HP StorageWorks SAN Switch 2/32 Installation Manual page 104

Glossary
Topology
As applies to Fibre Channel, the configuration of the Fibre Channel network and the resulting
communication paths allowed. There are three possible topologies:
• Point to point - A direct link between two communication ports.
• Switched fabric - Multiple N_Ports linked to a switch by F_Ports.
• Arbitrated loop - Multiple NL_Ports connected in a loop.
Transfer State
The state in which a port can establish circuits with multiple ports without reentering the
arbitration cycle for each circuit. This state can only be accessed by an L_Port in the Open
state.
Translative Mode
A mode in which private devices can communicate with public devices across the fabric.
Transmission Character
A 10-bit character encoded according to the rules of the 8B/10B algorithm.
Transmission Word
A group of four transmission characters.
Trap (SNMP)
The message sent by an SNMP agent to inform the SNMP management station of a critical
error.
Tunneling
A technique for enabling two networks to communicate when the source and destination hosts
are both on the same type of network, but are connected by a different type of network.
U_Port
Universal Port; a switch port that can operate as a G_Port, E_Port, F_Port, or FL_Port. A port
is defined as a U_Port when it is not connected or has not yet assumed a specific function in
the fabric.
UDP
User Datagram Protocol; a protocol that runs on top of IP and provides port multiplexing for
upper-level protocols.
Glossary–12 SAN switch 2/32 version 4.0.x installation guide