August 2006

  • Cellular data convergence: An introduction to wireless and 3G

    The world of wireless data capabilities on the carrier networks is seeing a tremendous amount of growth as it relates to standards and service offerings. In this tip, Robbie Harrell sorts out the a...16 Aug 2006

  • Wireless security boost for laptops outside the office

    Most companies do a pretty good job with wireless security within the office walls, but what happens when end users take their laptops home -- or to Starbucks?15 Aug 2006

  • asynchronous

    In general, asynchronous (pronounced "ay-SIHN-kro-nuhs," from Greek "asyn," meaning "not with," and "chronos," meaning "time") is an adjective describing objects or events that are not coordinated ...14 Aug 2006

  • asymmetric communications

    In telecommunications, the term asymmetric (also asymmetrical or non-symmetrical) refers to any system in which the data speed or quantity differs in one direction as compared with the other direct...14 Aug 2006

  • DARPANET

    DARPANET (or DARPANet) is a term sometimes used for the ARPANET, the early network from which today's Internet evolved.14 Aug 2006

  • Application layer

    In the Open Systems Interconnection (OSI) communications model, the application layer provides services for an application program to ensure that effective communication with another application pr...14 Aug 2006

  • Appleshare

    The AppleShare protocol is a communications protocol from Apple Computer that allows client applications in a computer to exchange files with and request services from server programs in a computer...14 Aug 2006

  • APPC (Advanced Program-to-Program Communication or LU 6.2)

    APPC (Advanced Program-to-Program Communication, sometimes called LU 6.2) is a communication protocol and programming interface standard that operates in the presentation layer and the session laye...14 Aug 2006

  • anycast

    In Internet Protocol Version 6 (IPv6), anycast is communication between a single sender and the nearest of several receivers in a group. The term exists in contradistinction to multicast, communic...14 Aug 2006

  • mail user agent (MUA)

    A mail user agent (MUA) is a program that allows you to receive and send e-mail messages; it's usually just called an e-mail program.12 Aug 2006

  • MAE

    A MAE (pronounced MAY), originally an abbreviation for Metropolitan Area Exchange and now a service mark of MCI WorldCom, is a major center in the United States for interconnecting traffic between ...12 Aug 2006

  • M2M (machine-to-machine)

    M2M is an abbreviation for machine-to-machine, or technology that supports wired or wireless communication between machines.12 Aug 2006

  • Network engineering overview: Technology

    Network engineering requires a firm grasp of technology. This overview covers frameworks, standards and products. This tip is the first in a four-part series on things network engineers need to kno...11 Aug 2006

  • Network Defenders

    The mission of our Network Defenders series is to provide user stories in which networks were breached or broken by a security threat, and then later fixed with various technology solutions that im...09 Aug 2006

  • Possible Cisco zero-day exploit revealed at Black Hat

    Details of an alleged flaw related to SIP and PIX appliances, briefly mentioned in a Wednesday Black Hat presentation, are being kept under wraps as Cisco and US-CERT investigate.08 Aug 2006

  • Choosing an optimal data center site

    This chapter explains how to choose an appropriate location for your data center, from the hazards you should avoid to the physical attributes you want.08 Aug 2006

  • Logical Link Control layer (LCL layer)

    The Logical Link Control (LCL) layer is one of two sublayers of the Data-Link layer in the Open Systems Interconnection (OSI) model of communication. The LCL layer is concerned with managing traff...07 Aug 2006

  • collision

    In a half duplex Ethernet network, a collision is the result of two devices on the same network attempting to transmit data at exactly the same time.07 Aug 2006

  • wire speed

    Wire speed refers to the rate of data transfer a given telecommunication technology provides at the physical wire level.07 Aug 2006

  • TCP (Transmission Control Protocol)

    TCP (Transmission Control Protocol) is a set of rules (protocol) used along with the Internet Protocol (IP) to send data in the form of message units between computers over the Internet.07 Aug 2006