of a
potential connection.
VoFR. Voice over Frame Relay.
VPD. Vital product data.
W
WAN. Wide area network.
wide area network (WAN). (1) A network that
provides communication services to a geographic area
larger than that served by a local area network or a
metropolitan area network, and that may use or provide
public communication facilities. (T) (2) A data
Glossary
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