GLOSSARY GLOSSARY
Ed. 044/8 Réf. 3EH 21000 BSAA
audio, video, etc) over the Internet.
HTTPS
"Secure HyperText Transfer Protocol". Secure version of HTTP: encrypts and decrypts pages contai-
ning user requests as well as pages retrieved from a web server.
H.323
ITU standard for multimedia communication (voice, video, data).
I
IAP
"Internet Access Provider". See ISP.
ICMP
"Internet Control Message Protocol". Network protocol that provides error reports and information
on the processing of IP packets.
IMAP4
"Internet Message Access Protocol". A protocol of the same type as POP3, the difference being that
the messages always stay on the ISP server, even after consultation. IMAP requires continuous ac-
cess to the server while the messaging service is in use.
IN
Installation Number.
IPSec
"Internet Protocol Security". Standard taking network security into account. Protocol used in the im-
plementation of VPNs, and for remote access by connection to a VPN.
ISDN
"Integrated Services Digital Network". Standard for the transmission of digital data over telephone
cables or other communication vectors.
ISP
"Internet Service Provider". A company that provides Internet access for individuals and enterprises,
along with other services, such as web site construction and hosting.
ISVPN
"Integrated Services Virtual Private Network". Protocol used in a private virtual digital network; it of-
fers functions such as transfer optimization and the transmission of information such as the name,
busy status or diversions.
ISVPN+
Includes metering information in addition to the usual ISVPN services.
ITU
International Telecommunications Union: global coordination body.
K
KEY SYSTEM (mode)
Reflexes terminal operating mode in which the terminal features as many resource keys (RSP) as
there are network lines in the system.
L
LAN
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