Siemens gigaset se551 ユーザーズマニュアル

Gigaset SE551 WLAN dsl/cable / deutsch / A31008-M1029-B101-1-19 / glossary.fm / 25.10.2006

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Firewall
Firewalls are used by network operators as protection against unauthorised external 
access. This involves a whole bundle of hardware and software actions and technologies 
that monitor and control the data flow between the private network to be protected and 
an unprotected network such as the 

. 

See also 

Flat rate
Flat rate is a particular billing system for 

 connections The 

charges a monthly fee regardless of the duration and number of logins.

Full duplex
Data transmission mode in which data can be sent and received at the same time. 
See also 

 

Gateway
A gateway is a device for connecting networks with completely different architectures 
(addressing, protocols, application interfaces etc.). Although it is not totally correct, the 
term is also used as a synonym for 

Global IP address
See 

Half duplex
Operating mode for data transfer. Only one party can receive or send data at a time.
See also 

HTTP Proxy
An HTTP proxy is a 

 that network components use for their 

 traffic. All 

requests are sent via the proxy. 

Hub
A Hub connects several network components in a star-topology network by sending all 
the data it receives from one network component to all the other network components. 
See also: 

IEEE
Institute of Electrical and Electronic Engineers
The IEEE is an international body for defining network standards, especially for stand-
ardising 

 technologies, transmission protocols and speeds, and wiring. 

 802.11 is a standard for wireless LANs operating in the 2.4 GHz band. In so-called 

, terminals can be connected to a base station (

) or they 

can connect with each other spontaneously (