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

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.
32
value.
private loop.
Directors and Edge Switches Glossary