HP 316095-B21 - StorageWorks Edge Switch 2/24 Manual page 38

Glossary
token
A sequence of bits passed from one device to another on a token ring network that signifies
permission to transmit over the network. The token consists of a starting delimiter, access
control field, and end delimiter. If a device has data to transmit, it appends the data to the token.
token ring
A local area network (LAN) configuration where devices attach to a network cable in a closed
path or ring. A token (unique sequence of bits) circulates on the ring to allow devices to access
the LAN for data transmission (D). See also
token ring controller adapter card
TKRG. The circuit card that provides a port to connect a director or switch to a 4/16 Mbps
token ring local area network (LAN).
topology
Logical and/or physical arrangement of stations on a network.
transceiver modules
Transceiver modules come in longwave, extra longwave, or shortwave laser versions, providing
a single fiber connection.
transfer rate
The speed with which data can be transmitted from one device to another. Data rates are often
measures in megabits (Mbps) or megabytes (MBps) per second, or gigabits per second (Gbps)
or gigabytes per second (GBps).
trap recipient
In SNMP, a network management station that receives messages for configured events that
occur at a managed director or switch.
Underwriters Laboratories
UL. A laboratory organization accredited by the Occupational Safety and Health
Administration and authorized to certify products for use in the home and workplace (D).
upper level protocol
A protocol that maps to and runs on top of the Fibre Channel through the FC-4 layer. Examples
of upper level protocols include Internet protocol (IP) and small computer system interface
(SCSI).
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.
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ring topology.
Directors and Edge Switches Glossary