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Glossary
IP net:
An Ethernet-based interface that can become a LAN or a WAN inter-
face.
LAN:
Local Area Network; a network of computers which are located rela-
tively close to each other.
LAN interface:
machine network, local network); it is connected to a WAN via the
router.
MAC address:
interface. Each Ethernet interface has a unique global number, the
MAC address.
Netmask:
Defines a logical group of IP addresses in net address and device ad-
dresses.
Net address: Consists of the overlap of IP address and netmask. It always ends with
"0". The netmask (e.g. 255.255.255.0) is applied in binary form to an IP
address (e.g. 192.168.1.1); the still "visible" part of this overlapping
(masking) is the net address (here: 192.168.1.0).
Network rules:
work device. You can block or redirect data packets to or from certain
network participants for example.
Port:
(1) Socket at the switch for connecting Ethernet devices.
(2) Part of a socket for data connections
Port-Forwarding: Network rules that redirect data packets from certain senders to
special recipients of a network.
PPP:
Point to Point Protocol; a protocol, which connects two machines via a
serial line to enable the exchange of TCP/IP packets between those
two machines.
PPPoE:
Point to Point Protocol over Ethernet; a protocol, which connects two
devices via an Ethernet line to enable the exchange of TCP/IP packets
between those two machines.
Router:
This is a machine in a network, which is responsible for the incoming
data of a protocol to be forwarded to the planned destination or sub
network.
SCN:
Service Center Number, phone number of the computer that accepts
short messages (->SMS) via the GSM network and forwards them to
the recipients.
Server:
Device that provides services, e.g. web server, to other devices (cli-
ent).
SMS:
Short Message Service; short messages can be sent via the GSM cel-
lular network.
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An interface that is assigned to a local network (plant network,
Media Access Control Address. A MAC is a part of an Ethernet
You decide how the different data packets are handled in a net-
MIRO
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