Avaya one-X 9600 Series Administrator's Manual page 178

Glossary of Terms
Digital
A digital signature is an encrypted digest of the file (message, document, driver,
Signature
program) being signed. The digest is computed from the contents of the file by a
one-way hash function such as MD5 or SHA-1 and then encrypted with the private
part of a public/private key pair. To prove that the file was not tampered with, the
recipient uses the public key to decrypt the signature back into the original digest,
recomputes a new digest from the transmitted file and compares the two to see if
they match. If they do, the file has not been altered in transit by an attacker.
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 9600 Series IP Deskphones 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 call 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.
IKE Internet Key Exchange Protocol, RFC 2409, which has been obsoleted by IKEv2 in
RFC 4306.
IPsec A security mechanism for IP that provides encryption, integrity assurance, and
authentication of data; applies only to IPv4.
ISAKMP Internet Security Association and Key Management Protocol, RFC 2408, which has
been obsoleted by IKEv2 in RFC 4306, defines the procedures for authenticating a
communicating peer, creation and management of security associations, key
generation techniques, and threat mitigation e.g. Denial of service and Replay
Attacks. ISAKMP defines two phases of negotiation. During Phase 1 negotiation, two
entities establish an ISAKMP SA, which is used to protect Phase 2 negotiations, in
which SAs are established for other protocols.
LAN Local Area Network.
LLDP Link Layer Discovery Protocol. All deskphones 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.
178 9600 Series IP Deskphone Administrator Guide Release 6.0
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