Networking Definitions

  • A

    ATM (asynchronous transfer mode)

    ATM (asynchronous transfer mode) is a dedicated-connection switching technology that organizes digital data into 53-byte cell units and transmits them over a physical medium using digital signal technology.

  • attenuation

    Attenuation is a general term that refers to any reduction in the strength of a signal.

  • attenuation-to-crosstalk ratio (ACR) or headroom

    Attenuation-to-crosstalk ratio (ACR), also called headroom, is the difference, expressed as a figure in decibels (dB), between the signal attenuation produced by a wire or cable transmission medium and the near-end crosstalk (NEXT).

  • ATU-R (ADSL Terminal Unit - Remote)

    An ATU-R (ADSL Terminal Unit - Remote), sometimes called an "ADSL modem," is a hardware unit that is installed in any computer that uses a telephone company connection with Asymmetric Digital Subscriber Line (ADSL) service.

  • audible ring

    In a telephone system, an audible ring is the tone that is returned from the called party's switching device and heard by the caller. This tone indicates to the caller that the desired party is being rung.

  • Audiobook: Intrusion Prevention Fundamentals

    Intrusion Prevention Fundamentals: An introduction to network attack mitigation with IPS

  • AUI (attachment unit interface)

    The AUI (attachment unit interface) is the 15-pin physical connector interface between a computer's network interface card (NIC) and an Ethernet cable.

  • autofax

    Autofax is the automatic (computer-initiated) sending of a facsimile (fax) message over a network in one of two ways: ( to a receiving computer or fax machine that is always ready to receive and store or immediately print such transmissions or (2), in some cases, as an e-mail note.

  • automatic repeat request (ARQ)

    Automatic repeat request (ARQ) is a protocol for error control in data transmission.

  • autonomous system (AS)

    On the Internet, an autonomous system (AS) is the unit of router policy, either a single network or a group of networks that is controlled by a common network administrator (or group of administrators) on behalf of a single administrative entity (such as a university, a business enterprise, or a business division).

  • autotrunking

    Autotrunking is a function that can be activated for one or more switch ports in a Cisco system of virtual local area networks (VLANs), making those ports capable of carrying traffic for any or all of the VLANs accessible by a particular switch....

  • availability

    1) In a telephone circuit, availability is the ratio between the time during which the circuit is operational and elapsed time. 2) In a network switching system, availability is the accessibility of input and output ports.

  • average bouncing busy hour (ABBH)

    In designing and assessing telephone networks, one approach is to measure the average bouncing busy hour (ABBH) traffic in various network trunks or trunk groups of the network.

  • B

    B-channel (bearer channel)

    In the Integrated Services Digital Network (ISDN), the B-channel is the channel that carries the main data.

  • B8ZS (bipolar 8-zero substitution, binary 8-zero substitution, clear channel, clear 64)

    B8ZS (bipolar 8-zero substitution, also called binary 8-zero substitution, clear channel, and clear 64) is an encoding method used on T1 circuits that inserts two successive ones of the same voltage - referred to as a bipolar violation - into a signal whenever eight consecutive zeros are transmitted.

-ADS BY GOOGLE

SearchSDN

SearchEnterpriseWAN

SearchUnifiedCommunications

SearchMobileComputing

SearchDataCenter

SearchITChannel

Close