Cisco Systems OL-7426-03 quick start Ike, Ipx-Spx

IEEE 802.11

A set of specifications for LANs from The Institute of Electrical and Electronics Engineers (IEEE). Most wired networks conform to 802.3, the specification for CSMA/CD based Ethernet networks or 802.5, the specification for token ring networks. 802.11 defines the standard for wireless LANs encompassing three incompatible (non-interoperable) technologies: Frequency Hopping Spread Spectrum (FHSS), Direct Sequence Spread Spectrum (DSSS) and Infrared. See also 802.11, 802.11a, 802.11b, 802.11g and 802.1X. See also WECA.

IKE

Internet Key Exchange. A protocol used to start, stop and monitor IPSec dynamic tunnels.

iLink

Sony's term for IEEE1394 technology that provides a bandwidth of about 400 Mbps. Many people also refer to this high-speed communication technology using Apple's original term, FireWire. Future versions of 1394 will greatly increase the bandwidth.

Infrastructure Mode

A client setting providing connectivity to an AP. As compared to Ad-Hoc mode, whereby PCs communi- cate directly with each other, clients set in Infrastructure Mode all pass data through a central AP. The AP not only mediates wireless network traffic in the immediate neighborhood, but also provides communication with the wired network. See Ad-Hoc and AP.

Internet Appliance

A computer that is intended primarily for Internet access, is simple to set up and usually does not support installation of third-party software. These computers generally offer customized web browsing, touch-screen navigation, email services, entertainment and personal information management applica- tions. An Internet appliance can be Wi-Fi enabled or it can be connected via a cable to the local network.

IP

Internet Protocol. A set of rules used to send and receive messages at the Internet address level.

IP Address

A 32-bit number that identifies each sender or receiver of information that is sent across the Internet. An IP Address has two parts: an identifier of a particular network on the Internet and an identifier of the particular device (which can be a server or a workstation) within that network.

IP Telephony

Internet Protocol Technology that supports voice, data and video transmission via IP-based LANs, WANs, and the Internet. This includes VoIP (Voice over IP).

IPSec

IP Security. Protocol used to authenticate and/or encrypt IP data using IPSec and/or IKE secure tunnels. Used to support VPN tunnels across the internet.

IPSec Passthrough

Operating System Security feature that allows IPSec-equipped clients to communicate directly with other IPSec equipment.

IPX-SPX

IPX, short for Internetwork Packet Exchange, a networking protocol used by the Novell NetWare operating systems. Like UDP/IP, IPX is a datagram protocol used for connectionless communications.

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