Siemens SE505 - Manual (Page 125)

129
Glossary
Gigaset SE505 dsl/cable / English / A31008-E505-B100-1-7619 / glossary.fm / 16.07.2003
Mbps
Million bits per second
The transmission speed in a network.
MRU
Maximum Receive Unit
The MRU defines the maximum user data volume within a data packet.
MTU
Maximum Transmission Unit
The MTU defines the maximum length of a data packet that can carried over the
network at a time.
NAT
Network Address Translation
NAT is a method for implementing IP addresses (mostly
Private IP addresses ) in a
network on 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 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 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 SE505 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 files and peripherals. A general distinction is made between
local area networks ( LAN ) and wide-area networks ( WAN ).
Network adapter
The network adapter is the hardware device that connects a network component to a
local area network. The connection can be wired or wireless. An Ethernet network card
is an example of a wired network adapter. The Gigaset PC Card 54 and the Gigaset PCI
Card 54 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.
Port Forwarding
In Port Forwarding the Gigaset SE505 dsl/cable 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 server