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  • attenuation

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

  • ADSL (Asymmetric Digital Subscriber Line)

    Also see Fast Guide to DSL. ADSL (Asymmetric Digital Subscriber Line) is a technology for transmitting digital information at a high bandwidth on existing phone lines to homes and businesses.  Definition

  • System engineer vs. network administrator

    Our Cisco certifications expert, David Minutella, answers what the responsibilities of a system engineer and network administrator are and what makes the two jobs different.  Ask the Expert

  • mesh network

    A mesh network is a local area network (LAN) that employs one of two connection arrangements, full mesh topology or partial mesh topology.  Definition

  • STUN (Simple Traversal of UDP through NAT)

    Simple Traversal of UDP through NAT (STUN) is a protocol that governs the exchange of data over a User Datagram Protocol (UDP) connection by communications devices operating behind a Network Address Translator (NAT) or firewall... (Continued)  Definition

  • Network test plan: Checklist for architecture changes

    For every change you make to your network architecture, you should have a test plan and a backout plan. In this tip, learn how to build a test plan and review a sample checklist of things to include.  Tip

  • What good network monitoring tools are there to run on Windows servers?

    Michael Gregg offers excellent resources for network monitoring tools in this Q&A.  Ask the Expert

  • wavelength

    Wavelength is the distancebetween identical points in the adjacent cycles of a waveform signal propogated in space or along a wire, as shown in the illustration.  Definition

  • What to do when your server goes down

    When a server goes down at a particular time every night without the prompt of a virus, our expert, Puneet Mehta, can tell you what the problem is and what you can do to avoid it.  Ask the Expert

  • networking

    In information technology, networking is the construction, design, and use of a network.  Definition

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