Cisco ASA 5505 Configuration Manual page 1780

Glossary
Allows dissimilar communication devices to communicate with each other by using a standardized
H.323
communication protocol. H.323 defines a common set of CODECs, call setup and negotiating
procedures, and basic data transport methods.
Registration, admission, and status signaling protocol. Enables devices to perform registration,
H.323 RAS
admissions, bandwidth changes, and status and disengage procedures between
gatekeeper.
Call transfer supplementary service for H.323.
H.450.2
Call diversion supplementary service for H.323.
H.450.3
A hash algorithm is a one-way function that operates on a message of arbitrary length to create a
Hash, Hash
Algorithm fixed-length message digest used by cryptographic services to ensure its data integrity. MD5 has a
smaller digest and is considered to be slightly faster than SHA-1. Cisco uses both
hashes within our implementation of the
A firewall, concentrator, or other host that serves as the entry point into a private network for
headend
client connections over the public network. See also
A mechanism for message authentication using cryptographic hashes such as
HMAC
The name for any device on a TCP/IP network that has an IP address. See also
host
An IP address and netmask used with other information to identify a single host or network subnet for
host/network
adaptive security appliance configuration, such as an address translation (xlate) or ACE.
Hypertext Transfer Protocol. A protocol used by browsers and web servers to transfer files. When a
HTTP
user views a web page, the browser can use HTTP to request and receive the files used by the web
page. HTTP transmissions are not encrypted.
Hypertext Transfer Protocol Secure. An SSL-encrypted version of HTTP.
HTTPS
I
Internet Assigned Number Authority. Assigns all port and protocol numbers for use on the Internet.
IANA
Internet Control Message Protocol. Network-layer Internet protocol that reports errors and provides
ICMP
other information relevant to IP packet processing.
Intrusion Detection System. A method of detecting malicious network activity by signatures and then
IDS
implementing a policy for that signature.
The Internet Engineering Task Force. A technical standards organization that develops
IETF
documents defining protocols for the Internet.
Internet Group Management Protocol. IGMP is a protocol used by IPv4 systems to report IP
IGMP
memberships to neighboring multicast routers.
Cisco ASA 5500 Series Configuration Guide using ASDM
GL-8
IPsec framework. See also encryption, HMAC, and VPN.
ISP and VPN.
VoIP gateway and the
SHA-1 and MD5
VPN
SHA-1 and MD5.
network and node.
RFC
multicast
OL-20339-01