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Glossary
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ThickLAN
A local area network (LAN) operating over 10-mm diameter coaxial LAN cable.
Agilent ThickLAN networks are compatible with the IEEE 802.3 Type 10Base5
standard.
Token
A short frame that circulates over the ring until captured by a station that wants to
transmit a message. Tokens have a specific format as defined by the Token-Ring
standard.
Token-Ring
A LAN developed by IBM Corporation. Token-Ring transmits at 4 Mbit or 16
Mbit per second.
Token-Ring Cable
The MsAU cable used to connect devices to the Token-Ring network. This cable
connects a MsAU network port to either the RJ-45 or DB-9 probe port.
Topology
The organization of network devices in a network. FDDI uses a ring topology,
Ethernet uses a bus Topology, and Token-Ring uses a ring topology.
UTP (Unshielded Twisted Pair)
A cable that is twisted in pairs. Pair twisting reduces crosstalk by canceling the
magnetic fields generated in each of the twisted wires.
Vertical Redundancy Check (VRC)
A technique for error checking in the data stream where each character plus parity
is used to calculate for errors (similar to LRC).
Virtual Circuit
An end-to-end logical connection of users without specific paths defined. It is not
a direct connection, but a logical communication path. The Frame Relay and X.25
technique of routing user data through the network.
Vp (nominal Velocity of Propagation)
The speed that a pulse travels along a given cable. Vp is expressed as a percentage
of the speed of light in a vacuum.