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Glossary–42 edge switch 2/16 service manual
Glossary
protective plug
In a fiber-optic environment, a type of duplex connector (or cover) that provides physical
protection (D). Contrast with loopback plug.
protocol
(1) Set of semantic and syntactic rules that determines the behavior of functional units in
achieving communication. (2) In systems network architecture, the meanings of and
sequencing rules for requests and responses for managing the network, transferring data, and
synchronizing network component states. (3) A specification for the format and relative timing
of data exchanged between communicating devices (D, I).
.public device
A loop device that can transmit a fabric login command (FLOGI) to a switch, receive
acknowledgement from the switch’s login server, register with the switch’s name server, and
communicate with fabric-attached devices. Public devices communicate with fabric-attached
devices through the switch’s bridge port (B_Port) connection to a director or switch. Contrast
with private device.
pull-down menu
See drop-down menu.
PWA
See printed wiring assembly.
R
radio frequency interference
RFI. Electromagnetic radiation which is emitted by electrical circuits carrying rapidly
changing signals, as a by-product of the normal operation, and which causes unwanted signals
(interference or noise) to be induced in other circuits.
RAM
See random access memory.
random access memory
RAM. A group of computer memory locations that is numerically identified to allow
high-speed access by the controlling microprocessor. A memory location is randomly accessed
by referring to its numerical identifier (D). Contrast with read-only memory. See also dynamic
random access memory; nonvolatile random access memory; static random access memory.
R_A_TOV
See resource allocation time-out value.