Appendix767AppendixAppendix A: Glossary802.1x--an IEEE Standard for port-based Network Access Control (PNAC). It is a part of the IEEE802.1 group of networking protocols. It provides an authentication mechanism to deviceswishing to attach to a LAN or WLAN.ACS (Auto Configuration server)--responsible for auto-configuration of the Central ProcessingElement (CPE).Cryptographic Key--a piece of variable data that is fed as input into a cryptographic algorithmto perform operations such as encryption and decryption, or signing and verification.DHCP (Dynamic Host Configuration Protocol)--built on a client-server model, where designatedDHCP server hosts allocate network addresses and deliver configuration parameters todynamically configured hosts.DHCP Option--can be configured for specific values and enabled for assignment anddistribution to DHCP clients based on server, scope, class or client-specific levels.DNS (Domain Name System)--a hierarchical distributed naming system for computers, services,or any resource connected to the Internet or a private network.EAP-MD5 (Extensible Authentication Protocol-Message Digest Algorithm 5)--only providesauthentication of the EAP peer to the EAP server but not mutual authentication.EAP-TLS (Extensible Authentication Protocol-Transport Layer Security) –provides for mutualauthentication, integrity-protected cipher suite negotiation between two endpoints.PEAP-MSCHAPv2 (Protected Extensible Authentication Protocol-Microsoft ChallengeHandshake Authentication Protocol version 2) –provides for mutual authentication, but does notrequire a client certificate on the IP phone.FAC (Feature Access Code)--special patterns of characters that are dialed from a phone keypadto invoke particular features.HTTP (Hypertext Transfer Protocol)--used to request and transmit data on the World WideWeb.HTTPS (Hypertext Transfer Protocol over Secure Socket Layer)--a widely-used communicationsprotocol for secure communication over a network.IEEE (Institute of Electrical and Electronics Engineers)--a non-profit professional associationheadquartered in New York City that is dedicated to advancing technological innovation andexcellence.LAN (Local Area Network)--used to interconnects network devices in a limited area such as a
