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Glossary
Description
H.323
H.323 allows dissimilar communication devices to communicate
with each other by using a standardized communication
protocol. H.323 defines a common set of CODECs, call setup
and negotiating procedures, and basic data transport methods.
H
HTTP
(
Hypertext Transfer
Protocol
)
wsers and Web servers to
text and graphic files.
The protocol used by Web bro
transfer files, such as
ICMP
(
Internet Control
Messages Protocol
)
other information relevant to IP packet processing.
Network layer Internet protocol that reports errors and provides
Internet
Largest global Internetwork, connecting tens of thousands of
networks worldwide and having a “culture” that focuses on
research and standardization based on real-life use.
IP
(
Internet Protocol
)
less Internetwork service. IP provides features for
addressing, type-of-service specification, fragmentation and
Network layer protocol in the TCP/IP stack offering a
connection
reassembly, and security.
ISP
(
Internet Service
Company that provides Internet access to other companies and
Provider
)
individuals.
IKE
(
Internet Key
Exchange
)
IKE establishes a shared security policy and authenticates keys
passed, each router/firewall/host must verify the
identity of its peer.
for services (such as IPSec) that require keys. Before any IPSec
traffic can be
I
IPsec
(
IP Security
)
data
confidentiality, data integrity, and data authentication between
A framework of open standards that provides
participating peers.
L LAN
(
Local Area Network
)
geographic area (up to a few thousand meters). LANs connect
workstations, peripherals, terminals, and other devices in a
single building or other geographically limited area.
High-speed, low-error data network covering a relatively small