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Glossary
GL-4
Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
E
eiBGP
External and Internal Border Gateway Protocol.
encapsulation
The technique used by layered protocols in which a layer adds header information to the protocol data
unit (PDU) from the layer above.
Ethernet
One of the most common local area network (LAN) wiring schemes, Ethernet has a transmission rate
of 10, 100, or 1000 Mbps.
F
Fast switching
Cisco feature whereby a route cache is used to expedite packet switching through a router.
FCC
Federal Communications Commission. A U.S. government agency that regulates interstate and foreign
communications. The FCC sets rates for communication services.
FTP
File Transfer Protocol. The Internet protocol used to transfer files between hosts.
G
GE
Gigabit Ethernet.
GRE
Generic Route Encapsulation. A method of encapsulating any network protocol in another protocol.
H
high VC count
Also called high VC mode. A technique used to optimize processes for session scaling.
HGW
Home Gateway. Also known as L2TP Network Server (LNS) in L2TP contexts.
hop count
A measure of distance between two points on the Internet. It is equivalent to the number of gateways
that separate the source and destination.
HTML
Hypertext Markup Language. The page-coding language for the World Wide Web.
http
Hypertext Transfer Protocol. The protocol used to carry world-wide web (www) traffic between a www
browser computer and the www server being accessed.
I
ICMP
Internet Control Message Protocol. The protocol used to handle errors and control messages at the IP
layer. ICMP is actually part of the IP protocol.