Sony SE366 113

Glossary

NAT

Network Address Translation

NAT is a method for converting IP addresses (Private IP addresses) within a network into one or more Public IP addresses on the Internet. With NAT several network components in a LAN can share the router's public IP address to connect to the Internet. The network components on the local network are hidden behind the router's IP address, which is registered on the Internet. Because of this security function, NAT is frequently used as part of a network Firewall. If you want to make services on a PC in the local network available on the Internet despite NAT, you can configure the Gigaset SE366 WLAN as a Virtual server.

Network

A network is a group of devices connected in wired or wireless mode so that they can share resources such as data and peripherals. A general distinction is made between local area networks (LANs) and wide area networks (WANs).

Network adapter

A network adapter is the hardware device that creates the connection between a network component and a local network. The connection can be wired or wireless. An Eth- ernet network card is an example of a wired network adapter. The Gigaset PC Card 300 and the Gigaset USB Adapter 300 are examples of wireless network adapters.

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

Public IP address

The public IP address (also known as 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 SE366 WLAN, have a public and a Private IP 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 the Gigaset SE366 WLAN 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.