Cisco TelePresence Administrator's Manual page 473

Term
FQDN
Fully Qualified Domain
Name
Gatekeeper
Gatekeeper zone
GRUU
Globally Routable User
Agent URI
H.323
HTTP
Hypertext Transfer
Protocol
HTTPS
Hypertext Transfer
Protocol over Secure
Socket Layer
Hop count
ICE
Interactive Connectivity
Establishment
IETF
Internet Engineering
Task Force
Interworking
IPsec
Internet Protocol Security
IPv4
Internet Protocol version
4
IPv6
Internet Protocol version
6
IRQ
Information Request
LAN
Local Area Network
Cisco VCS Administrator Guide (X7.1)
Definition
A domain name that specifies the node's position in the DNS tree absolutely, uniquely
identifying the system or device. Note that in order to use FQDNs instead of IP
addresses when configuring the VCS, you must have at least one DNS server
configured.
A device used to control H.323 multimedia networks. An example is the TANDBERG
Gatekeeper.
A collection of all the endpoints, gateways and MCUs managed by a single
gatekeeper.
A SIP URI that can be used anywhere on the internet to route a request to a specific
AOR instance. Defined by
A standard that defines the protocols used for packet-based multimedia
communications systems.
A protocol used for communications over the internet.
A protocol used for secure communications over the internet, combining HTTP with
TLS.
The maximum number of gatekeeper or SIP proxy devices (e.g. a VCS) that a
message may be forwarded through before it is decided that its intended recipient is
not reachable.
A collaborative algorithm that works together with STUN services (and other NAT
traversal techniques) to allow clients to achieve firewall traversal. This is the emerging
traversal standard for use by SIP endpoints (although it could be used for other
protocols).
An organization that defines (via documents such as RFCs) the protocol standards
and best practices relating to the design, use and management of the internet.
Allowing H.323 systems to connect to SIP systems.
A protocol suite for securing IP communications. It is used by the VCS to establish
secure communication between cluster peers.
Version 4 of the Internet Protocol, defined in
Version 6 of the Internet Protocol, defined in
A request sent to an endpoint requesting information about its status.
A geographically limited computer network, usually with a high bandwidth throughput.
RFC 5627.
RFC 791.
RFC 2460.
Reference material
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