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  • NAK (negative acknowledgment or not acknowledged)

    NAK is an abbreviation for negative acknowledgment or not acknowledged. 

  • X.25

    The X.25 protocol, adopted as a standard by the Consultative Committee for International Telegraph and Telephone (CCITT), is a commonly-used network protocol. 

  • What is network latency?

    Learn what network latency is in this expert response. 

  • Is going from one Web site to another a download?

    Learn what the true definition of a download is and whether going from one Web site to another falls under this category in this Q&A with Amy Kucharik. 

  • connectionless

    In telecommunication, connectionless describes communication between two network end points in which a message can be sent from one end point to another without prior arrangement. 

  • circuit-switched

    Circuit-switched is a type of network in which a physical path is obtained for and dedicated to a single connection between two end-points in the network for the duration of the connection. 

  • duplex

    In telecommunication, duplex communication means that both ends of the communication can send and receive signals at the same time. 

  • dumb network

    A dumb network is one that provides the physical interconnection between nodes but not much processing to support signaling. 

  • SDH (Synchronous Digital Hierarchy)

    SDH (Synchronous Digital Hierarchy) is a standard technology for synchronous data transmission on optical media. 

  • What is the difference between online backup and offline backup?

    What is the difference between online backup and offline backup? Find out from SearchNetworking.com's networking help desk expert, Amy Kucharik.