Network Performance Management

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  • carrier-to-noise ratio (CNR or C/N)

    In communications, the carrier-to-noise ratio, often written CNR or C/N, is a measure of the received carrier strength relative to the strength of the received noise.  Definition

  • maximum transmission unit (MTU)

    A maximum transmission unit (MTU) is the largest size packet or frame, specified in octets (eight-bit bytes), that can be sent in a packet- or frame-based network such as the Internet.  Definition

  • maximum segment size (MSS)

    The maximum segment size (MSS) is the largest amount of data, specified in bytes, that a computer or communications device can handle in a single, unfragmented piece.  Definition

  • network analyzer (protocol analyzer or packet analyzer)

    A network analyzer is a combination of hardware and programming, or in some cases a stand-alone hardware device, that can be installed in a computer or network to enhance protection against malicious activity... (Continued)  Definition

  • fault management

    Fault management is the component of network management concerned with detecting, isolating and resolving problems... (Continued)  Definition

  • Logical Link Control layer (LCL layer)

    The Logical Link Control (LCL) layer is one of two sublayers of the Data-Link layer in the Open Systems Interconnection (OSI) model of communication. The LCL layer is concerned with managing traffic (flow and error control) over the physical medium....  Definition

  • wire speed

    Wire speed refers to the rate of data transfer a given telecommunication technology provides at the physical wire level.  Definition

  • Jini

    Jini (pronounced "GEE-nee" like the Arabic word for "magician") is a network architecture concept that Sun Microsystems calls "spontaneous networking." Using Jini, users will be able to plug printers, storage devices, speakers or any kind of device ...  Definition

  • jam

    In an Ethernet network, a jam is a signal from one device to all other devices that a collision has occurred. Specifically, the device was trying to send a frame while another device was also trying to put a frame on the line.  Definition

  • jabber (in networks)

    In networks, a jabber is any device that is handling electrical signals improperly, usually with negative results for the rest of the network.  Definition

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