Glossary
GL-10
Cisco Router and Security Device Manager Version 2.2 User’s Guide
OL-4015-08
ESP Encapsulating Security Payload. An IPSec protocol that provides both data
integrity and confidentiality. Also known as Encapsulating Security Payload,
ESP provides confidentiality, data origin authentication, replay-detection,
connectionless integrity, partial sequence integrity, and limited traffic flow
confidentiality.
ESP_SEAL ESP with the 160-bit key SEAL (Software Encryption Algorithm) encryption
algorithm. This feature was introduced in 12.3(7)T. The router must not have
hardware IPSec encryption enabled in order to use this feature.
esp-3des ESP (Encapsulating Security Payload) transform with the 168-bit DES
encryption algorithm (3DES or Triple DES).
esp-des ESP (Encapsulating Security Payload) transform with the 56-bit DES encryption
algorithm.
ESP-MD5-HMAC ESP (Encapsulating Security Payload) transform using the MD5-variant SHA
authentication algorithm.
esp-null ESP (Encapsulating Security Payload) transform that provides no encryption
and no confidentiality.
ESP-SHA-HMAC ESP (Encapsulating Security Payload) transform using the HMAC-variant SHA
authentication algorithm.
Ethernet A widely used LAN protocol invented by Xerox Corporation, and developed by
Xerox, Intel, and Digital Equipment Corporation. Ethernet networ ks use
CSMA/CD, and run over a variety of cable types at 10 Mbps, or at 100 Mbps.
Ethernet is similar to the IEEE 802.3 series of standards.
expiration date The expiration date within a certificate or key indicates the end of its limited
lifetime. The certificate or key is not trusted after its expiration date passes.
exception list In a NAC implementation, a list of hosts with static addresses that are allowed
to bypass the NAC process. These hosts may be placed on the exception list
because they do not have posture agents installed, or because they are hosts such
as printers or Cisco IP phones.