which protects against eavesdropping when transmitting HTML
pages (web pages) between server and client. HTTPS is schematic-
ally identical to HTTP. SSL / TLS is used for additional data encryp-
tion. The standard port for HTTPS connections is 443.
Hyperchannel
With a hyperchannel, multiple subscribers have access to the trans-
mission medium. A subscriber can only transmit their data if no oth-
er subscriber is using the medium. A hyperchannel network is
mainly used for short-range operation with top data rates.
IAE
IAE refers to the standard socket (ISDN connection unit) to which
ISDN terminals are connected.
ICMP
The Internet Control Message Protocol (ICMP) is used to exchange
information and error messages over IPv4. The version ICMPv6 ex-
ists for IPv6.
IGMP
The Internet Group Management Protocol (IGMP) is used in IPv4
networks to organise multicast groups.
IKE
The Internet Key Exchange Protocol (IKE) is used for automatic key
management with IPSec connections. The IKE process runs in two
phases. During phase 1, the IKE subscribers authenticate them-
selves to one another and establish a secure channel. In phase 2,
the two IPSec subscribers negotiate the SAs. There are two ver-
sions of the IKE mechanism.
Infrastructure net-
work
In an infrastructure network the individual terminals (clients) form a
wireless LAN via a central access point. This central access point
may also be an agent in other networks.
Internal call tone
The internal call tone on a PBX is used to differentiate between in-
ternal and external calls.
Internal telephone
numbers
Internal phone numbers are used for calls within the PBX.
IP
The Internet Protocol (IP) is a network protocol and it is the basis for
the Internet. It works on the network layer of the OSI model. The
TCP and UDP protocols are based on IP. There are two versions,
Internet Protocol version 4 (IPv4) and Internet Protocol version 6
(IPv6).
IP address
IP addresses are used to navigate in an IP network, to unambigu-
ously identify the source and destination. IPv4 addresses consist of
32 bits, IPv6 addresses of 128 bits. So, with IPv4 232, i.e.
Glossary
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700
elmeg hybird 120 / hybird 130
