Gigaset SE681 WiMAX User Manual page 68

Glossary
Provider
A provider (Internet Service Provider) offers access to the Internet for a fee.
RJ
Registered Jack. Standardised connection, also known as a modular jack.
Router
A router directs data packets from one local area network (LAN) to another via the fast-
est route. A router enables the connection between networks of different network tech-
nologies and this is performed on the basis of a common protocol. For example, it can
link a local network with WiMAX technology to the Internet.
RSSI
Received Signal Strength Indication. Characteristic value for the signal strength of radio
connections, used by communication devices for the automatic selection of a suitable
channel.
Server
A server makes services available to other network components (clients). The term
"server" is often used to refer to a PC. However it can also mean an application that pro-
vides a particular service such as DNS, DHCP or a Web service.
SMTP
Simple Mail Transfer Protocol. The SMTP protocol is a TCP/IP protocol and regulates the
exchange of electronic post on the Internet. Your Provider provides you with access to
an SMTP server.
Subnet
A subnet divides a network into smaller units.
Subnet mask
The subnet mask determines how many parts of the IP addresses of a network represent
the network number and how many parts represent the network component number.
If the subnet mask in a network is 255.255.255.0, for example, this means that the first
three parts of the IP address make up the network number and only the last part can be
used to assign network component numbers. The first three parts of the IP address of
all network components are in this case always the same.
Switch
A switch is a central distributor in a wired network, which, unlike a hub, provides intel-
ligent distribution of data transfer. The switch only ever forwards a data packet to the
subnet or network component the data packet is intended for. Unnecessary transfer of
data in the network thus avoided.
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