CCNA Cisco Certified Network Associate Study Guide - FTP Server

676 Glossary
failure domain The region in which a failure has occurred in a Token Ring.
When a station gains information that a serious problem, such as a cable
break, has occurred with the network, it sends a beacon frame that includes
the station reporting the failure, its NAUN, and everything between. This
defines the failure domain. Beaconing then initiates the procedure known as
autoreconfiguration. See also: autoreconfiguration and beacon.
fallback In ATM networks, this mechanism is used for scouting a path if
it isn’t possible to locate one using customary methods. The device relaxes
requirements for certain characteristics, such as delay, in an attempt to find
a path that meets a certain set of the most important requirements.
Fast Ethernet Any Ethernet specification with a speed of 100Mbps. Fast
Ethernet is ten times faster than 10BaseT, while retaining qualities like MAC
mechanisms, MTU, and frame format. These similarities make it possible for
existing 10BaseT applications and management tools to be used on Fast
Ethernet networks. Fast Ethernet is based on an extension of IEEE 802.3
specification (IEEE 802.3u). Compare with: Ethernet. See also: 100BaseT,
100BaseTX, and IEEE.
fast switching A Cisco feature that uses a route cache to speed packet
switching through a router. Contrast with: process switching.
FDM Frequency-Division Multiplexing: A technique that permits information
from several channels to be assigned bandwidth on one wire based on
frequency. See also: TDM, ATDM, and statistical multiplexing.
FDDI Fiber Distributed Data Interface: An LAN standard, defined by
ANSI X3T9.5 that can run at speeds up to 200Mbps and uses token-passing
media access on fiber-optic cable. For redundancy, FDDI can use a dual-ring
architecture.
FECN Forward Explicit Congestion Notification: A bit set by a Frame
Relay network that informs the DTE receptor that congestion was encountered
along the path from source to destination. A device receiving frames
with the FECN bit set can ask higher-priority protocols to take flow-control
action as needed. See also: BECN.
FEIP Fast Ethernet Interface Processor: An interface processor employed
on Cisco 7000 series routers, supporting up to two 100Mbps 100BaseT
ports.