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Driver
Software that enables a computer to interact with a network or other device. For example, there are
drivers for printers, monitors, graphics adapters, modems, Ethernet, USB, and many others.
DSL
Digital Subscriber Line
DSSS
Direct-Sequence Spread Spectrum. DSSS is a transmission technology used in WLAN transmissions
where a data signal at the sending station is combined with a higher data rate bit sequence, or chipping
code, that divides the user data according to a spreading ratio. The chipping code is a redundant bit
pattern for each bit that is transmitted, which increases the signal's resistance to interference. If one or
more bits in the pattern are damaged during transmission, the original data can be recovered due to the
redundancy of the transmission.
Dynamic IP Address
An IP address that is temporarily leased to a host by a DHCP server. The opposite of Static IP Address.
E
ESS
An Extended Service Set (ESS) is a set of two or more BSSs that form a single subnetwork. See also
BSS.
Ethernet
The most widely used LAN type, also known as IEEE 802.3. The most common Ethernet networks are
10Base-T, which provide transmission speeds up to 10 Mbps, usually over unshielded, twisted-pair wire
terminated with RJ-45 connectors. Fast Ethernet (100Base-T) provides speeds up to 100 Mbps. .Base.
means .baseband technology. and .T. means .twisted pair cable. Each Ethernet port has a physical
address called the MAC address. Also see MAC address.
Event
A message generated by a device to inform an operator or the network management system that
something has occurred.
F
Firmware
Code written onto read-only memory (ROM) or programmable read-only memory (PROM). Once firmware
has been written onto the ROM or PROM, it is retained even when the device is turned off. Firmware is
typically upgradeable.
FTP
File Transfer Protocol is a standard Internet protocol for exchanging files between computers. FTP is
commonly used to download programs and other files to a computer from web pages on Internet servers.
G
Gateway
A device that enables communication between networks using different protocols. See also router.
GUI
Graphical User Interface