Page 56 - Glossary
Glossary
AH
Authentication Header. Within the IPSec architecture, the packet format for algorithms and
general issues associated with authentication. See SA.
ARP
Address Resolution Protocol. A low level protocol within the TCP/IP suite that
maps
IP
addresses to the corresponding Ethernet addresses.
ASN.1
Abstract Syntax Notation (1). A method for describing data that is used in many other standards.
CHAP
Challenge-Handshake Authentication Protocol. An authentication method that can be used
when connecting to an ISP.
CO
Central Office. A common carrier switching centre in which trunks and/or loops are terminated
and switched.
CPE
Customer Premise Equipment. Systems that are at a customer's site (as compared systems that
are in a service provider's network, see CO).
DES
Data Encryption Standard. A cryptographic encryption algorithm that is part of many standards.
Diffie-Hellman
A cryptographic key-exchange algorithm that is part of many standards. See also X9.42.
Digital Signature
A method for proving that the holder of a private key is the originator of a message
DSS
Digital Signature Standard. A cryptographic signature algorithm that is part of many standards.
Also called DSA (Digital Signature Algorithm).
DSL
Digital Subscriber Line. A generic name for a family of digital lines (also called xDSL) provided
by the competitive Local Exchange Carrier and local telephone companies to their local
subscribers.
ESP
Encapsulating Security Payload. Within the IPSec architecture, the packet format for algorithms
and general issues associated with encryption. See SA.
HardPhone
The term HardPhone refers to a IP extension, a dedicated LAN attached H323 compliant device
IKE
Internet Key Exchange. The protocol used to exchange symmetric keys for performing IPSec.
ISDN
Integrated Services Digital Network. A set of international standards for a switched network that
supports access to any type of service.
IPSec
IP Security. The protocol used to provide authentication and/or encryption to IP traffic.
IPSOE
IP Office - Small Office Edition. The smallest member of the IP Office family of phone systems.
ISP
Internet Service Provider.
ISAKMP
Internet Security Association and Key Management Protocol. The basis for IKE.
LAC
L2TP Access Concentrator.
L2TP
Layer 2 Tunneling Protocol. Provides a means for tunneling IP traffic in layer 2. Can be used
with IPSec to provide authentication.
LDAP
Lightweight Directory Access Protocol. A simpler protocol for directory access than X.500.
LDP
Label
Distribution
Protocol.
LNS
L2TP Network Server.
LSR
Label Switching Router. A router that can read and respond to labeled layer 2 datagrams
MPLS
MultiProtocol Label Switching protocol.
NAS
Network Access Server is a device providing temporary, on-demand network access to users.
This access is usually point-to-point using PSTN or ISDN lines.
Oakley
A protocol in which two authenticated parties can agree on secret keys.
