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N
ETWORKING
T
ERMINOLOGY
A
Network
is a collection of workstations (for example,
IBM-compatible PCs) and other equipment (for example,
printers), connected for the purpose of exchanging
information or sharing resources. Networks vary in size,
some are within a single room, others span continents.
A
Local Area Network (LAN)
is a network, usually in an
office, that spans no more than a single site.
Ethernet
is a type of LAN, referring to the technology used
to pass information around the network. It operates at
10Mbps (megabits per second).
10BASE-T
is the name given to the Ethernet protocol that
runs over
Twisted Pair (TP)
cable at 10Mbps. The
OfficeConnect hub uses RJ-45 type connectors for
connecting your TP network
10BASE-2
is the name given to the Ethernet protocol that
runs over
Coaxial
cable.
A
Network Loop
occurs when two pieces of network
equipment are connected by more than one path. Your hub
detects this and
partitions
(isolates) one of its ports to
break the loop.
A
segment
is the length of cable connected to a port,
whether this cable is 10BASE-T, 10BASE-2 (Coaxial), or
another type. When you daisy-chain equipment together
with 10BASE-2 (Coaxial) cable, via single speed hubs, the
entire cable forms a single segment.
Packets
are the units of information your workstations and
other equipment send to each other over the network.
Collisions
are a part of normal Ethernet operation and
occur if two or more devices (pieces of network equipment)
attempt to transmit at the same time. A sudden sustained
increase in the number of collisions can indicate a problem
with a device, particularly if it is not accompanied by a
general increase in traffic. On coaxial segments an increase
in collisions can also indicate faulty cabling.
3C16702.book Page 16 Tuesday, July 13, 1999 10:16 AM