elmeg IP120 / en / elmegIP120_v1 / glossary.fm / 01.08.2012
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Glossary
Internet
Global
WAN
. A series of protocols known as TCP/IP have been defined for exchanging data.
All
network subscribers
are identifiable by an
IP address
.
DNS
assigns a
domain name
to
the
IP address
.
Important services on the Internet include the World Wide Web (WWW), e-mail, file transfer
and discussion forums.
Internet service provider
Enables access to the Internet for a fee.
Internet telephony
Voice over IP.
IP (Internet Protocol)
TCP/IP protocol on the
Internet
. IP is responsible for the addressing of subscribers in a
net-
work
using
IP addresses
, and routes data from a sender to the recipient. IP determines the
paths (routing) along which the data packets travel.
There are standard IPv4 and IPv6 protocols; the essential difference is the structure of the IP
addresses.
IP address
A unique address for a network component within a network based on the TCP/IP protocols
(e.g., LAN, Internet). On the
Internet
, domain names are usually assigned instead of IP
addresses.
DNS
assigns the corresponding IP address to the domain name.
The IPv4 IP address has four parts (decimal numbers between 0 and 255) separated by full
stops (e.g., 230.94.233.2).
The IP address is made up of the network number and the number of the
network sub-
scriber
(e.g., phone). Depending on the subnet mask, the first, second or third part makes up
the network number and the rest of the IP address addresses the network component. The
network number of all the components in any one network must be identical.
IP addresses can be assigned automatically with DHCP (dynamic IP addresses) or manually
(static IP addresses).
See also:
DHCP
.
IP pool range
Range of IP addresses that the DHCP server can use to assign dynamic IP addresses.
L
LAN
Local Area Network
Network with a restricted physical range. A LAN can be wireless (WLAN) and/or wired (Ether-
net).
LDAP
Lightweight Directory Access Protocol
Service for managing directories across a network.
LDAP is used to store and access information about individuals who are part of an organisa-
tion (e.g., employees).
