-157-
Appendix C Glossary
Glossary
Description
ALG
(
Application Layer
Gateway
)
address realm to connect to its counterpart running on a host in
Application Level Gateway (ALG) is application specific
translation agent that allows an application on a host in one
different realm transparently.
ARP
(
Address Resolution
Protocol
)
Internet protocol used to map an IP address to a MAC address.
A
AH
(
Authentication Header
)
A security protocol that provides data authentication and
optional anti-replay services. AH is embedded in the data to be
protected (a full IP datagram).
DDNS
(
Dynamic Domain
Name Server
)
The capability of assigning a fixed host and domain name to a
dynamic Internet IP address.
DHCP
(
Dynamic Host
Configuration Protocol
)
connected to a DHCP server.
A protocol that automatically configure the TCP/IP parameters
for the all the PCs that are
DMZ
(
Demilitarized Zone
)
pose service such as Internet gaming
or videoconferencing.
A Demilitarized Zone allows one local host to be exposed to the
Internet for a special-pur
DNS
(
Domain Nam
Server
)
e
An Internet Server that translates the names of websites into IP
addresses.
D
DSL
(Digital Subscriber
Line)
A technology that allows data to be sent or received over
existing traditional phone lines.
E
ESP
(
Encapsulating
Security Payload
)
at provides data privacy services, optional
Security protocol th
data authentication, and anti-replay services. ESP encapsulates
the data to be protected.
F
FTP
(
File Transfer
Protocol
)
ck, used for
transferring files between network nodes.
Application protocol, part of the TCP/IP protocol sta