HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual page 736

Appendix B: Glossary
Cipher Text Encrypted data.
CIR Committed Information Rate. For Frame Relay networks, the CIR is the
Circuit-Level
Gateways
Clear Text Unencrypted text.
CLEC Competitive Local Exchange Carrier. In the United States and Canada, a CLEC
CLI Command Line Interface. The interface that allows an administrator to enter
CO Central Office. The service provider's office to which a subscriber's home and
Coaxial Cable This cable consists of a center wire that is surrounded by insulation, which is
Compression The process of reducing information size or transmission bulk without
Configure To define the parameter values that allow network equipment to run in the
Console A terminal attached to a minicomputer, network device, or mainframe that is
CoS Class of Service. A method of managing traffic in a network by grouping
B-10
bandwidth that the carrier guarantees to be available for a particular PVC
under normal circumstances. Typically, the CIR is specified in the Frame Relay
SLA. See also EIR, Frame Relay, PVC, and SLA.
This type of firewall operates at the OSI Session Layer. Circuit-level gateways
monitor TCP handshakes between packets from trusted clients or servers to
untrusted hosts (and vice versa) to determine whether a requested session is
legitimate. The session is legitimate only if the SYN flags, ACK flags, and
sequence numbers involved in the TCP handshakes are logical.
is a company that competes with the already established local telephone
business by providing its own network and switching. The term distinguishes
new or potential competitors from established local exchange carriers. The
existence of CLECs arises from the Telecommunications Act of 1996, which
was intended to promote competition among both long-distance and local
phone service providers.
line commands to interact with and configure the router.
business lines are connected through the local loop. The CO has equipment
that can switch calls locally or to long-distance carrier phone offices.
encased in a grounded shield of braided wire. The shield minimizes electrical
and radio frequency interference.
affecting information content.
manner required for a particular environment.
used to configure and monitor the status of the system.
similar types of traffic together and treating each group as a class with its own
level of service priority. See also QoS.