GL-15
Cisco Router and Security Device Manager Version 2.2 User’s Guide
OL-4015-08
Glossary
interface The physical connection between a particular network and the router. The
router’s LAN interface connects to the local network that the router serves. The
router has one or more WAN interfaces that connect to the Internet.
Internet The global network which uses IP, Internet protocols. Not a LAN. See also
intranet.
intranet Intranetwork. A LAN which uses IP, and Internet protocols, such as SNMP,
FTP, and UDP. See also network, Internet.
IOS Cisco IOS software. Cisco system software that provides common functionality,
scalability, and security for all products under CiscoFusion architecture.
Cisco IOS allows centralized, integrated, and automated installation and
management of internetworks, while ensuring support for a wide variety of
protocols, media, services and platforms.
IOS IPS
IPS
Cisco IOS Intrusion Prevention System. IOS IPS compares traffic against an
extensive database of intrusion signatures, and can drop intruding packets and
take other actions based on configuration. Signatures are built in to IOS images
supporting this feature, and additional signatures can be stored in local or remote
signature files.
IP Internet Protocol. The Internet protocols are the world’s most popular
open-system (nonproprietary) protocol suite because they can be used to
communicate across any set of interconnected networks and are equally well
suited for LAN and WAN communications.
IP address IP version 4 addresses are 32 bits, or 4 bytes, in length. This address “space” is
used to designate the network number, the optional subnetwork number, and a
host number. The 32 bits are grouped into four octets (8 binary bits), r epresented
by 4 decimal numbers separated by periods or “dots.” The part of the address
used to specify the network number, the subnetwork number, and the host
number is specified by the subnet mask.