60
6193-5201
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. Higher-level protocols, such as SPX and NCP,
are used for additional error recovery services. Sequenced
Packet Exchange, SPX, a transport layer protocol (layer 4 of the
OSI Model) used in Novell Netware networks. The SPX layer
sits on top of the IPX layer (layer 3) and provides connection-
oriented services between two nodes on the network. SPX is
used primarily by client/server applications.
ISA
A type of internal computer bus that allows the addition of
card-based components like modems and network adapters. ISA
has been replaced by PCI and is not very common anymore.
ISDN
A type of broadband Internet connection that provides digital
service from the customer’s premises to the dial-up telephone
network. ISDN uses standard POTS copper wiring to deliver
voice, data or video.
ISO Network Model A network model developed by the International Standards
Organization (ISO) that consists of seven different levels,
or layers. By standardizing these layers, and the interfaces in
between, different portions of a given protocol can be modified
or changed as technologies advance or systems requirements
are altered. The seven layers are: Physical, Data Link, Network,
Transport, Session, Presentation, Application.
LAN
A system of connecting PCs and other devices within the same
physical proximity for sharing resources such as an Internet
connections, printers, files and drives.
Receive Sensitivity
The minimum signal strength required to pick up a signal. Higher
bandwidth connections have less receive sensitivity than lower
bandwidth connections.
Router
A device that forwards data from one WLAN or wired local
area network to another.
SNR
Signal to Noise Ratio. The number of decibels difference
between the signal strength and background noise.
Transmit Power
The power usually expressed in mW or db that the wireless
device transmits at.