Networking Definitions

  • C

    Constellation

    Constellation was the early name for the Communicator browser and related programs from Netscape Communications.

  • context-aware network access control

    Context-aware network access control (CANAC) is an approach to managing the security of a proprietary network by granting access to network resources according to contextual-based security policies.

  • COPS (Common Open Policy Service Protocol)

    COPS (Common Open Policy Service Protocol) is a proposed standard protocol for exchanging network policy information between a policy decision point (PDP) in a network and policy enforcement points (PEPs) as part of overall Quality of Service (QoS) - the allocation of network traffic resources according to desired priorities of service.

  • core router

    A core router is a router that forwards packets to computer hosts within a network (but not between networks).

  • corporate area network (CAN)

    A corporate area network (CAN) is a separate, protected portion of a corporation's intranet.

  • CPNI (Customer Proprietary Network Information)

    In the United States, CPNI (Customer Proprietary Network Information) is information that telecommunications services such as local, long distance, and wireless telephone companies acquire about their subscribers.

  • CRC-4 (Cyclic Redundancy Check 4)

    CRC-4 (Cyclic Redundancy Check 4) is a form of cyclic redundancy checking (a method of checking for errors in transmitted data) that is used on E-1 trunk lines.

  • cross-bar switch

    In a network, a cross-bar switch is a device that is capable of channeling data between any two devices that are attached to it up to its maximum number of ports.

  • crossover cable

    A crossover cable is a cable that is used to interconnect two computers by "crossing over" (reversing) their respective pin contacts.

  • crosstalk

    Crosstalk is a disturbance caused by the electric or magnetic fields of one telecommunication signal affecting a signal in an adjacent circuit.

  • CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance)

    CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) is a protocol for carrier transmission in 802.11 networks.

  • CSU/DSU (Channel Service Unit/Data Service Unit)

    A CSU/DSU (Channel Service Unit/Data Service Unit) is a hardware device about the size of an external modem that converts a digital data frame from the communications technology used on a local area network (LAN) into a frame appropriate to a wide-area network (WAN) and vice versa.

  • CTI (computer-telephony integration)

    CTI (computer-telephony integration), or sometimes simply "computer telephony," is the use of computers to manage telephone calls.

  • customer premises equipment (CPE)

    Customer premises equipment (CPE) is telephone or other service provider equipment that is located on the customer's premises (physical location) rather than on the provider's premises or in between.

  • cycles per second (CPS)

    Cps (cycles per second) is the measure of how frequently an alternating current changes direction.

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