Josh References Glossary B

back door
A usually hidden or secret means for an external user to break into your host, network, application, or data. See also virus.

A copy of disk files stored on tape or on another physical disk to prevent permanent data loss. The act of copying disk files to tape or other distinct physical media to prevent permanent data loss.

Backup Domain Controller (BDC)
The server that contains a backup copy of the account database from the Primary Domain Controller (PDC). Used for authentication purposes.

Backward Explicit Congestion Notification (BECN)
A bit in the Frame Relay header that is set when the network router detects congestion from the source direction (or "backward," from the packet's point of view). See also Forward Explicit Congestion Notification (FECN).

Basic Object Adapter (BOA)
Invokes the performance of a request and returns any results to the client. Also called simply adapter.

The Integrated Services Digital Network (ISDN) channel that carries voice and user data.

See Backup Domain Controller (BDC).

bearer channel
See B-channel.

See Backward Explicit Congestion Notification (BECN).

Berkeley Internet Name Daemon (BIND)
An implementation of the DNS protocol. Internet name service software, originally written at the University of California at Berkeley and now maintained by the Internet Software Consortium. Distribution includes /usr/sbin/named and sample configuration files.

See Border Gateway Protocol (BGP).

big six
The top level domains (TLD) other than .int.

See Berkeley Internet Name Daemon (BIND).

A logical connection between a client process and a server process.

A unit of disk space containing one or more frags. See frag.

See Basic Object Adapter (BOA).

Boot Protocol (BOOTP)
The protocol that defines how a diskless workstation obtains its network address from another host. NeXT workstations also use BOOTP when booted to determine their NetInfo information. Defined in RFC 951 and extended by RFC 2132. See also Dynamic Host Configuration Protocol (DHCP).

See Boot Protocol (BOOTP).

Border Gateway Protocol (BGP)
A protocol, defined in RFC 1163 and later refined in RFC 1771, that allows the exchange of packets between networks, such as a company intranet and the Internet.

Networking hardware that connects two network segments into one logical segment.

One host broadcasts when it wants every machine (typically on a LAN) to receive the packet or information. See also anycast, multicast, unicast.