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This is the bearer channel in an ISDN connection. B channel is a 64 Kbps full-duplex channel

in both primary and basic rate ISDN.

A deliberately planned security breach in a program that allows special access to a computer or program.

Back Pressure flow control is typically used with Ethernet ports operating in half duplex mode

to send a "collision" signal to the sending port (mimicking a state of packet collision) causing the

sending port to temporarily stop sending signals and resume sending them later.

A high-speed line or series of connections that forms a major pathway within a network.

BackOrifice is a remote administration tool that allows a user to control a computer across

a TCP/IP connection using a simple console or GUI application.

Each VDSL mode operates in a different frequency range called a band plan.

This is the capacity of a link usually measured in bits-per-second (bps).

A class may use bandwidth from another class if that class is not using up its current

allocation and bandwidth borrowing is allowed.

A bandwidth class defines bandwidth allowed at an interface for an application, such as

VoIP (Voice over Internet Protocol) or FTP (File Transfer Protocol) and/or a subnetwork.

Bandwidth control means defining a maximum allowable bandwidth for traffic flows from

specified source(s) to specified destination(s). See also Bandwidth Management.

Links refers to traffic flow between the device port interfaces.

Bandwidth management allows you to allocate bandwidth at an interface according to defined policies.

Bandwidth management lite uses firewall rules to limit bandwidth on traffic flows.

This is a graphical interface that allows you to gauge bandwidth usage.

A bandwidth policy is where you define what application(s) and/or subnetworks make up a bandwidth class.

This allows you to dynamically set upstream and downstream line speeds to a particular rate of speed.

This is a networking technology that uses a line's entire available bandwidth to transfer a single

signal of digital data. Signals are not modulated and only one kind of signal (voice or data) can be sent at a time.

This is an ANSI described rule for the encoding of data units. It also refers to the ratio of bits received

that are in error. See Bit Error Rate Test.

This is an ISDN interface that has two B (bearer) channels that carry voice or data and one

16 Kbps D (data) channel. Also called Basic Rate Access (BRA).

A billing profile is a template of predefined billing parameters such as time unit, unit cost and/or account expiration time.

Binary PKCS#7 is a standard that defines the general syntax for data (including digital signatures) that may be encrypted.

Binary X.509 is an ITU-T recommendation that defines the formats for X.509 certificates.

A Binary Digit (either a one or a zero); a single digit number in base-2. A bit is the smallest unit of computerized data.

This test shows the ratio of error bits to the total number of bits transmitted. Generally

written as an exponential (10^5) to show that one out of a particular number of bits is in error.

Broadband Loop Emulation Service (Voice over DSL, TR-039 Annex A) is a DSL forum

standard that provides architectural requirements and recommendations for using the Loop

Emulation Standard (see LES) to deploy voice services on a DSL broadband access network.

Boot Module Commands, available in the debug mode via SMT (some devices may not have SMTs),

help you initialize the configuration of the basic functions and features of your device(s) such

as uploading firmware, changing the console port speed and viewing product-related information.

This is a technology that a network uses to determine its Ethernet interface's IP address.

Borrowing priority determines which class gets to borrow bandwidth when two or more

classes are vying for spare bandwidth.

This is a standard measurement of digital transmission speeds.

This is a standard measurement of digital transmission speeds. One byte is eight bits.

This is an ISDN interface that has two B (bearer) channels that carry voice or data and

one 16 Kbps D (data) channel. Also called Basic Rate Interface.

This is a networking device that forwards packets from one LAN to another. It uses

the MAC address of an incoming packet to determine whether to drop or forward it.

It allows the LANs to see each other's devices, thus it is not as private or secure as a router.

An AP in bridge mode can function as a wireless network bridge allowing you to connect

two wired network segments. The peer device also must be in bridge mode. This wireless bridge

connection is equivalent to a Wireless Distribution System (WDS). See also WDS.

STP uses bridge priority to determine the root device, root port and designated port. The device

with the highest priority becomes the STP root device. If all devices have the same priority, the

device with the lowest MAC address will then become the root device.

Bridging provides LAN to LAN frame forwarding services between two or more LANs. Frames

from one LAN are forwarded across a bridge to a connected LAN, although filtering can be

employed to selectively forward frames.

Broadband refers to networking technologies that use modulation or multiplexing to combine

multiple channels for transmission over a single medium (copper telephone wire for instance).

Broadband allows you to integrate data, video and voice so that it can share one line.

Sending data to all computers on a network.

A broadcast storm occurs when a packet triggers multiple responses from all hosts on a network or when

computers attempt to respond to a host that never replies. As a result, duplicated packets are continuously

created and circulated in the network, thus reducing network performance or even rendering it inoperable.

Broadcast Storm Control limits the number of broadcast frames that can be stored in the switch

buffer or sent out from the switch within a certain time. Broadcast frames that arrive when the

buffer is full are discarded.

A technique used to find passwords or encryption keys. Brute Force Hacking involves trying

every possible combination of letters, numbers, etc., until the code is broken.

This is a protection mechanism to discourage brute-force password guessing attacks on the

router management interfaces. Brute-force password guessing is repeatedly trying different

combinations of letters, numbers and so on until the password is found. Brute-Force Password

Guessing Protection enforces a wait-time after a certain number of incorrect passwords have

been entered. This wait-time must expire before another password can be entered.

See Ad-Hoc

A set of bits that represents a single character. There are eight bits in a byte.