November 2006

  • Reducing costs and generating revenue with network monitoring

    Like most IT managers, you have a lot on your plate, and improving network monitoring is only one of the tasks you need to address. This article will discuss business-focused ROI around a network m...08 Nov 2006

  • Why an Apple notebook might be the only one to drop

    When there's an Apple notebook in the mix of connected wireless PCs that keeps dropping connection, our wireless networking expert, Lisa Phifer, can tell you what's going on and how to solve this i...08 Nov 2006

  • NAC appliances: Shortcut to access control

    Many network managers are interested in NAC, but a full-blown installation requires a large commitment and investment. To fill the gap between consumer interest and investment, several vendors offe...07 Nov 2006

  • NAC and endpoint security frameworks: Which way to go?

    We've all heard about the Cisco and Microsoft initiatives for NAC, plus the standards-based Trusted Network Connect. What's the difference between these approaches and which, if any, should you cho...07 Nov 2006

  • Network access control -- More than endpoint security

    Network access control (NAC) holds a great deal of promise for network security, but sorting out the market and product options is a challenge. In this special report, you'll learn how to gauge if ...07 Nov 2006

  • How long does CCNP certification last?

    It's difficult to keep up-to-date on recertification, but here, our Cisco Training expert, David Minutella, lets us know how long our CCNP certification lasts.06 Nov 2006

  • wideband

    Wideband is a transmission medium or channel that has a wider bandwidth than one voice channel (with a carrier wave of a certain modulated frequency).06 Nov 2006

  • WATS (wide-area telephone service)

    WATS (wide-area telephone service) is a specialized form of fixed-rate long-distance telecommunication service.06 Nov 2006

  • Ethernet

    Ethernet is the most widely-installed local area network ( LAN) technology.06 Nov 2006

  • TDMA (time division multiple access)

    TDMA (time division multiple access) is a technology used in digital cellular telephone communication that divides each cellular channel into three time slots in order to increase the amount of dat...06 Nov 2006

  • out-of-band signaling

    Out-of-band signaling is telecommunication signaling (exchange of information in order to control a telephone call) that is done on a channel that is dedicated for the purpose and separate from the...06 Nov 2006

  • E-carrier system

    To see the relationship between the E-carrier system, the T-carrier system, and DS0 multiples, see digital signal X. E1 (or E- is a European digital transmission format devised by the ITU-TS and gi...06 Nov 2006

  • committed information rate (CIR)

    committed information rate06 Nov 2006

  • digital loop carrier (DLC)

    DLC also is an abbreviation for Data Link Control.06 Nov 2006

  • 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.06 Nov 2006

  • microwave

    The term microwave refers to electromagnetic energy having a frequency higher than 1 gigahertz (billions of cycles per second), corresponding to wavelength shorter than 30 centimeters.06 Nov 2006

  • in-band signaling

    In the public switched telephone network, (PSTN), in-band signaling is the exchange of signaling (call control) information on the same channel that the telephone call itself is using.06 Nov 2006

  • baseband

    Describes a telecommunication system in which information is carried in digital form on a single unmultiplexed signal channel on the transmission medium.06 Nov 2006

  • band

    In telecommunication, a band - sometimes called a frequency band - is a specific range of frequencies in the radio frequency (RF) spectrum, which is divided among ranges from very low frequencies (...06 Nov 2006

  • broadband voice gateway

    A broadband voice gateway is a device that allows you to make telephone calls over a high-speed Internet connection rather than through a regular telephone outlet without having to go through your ...06 Nov 2006