director 2/64 service manual

Glossary–20 director 2/64 service manual

Glossary

TCP/IP

See transmission control protocol/internet protocol.

topology

Logical and/or physical arrangement of stations on a network.

transmission control protocol/internet protocol (TCP/IP)

A suite of communication protocols used to connect host systems to the Internet. See also

network address.

trap

Unsolicited notification of an event originating from an SNMP managed device and directed

to an SNMP network management station.

trap host

SNMP management workstation that is configured to receive traps.

trunk cable

Cable consisting of multiple fiber pairs that do not directly attach to an active device. This

cable usually exists between distribution panels. See also optical cable. Contrast with jumper

cable.

unblocked port

Devices attached to an unblocked port can login to the director and communicate with devices

attached to any other unblocked port.

unicast

Communication between a single sender and a single receiver over a network. Compare to

multicast and anycast (communication between any sender and the nearest of a group of

receivers).

universal port module (UPM) card

Each universal port module card provides four Fibre Channel connections through duplex

small form factor pluggable (SFP) fiber-optic transceivers. 1 or 2 gigabits per second enabled.