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Glossary
CET
CHAP
chargen
checksum
Cisco SDM
cipher
ciphertext
CIR
class map
clear channel
cleartext
Cisco Router and Security Device Manager 2.5 User's Guide
GL-6
Cisco Encryption Technology. Proprietary network layer encryption introduced
in Cisco IOS Release 11.2. CET provides network data encryption at the IP
packet level and implements the following standards: DH, DSS, and 40- and
56-bit DES.
Challenge Handshake Authentication Protocol. Security feature supported on
lines using PPP encapsulation that prevents unauthorized access. CHAP does not
itself prevent unauthorized access, it merely identifies the remote end. The
router or access server then determines whether that user is allowed access. See
also PAP.
Character Generation. Via TCP, a service that sends a continual stream of
characters until stopped by the client. Via UDP, the server sends a random
number of characters each time the client sends a datagram.
Computational method for checking the integrity of transmitted data, computed
from a sequence of octets taken through a series of arithmetic operations. The
recipient recomputes the value and compares it for verification.
Cisco Router and Security Device Manager. Cisco SDM is an Internet
browser-based software tool designed to configure LAN, WAN, and security
features on a router. See
An encryption-decryption algorithm.
Encrypted, unreadable data, prior to its decryption.
Committed Information Rate. A configured long-term average committed rate to
enforce.
Used by zone-based firewall policies to specify traffic that is to be handled
according to the actions specified in a
of traffic, and can also specify an
traffic.
A clear channel is one through which non-encrypted traffic can flow. Clear
channels place no security restrictions on transmitted data.
Decrypted text. Also called plaintext.
Getting Started
for more information.
policy
map. A class map can specify a type
ACL
to define the source and destinaton of the
OL-4015-12
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Troubleshooting
