Glossary
GL-9
Cisco 6260 Hardware Installation Guide
OL-2365-02
authentication
In security, the verification of the identity of a person or a process.
autodiscovery
The process by which a network device automatically searches through a range of network addresses
and discovers the known types of devices that are present. Also see
subrack
discovery
.
automatic
protection
switching
See
APS
.
available bit rate
See
ABR
.
AWG
American Wire Gauge. The standard gauge for measurement of thickness of a wire in the United States.
B
backplane
The physical connection between an interface processor or card and the data buses and the power
distribution buses inside a DSLAM.
bandwidth
The difference between the highest and lowest frequencies available for network signals. The term
also is used to describe the rated throughput capacity of a given network medium or protocol. For a
digital channel, this is defined in bits. For an analog channel, it depends on the type and method of
modulation used to encode the data.
bandwidth on
demand
The ability of a user to dynamically set upstream and downstream line speeds to a particular rate
of speed.
BITS
building integrated timing supply. A clock in a CO that supplies DS1 or composite clock timing
references to all synchronous network elements in that office.
bits per second
See
bps
.
bootflash
Separate Flash memory device used primarily to store the Cisco IOS boot image, operational
Cisco IOS images, and system configuration information.
BOOTP
Bootstrap Protocol. The protocol used by a network node to determine the IP address of its Ethernet
interfaces to affect network booting.
Bootstrap Protocol
See
BOOTP
.
bps
bits per second. A standard measurement of digital transmission speeds.
bridge
A device that connects two or more physical networks and forwards packets between them. Bridges
can usually be made to filter packets, that is, to forward only certain traffic. See
switch
and
router
.
broadband
In telecommunications, any channel having a bandwidth greater than a voice-grade channel (4 kHz).
broadband remote
access server
Device that terminates remote users at the corporate network or Internet users at the internet service
provider (ISP) network that provides firewall, authentication, and routing services for remote users.
broadcast
Data packet that are sent to all nodes on a network. Broadcasts are identified by a broadcast address.
Compare with
multicast
and
unicast
.
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Страница 208: ...B 8 Cisco 6260 Hardware Installation Guide OL 2365 02 Appendix B Port Mapping Specifications Standard Telco Color Chart ...
Страница 214: ...C 6 Cisco 6260 Hardware Installation Guide OL 2365 02 Appendix C Connector and Pinout Specifications Ethernet Port ...