Quantum Scalar i40 User Manual page 392

Glossary
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physical media types supported by Fibre Channel, such as
optical fiber, twisted pair, and coaxial cable.
Firewall A set of security tools designed to separate an internal
network from the public Internet in order to keep unauthorized
users out of a restricted network. Firewalls are the primary line
of security defense for businesses.
FL_Port Fabric Loop Port. An F_Port that is capable of supporting an
attached Fibre Channel Arbitrated Loop. An FL_Port on a loop
will have the AL_PA hex'00' giving the fabric the highest priority
access to the loop. N_Ports or NL_Ports can attach to it in an
Arbitrated Loop topology and are capable of communicating
with FC-AL protocol.
FRU (Field Replaceable Unit) The smallest hardware component that
can be replaced at a customer installation by a certified field
service representative.
GUI (Graphical User Interface) A computer environment that
provides a visual view of a system by incorporating windows,
icons, menus, and a pointing device. Also referred to as a
Windows, Icons, Mouse, and Pointers (WIMP) interface.
HDD (High Density Drive) A drive that contains increased storage
capacity of bits and/or tracks per square inch.
Home position Accessor axes positioned at 0 vertical and 0 horizontal,
that serve as the point of reference for the position of other
library components. Home position is used as a basis for
calibration.
Host In general, a host is a computer or program that contains data
and provides services to other computers or devices. In Fibre
Channel terms, a host is a computer that initiates contact with
storage devices.
Hot swappable The ability to replace a defective component while the
system continues to function normally.
HTTP (Hypertext Transfer Protocol) The communication rules by
which a Web browser (client) and a server delivering Web pages
exchange information.
Quantum Scalar i40 and Scalar i80 User's Guide