Avaya one-X 1603SW, Руководство администратора, Страница: 115 / 124

Issue 1 June 2010 115
Appendix A: Glossary of Terms
802.1P
802.1Q 802.1Q defines a layer 2 frame structure that supports VLAN identification and a QoS
mechanism usually referred to as 802.1P.
802.1X Authentication method for a protocol requiring a network device to authenticate with a
back-end Authentication Server before gaining network access. Applicable 1600
Series IP telephones support IEEE 802.1X for pass-through and for Supplicant
operation with the EAP-MD5 authentication method.
ARP Address Resolution Protocol, used, for example, to verify that the IP address provided
by the DHCP server is not in use by another IP telephone.
CELP Code-excited linear-predictive. Voice compression requiring only 16 kbps of
bandwidth.
CLAN Control LAN, type of Gatekeeper circuit pack.
CNA Converged Network Analyzer, an Avaya product to test and analyze network
performance.
DHCP Dynamic Host Configuration Protocol, an IETF protocol used to automate IP address
allocation and management.
DiffServ Differentiated Services, an IP-based QoS mechanism.
DNS
Domain Name System, an IETF standard for ASCII strings to represent IP
addresses. The Domain Name System (DNS) is a distributed Internet directory
service. DNS is used mostly to translate between domain names and IP addresses.
Avaya 1600 Series IP Telephones can use DNS to resolve names into IP addresses.
In DHCP, TFTP, and HTTP files, DNS names can be used wherever IP addresses
were available as long as a valid DNS server is identified first.
Gatekeeper H.323 application that performs essential control, administrative, and managerial
functions in the media server. Sometimes called CLAN in Avaya documents.
H.323 A TCP/IP-based protocol for VoIP signaling.
HTTP Hypertext Transfer Protocol, used to request and transmit pages on the World Wide
Web.
HTTPS A secure version of HTTP.
IETF Internet Engineering Task Force, the organization that produces standards for
communications on the internet.
LAN Local Area Network.
LLDP Link Layer Discovery Protocol. All IP telephones with an Ethernet interface support
the transmission and reception of LLDP frames on the Ethernet line interface in
accordance with IEEE standard 802.1AB.
MAC Media Access Control, ID of an endpoint.
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