Network management Definitions

  • P

    policy-based networking

    Policy-based networking is the management of a network so that various kinds of traffic - data, voice, and video - get the priority of availability and bandwidth needed to serve the network's users effectively.

  • port mirroring (roving analysis port)

    Port mirroring is an approach to monitoring network traffic that involves forwarding a copy of each packet from one network switch port to another.

  • propagation delay

    Propagation delay, symbolized tpd, is the time required for a digital signal to travel from the input(s) of a logic gate to the output.

  • protocol-independent multicast (PIM)

    Protocol-independent multicast (PIM) is a set of four specifications that define modes of Internet multicasting to allow one-to-many and many-to-many transmission of information... (Continued)

  • Q

    queries-per-second (QPS)

    Queries-per-second (QPS) (or the query-per-second rate) is a measure of how much traffic a particular query server is handling at a given time.

  • R

    response time

    According to the IBM Dictionary of Computing (which cites International Organization for Standardization Information Technology Vocabulary as the source), response time is: The elapsed time between the end of an inquiry or demand on a computer system and the beginning of a response; for example, the length of the time between an indication of the end of an inquiry and the display of the first character of the response at a user terminal.

  • round-trip time (RTT)

    Round-trip time (RTT), also called round-trip delay, is the time required for a signal pulse or packet to travel from a specific source to a specific destination and back again...(Continued)

  • S

    shortest path bridging

    Shortest path bridging, or 802.1aq, is the IEEE’s specification for enabling multi-pathing in the data center. Shortest path bridging is similar conceptually to its IETF counterpart, Transparent Interconnection of Lots of Links (TRILL).

  • signal-to-noise ratio (S/N or SNR)

    In analog and digital communications, signal-to-noise ratio is a measure of signal strength relative to background noise. This ratio is usually measured in decibels.

  • sniffer

    In common industry usage, a sniffer (with lower case "s") is a program that monitors and analyzes network traffic, detecting bottlenecks and problems.

  • software-defined networking monitoring application (SDN monitoring application)

    An SDN monitoring application is a software program that oversees the traffic in a software-defined network (SDN) as a component of network management.

  • source quench

    Using the Internet Control Message Protocol (ICMP), a source quench is a message from one host computer to another telling it to reduce the pace at which it is sending packet to that host.

  • Source Quench Introduced Delay (SQuID)

    Also see SQUID, a UNIX-based program for caching Web pages and other Internet content closer to the user.

  • T

    TCP/IP offload engine (TOE)

    The TCP/IP offload engine (TOE for short) is a technology that is gaining popularity in high-speed Ethernet systems for the purpose of optimizing throughput.

  • telco (telephone company)

    In the United States and possibly other countries, "telco" is a short form for telephone company.

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