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15 | Terminology
10BaseT - Physical Layer Specification for Twisted-Pair Ethernet using Unshielded
Twisted Pair wire at 10Mbps. This is the most popular type of LAN cable used
today because it is very cheap and easy to install. It uses RJ-45 connectors and
has a cable length span of up to 100 meters. There are two versions, STP
(Shielded Twisted Pair) which is more expensive and UTP (Unshielded Twisted
Pair), the most popular cable. These cables come in 5 different categories.
However, only 3 are normally used in LANs, Category 3, 4 and 5. CAT 3 TP
(Twisted Pair) cable has a network data transfer rate of up to 10Mbps. CAT 4 TP
cable has a network data transfer rate of up to 16Mbps. CAT 5 TP cable has a
network data transfer rate of up to 100Mbps.
Access Point - A device that is able to receive wireless signals and transmit them
to the wired network, and vice versa - thereby creating a connection between
the wireless and wired networks.
Ad Hoc - An ad hoc wireless LAN is a group of computers, each with LAN
adapters, connected as an independent wireless LAN.
Adapter - A device used to connect end-user nodes to the network; each
contains an interface to a specific type of computer or system bus, e.g. EISA,
ISA, PCI, PCMCIA, CardBus, etc.
Auto-Negotiation - A signaling method that allows each node to define its
operational mode (e.g., 10/100 Mbps and half/full duplex) and to detect the
operational mode of the adjacent node.
Backbone
- The core infrastructure of a network. The portion of the network that
transports information from one central location to another central location
where it is unloaded onto a local system.
Base Station - In mobile telecommunications, a base station is the central radio
transmitter/receiver that maintains communications with the mobile
radiotelephone sets within its range. In cellular and personal communications
applications, each cell or micro-cell has its own base station; each base station in
turn is interconnected with other cells' bases.
BSS
- BSS stands for "Basic Service Set". It is an Access Point and all the LAN
PCs that are associated with it.
CSMA/CA
- Carrier Sense Multiple Access with Collision Avoidance