Siemens SE105 Specifikace stáhnout pdf (Strana 119)

118

Glossary

Gigaset WLAN Repeater/ englisch / A31008-E505-B105-1-7619 / glossary.fm / 08.03.2004

Network adapter

The network adapter is the hardware device that implements the connection of a net-

work component to a local network. The connection can be wired or wireless. An Eth-

ernet network card is an example of a wired network adapter. Wireless network adapt-

ers are for example the Gigaset PC Card 54 and the Gigaset PCI Card 54.

A network adapter has a unique address, the MAC address.

Port

Data is exchanged between two applications in a network across a port. The port

number addresses an application within a network component. The combination of IP

address/port number uniquely identifies the recipient or sender of a data packet within

a network. Some applications (e.g. Internet services such as HTTP or FTP) work with

fixed port numbers, others are allocated a free port number whenever they need one.

Port Forwarding

In Port Forwarding, data packets from the Internet that are addressed to a particular

Port are directed to the corresponding port of the appropriate network component. This

enables servers within the local area network to offer services on the Internet without

them needing a Public IP address.

See also: Virtual server

PPPoE

Point-to-Point Protocol over Ethernet

PPPoE is a Protocol for connecting network components in a local Ethernet network to

the Internet via a modem.

PPTP

Point-to-Point Tunnelling Protocol

An Internet connection using PPTP Protocol that creates a "tunnel" within an Internet

connection for secure private connection in which the data are sent in encrypted form.

The PPTP protocol is used in a Virtual Private Network (VPN).

Private IP address

The private IP address is a network component's address within the local area network

(LAN). The network operator can assign any address he or she wants. Devices that act

as a link from a local network to the Internet have a private and a Public IP address.

Protocol

A protocol describes the agreements for communicating on a network. It contains rules

for opening, administering and closing a connection, about data formats, time frames

and error handling. Communications between two applications require different proto-

cols at various levels, e.g. the TCP/IP protocols for the Internet.

Public IP address

The public IP address is a network component's address on the Internet. It is assigned

by the Internet Provider. Devices that act as a link from a local network to the Internet

have a public and a Private IP address.

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