Glossary

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 (for example 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 the Gigaset SX541 WLAN dsl directs data packets from the Internet that are addressed to a particular Port 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 serverPPPoAPoint-to-Point Protocol over ATM

PPPoA is a Protocol for connecting network components in a local Ethernet network to the Internet via an ATM network.

PPPoEPoint-to-Point Protocol over Ethernet

PPPoE is a Protocol for connecting network components in a local Ethernet network to the Internet via a modem.

Private IP address

The private IP address (also known as the local 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, such as the Gigaset SX541 WLAN dsl, have a private and a Public IP address.

Protocol

A protocol describes the agreements for communicating in a network. It contains rules for opening, administering and closing a connection, as well as about data formats, time frames and handling possible errors. Communications between two applications require different protocols at various levels, for example the TCP/IP protocols for the Internet.

Public IP address

The public IP address (also known as the global IP address) is a network component's address on the Internet. It is assigned by the Internet Provider. Devices that create a link from a LAN to the Internet, such as the Gigaset SX541 WLAN dsl, have a public and a Private IP address.

Radio networkSee WLAN

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