Wide Area Network (WAN) Definitions

  • M

    Multiprotocol Label Switching (MPLS)

    Definition: Learn what MPLS (Multiprotocol Label Switching) is and why allowing packets to be forwarded at the Layer 2 (switching) level rather than at the Layer 3 (routing) level is important for Quality of Service (QoS).

  • N

    Network Address Translation (NAT)

    A NAT (Network Address Translation or Network Address Translator) is the virtualization of Internet Protocol (IP) addresses. NAT helps improve security and decrease the number of IP addresses an organization needs.

  • O

    OSPF (Open Shortest Path First)

    The OSPF router protocol is used to find the best path for packets as they pass through a set of connected networks. OSPF is one of several Interior Gateway Protocols that replaces the Routing Information Protocol (RIP), an older routing protocol that is installed in many of today's corporate networks.

  • P

    Packet Order Correction (POC)

    Packet Order Correction (POC) is a technique for dealing with out-of-order packet delivery.

  • T

    T1 (T-1)

    Also see the T-carrier system, of which the T1 is a part.

  • tunneling or port forwarding

    Tunneling is the transmission of data intended for use only within a private, usually corporate network through a public network in such a way that the routing nodes in the public network are unaware that the transmission is part of a private network.

  • V

    virtual routing and forwarding (VRF)

    Virtual routing and forwarding (VRF) is a technology included in IP (Internet Protocol) network routers that allows multiple instances of a routing table to exist in a router and work simultaneously.

  • W

    WAN (wide area network)

    A wide area network (WAN) is a geographically distributed telecommunications network that interconnects multiple local area networks (LANs).

  • WAN accelerator

    A WAN accelerator is an appliance that improves the end user's experience on a wide area network (WAN).

  • WAN clustering (geoclustering, high-availability clustering or remote clustering)

    WAN clustering, also called geoclustering, high-availability clustering or remote clustering, is the use of multiple redundant computing resources located in different geographical locations to form what appears to be a single highly-available system.

  • WAN interface card (WIC)

    A WAN interface card, or WIC, is a specialized network interface card (NIC) that allows devices to connect to a wide area network.

  • WAN optimization (WAN acceleration)

    WAN optimization, also known as WAN acceleration, is the category of technologies and techniques used to maximize the efficiency of data flow across a wide area network (WAN).

  • Wide Area Ethernet (WAE)

    Wide Area Ethernet (WAE) or Ethernet WAN (also sometimes referred to as fiber or LAN extension service ) is a network carrier service that delivers high-speed wide area network (WAN) connectivity, utilizing Ethernet as the connection method. Positioned as an alternative to traditional wide area connections such as leased line, frame relay or T1 services, Wide Area Ethernet simplifies linking remote sites and enables bandwidth-heavy applications such as multicast video streaming.

  • wireless WAN (Wireless Wide Area Network)

    A wireless WAN is a wide area network in which separate areas of coverage or cells are connected wirelessly to provide service to a large geographic area.

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