Glossary
GL-6
Installing Cisco Intrusion Prevention System Appliances and Modules 5.0
78-16124-01
Fast Ethernet
Any of a number of 100-Mbps Ethernet specifications. Fast Ethernet offers a speed increase 10 times
that of the 10BaseT Ethernet specification while preserving such qualities as frame format, MAC
mechanisms, and MTU. Such similarities allow the use of existing 10BaseT applications and network
management tools on Fast Ethernet networks. Based on an extension to the IEEE 802.3 specification.
firewall
Router or access server, or several routers or access servers, designated as a buffer between any
connected public networks and a private network. A firewall router uses access lists and other methods
to ensure the security of the private network.
FLOOD engine
Detects ICMP and UDP floods directed at hosts and networks.
flooding
Traffic passing technique used by switches and bridges in which traffic received on an interface is sent
out all the interfaces of that device except the interface on which the information was received
originally.
fragment
Piece of a larger packet that has been broken down to smaller units.
fragmentation
Process of breaking a packet into smaller units when transmitting over a network medium that cannot
support the original size of the packet.
Fragment
Reassembly
Processor
See FRP.
FRP
Fragment Reassembly Processor. Reassembles fragmented IP datagrams. It is also responsible for
normalization of IP fragments when the sensor is in inline mode.
FTP
File Transfer Protocol. Application protocol, part of the TCP/IP protocol stack, used for transferring
files between network nodes. FTP is defined in RFC 959.
FTP server
File Transfer Protocol server. A server that uses the FTP protocol for transferring files between network
nodes.
full duplex
Capability for simultaneous data transmission between a sending station and a receiving station.
FWSM
Firewall Security Module. A module that can be installed in a Catalyst 6500 series switch. It uses the
shun command to block. You can configure the FWSM in either single mode or multi-mode.
G
Gigabit Ethernet
Standard for a high-speed Ethernet, approved by the IEEE (Institute of Electrical and Electronics
Engineers) 802.3z standards committee in 1996.
GMT
Greenwich Mean Time. Time zone at zero degrees longitude. Now called Coordinated Universal Time
(UTC).
H
H.225.0
An ITU standard that governs H.225.0 session establishment and packetization. H.225.0 actually
describes several different protocols: RAS, use of Q.931, and use of RTP.