C-2
Glossary
ThinWire Ethernet (IEEE 802.3 10BASE2) uses BNC connectors.
Bridge
A network "relay" which reads, buffers and sends data to relay it from one
data link to another. A bridge makes the two connected data links appear as
one link to all higher data link layer levels.
Broadcast
A message (e.g. packet or frame) sent to all the nodes on a network.
Broadcast Address
An address that can be used as the destination of a communication that
indicates the packet/message is a broadcast. IP has broadcast addresses, as
does IEEE 802.
Broadcast Domain
The part of a network that receives the same broadcasts.
Category 3 Unshielded Twisted Pair (UTP)
Standardization of unshielded twisted pair cable for voice use. Some data
communications standards such as 10BASE-T can utilize it.
Category 4 Unshielded Twisted Pair (UTP)
Standardization of unshielded twisted pair cable.
Category 5 Unshielded Twisted Pair
Standardization of unshielded twisted pair cable for data use. TP-PMD
requires Category 5 cable rather than Category 3.
Coaxial Cable
Any of a number of kinds of electrical communications cable designed so
one conductor is in the center and the second conductor forms a ring around
it. Some well known kinds are various Cable TV cables, cables used by IBM
327x terminals and ARCNet and cables used by Ethernet & IEEE 802.3.
Collapsed Backbone
A network backbone that is located in a single room. It might be a single
router or multiport bridge or a small LAN of some sort. A typical collapsed
backbone style campus LAN might consist of Ethernets in a number of
buildings, each with a repeated fiber link into a single room at a central point
where a router interconnects them. An example of the opposite would be
putting a router in each building and interconnecting them all with a big
FDDI ring.
