HP 316095-B21 - StorageWorks Edge Switch 2/24 Manual - Halaman 32

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Glossary

prohibited port connection

In S/390 operating mode, an attribute that removes dynamic connectivity capability.

protective plug

In a fiber-optic environment, a type of duplex connector (or cover) that provides physical

protection (D).

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.

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.

public loop

A public loop is connected to a switched fabric (through the switch bridge port (B_Port)), and

the switch has an active embedded fabric loop port (FL_Port) that is user transparent. All

devices attached to the loop can communicate with each other, and public devices attached to

the loop can communicate with fabric-attached devices. Contrast with

R_A_TOV

See

resource allocation time-out

redundancy

Performance characteristic of a system or product whose integral components are backed up by

identical components to which operations will automatically failover in the event of a

component failure. Redundancy is a vital characteristic of virtually all high-availability (24

hours per day, seven days per week) computer systems and networks.

remote access link

Connection to a device or program on a computer network via a (geographically) remote

workstation.

remote computer running client software

Workstation, such as a personal computer (PC) or UNIX workstation, running HAFM and

Element Manager client application software that can access the server platform over a local

area network (LAN) connection.

value.

private

loop.

Directors and Edge Switches Glossary