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Glossary
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.
SIP
Session Initiation Protocol. SIP is a standard for data transfer in Internet telephony
(VoIP). It describes how a call is carried over the data network and which components,
which transport and signalling protocols are involved.
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.
TAE
Telecommunications connecting unit (German: Telekommunikations-Anschlussein-
heit). Connector for connecting analogue telecommunications devices. F for phone, N
for additional devices such as fax or answer machines.
TCP
Transmission Control Protocol. TCP is part of the
TCP/IP
protocol family. TCP handles data
transport between communication partners (applications). TCP is a session-based trans-
mission protocol, i.e. it sets up, monitors and terminates a connection for transporting
data.
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