Siemens SE551 MER, MRU, MTU, NAT, LAN, Mbps, LANs, WANs, Port, Network, Internet, Firewall, Virtual server, Network adapter, Public IP addresses, Maximum Receive Unit

Glossary

MbpsMillion bits per secondSpecification of the transmission speed in a network.MERMAC Encapsulated RoutingMRUMaximum Receive UnitThe MRU defines the maximum user data volume within a data packet.MTUMaximum Transmission Unit

The MTU defines the maximum length of a data packet that can carried over the network at a time.

NATNetwork Address Translation

NAT is a method for converting IP addresses (mostly Private IP addresses) within a network into one or several 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 of the local network are hidden behind the router's IP address registered on the Internet. Because of this security function NAT is frequently used as part of the Firewall of a network. If you want to make services on a PC in the local network available on the Internet despite NAT, you can configure the Gigaset SE551 WLAN dsl/cable 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

The 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 108 and the Gigaset USB Adapter 108 are examples of wireless network adapters.

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.

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