System information

Glossary
g-25
Glossary
field-replaceable unit FRU. Assembly removed and replaced in its entirety when any one of
its components fails (D).
file server A computer that stores data centrally for network users and manages
access to that data.
file transfer protocol FTP. A transmission control protocol/Internet protocol (TCP/IP)
-based client/server protocol used to transfer files to and from a
remote host. Does not perform any conversion or translation.
firewall A networking device that blocks unauthorized access to all or parts of
a network.
firewall zoning Hardware enforced access between F_Ports enforced at the source
port. The hardware verifies the destination port against the zone
defined for the source port.
firmware Embedded program code that resides and runs on, for example,
directors, switches, and hubs.
FLASH memory Reusable nonvolatile memory that is organized as segments for
writing, and as bytes or words for reading. FLASH memory is faster
than read-only memory, but slower than random access memory (D).
FLOGI See fabric login command.
FL_Port See fabric loop port.
FPM See fibre port module.
F_Port See fabric port.
frame A variable-length packet of data that is transmitted in frame relay
technology.
FRU See field-replaceable unit.
FTP See file transfer protocol.
full-duplex The capability to transmit in two directions simultaneously.