Acer WLAN-G-RU2 Benutzerhandbuch Seite 68

6. Glossary
IEEE 802.11 Standard
The IEEE 802.11 Wireless LAN standards subcommittee, which is formulating
a standard for the industry.
Access point
An Internet working device that seamlessly connects wired and wireless networks together.
Ad hoc
An ad hoc wireless LAN is a group of computers, each with a WLAN adapter, connected as an
independent wireless LAN. Ad hoc wireless LAN is applicable at a departmental scale for a branch or
SOHO operation.
BSSID
A specific ad hoc LAN is called a Basic Service Set (BSS). Computers in a BSS must be configured with
the same BSSID.
DHCP
Dynamic Host Configuration Protocol - a method in which IP addresses are assigned by a server
dynamically to clients on the network. DHCP is used for dynamic IP addressing and requires a dedicated
DHCP server on the network.
DSSS
Direct Sequence Spread Spectrum. This is the method the wireless adapters use to transmit data over the
frequency spectrum. An alternative method is frequency hopping. Direct sequence spreads the data over
one frequency range (channel) while frequency hopping jumps from one narrow frequency band to
another many times per second.
ESSID
An infrastructure configuration could also support roaming capability for mobile workers. More than one
BSS can be configured as an extended service set (ESS). Users within an ESS can roam freely between
BSSs while served as a continuous connection to the network wireless stations and access points within
an ESS must be configured with the same ESSID and the same radio channel.
Ethernet
Ethernet is a 10/100Mbps network that runs over dedicated home/office wiring.
Users must be wired to the network at all times to gain access.
Gateway
A gateway is a hardware and software device that connects two dissimilar systems, such as a LAN and a
mainframe. In Internet terminology, a gateway is another name for a router. Generally a gateway is used
as a funnel for all traffic to the Internet.
IEEE
Institute of Electrical and Electronics Engineers
Infrastructure
An integrated wireless and wired LAN is called an infrastructure configuration. Infrastructure is
applicable on an enterprise scale for wireless access to a central database, or wireless application for
mobile workers.
ISM Band
The FCC and their counterparts outside of the U.S. have set aside bandwidth for unlicensed use in the
so-called ISM (Industrial, Scientific and Medical) band. Spectrum in the vicinity of 2.4 GHz, in particular,
is being made available worldwide. This presents a truly revolutionary opportunity to place convenient
high speed wireless capabilities in the hands of users around the globe.
LAN
Local Area Network. A LAN is a group of computers, each equipped with the appropriate network
adapter connected by cable/air that share applications, data, and peripherals. All connections are made via
cable or wireless media, but a LAN does not use telephone services. It typically spans a single building or
campus.
Network
A network is a system of computers that is connected. Data, .les, and messages can be transmitted over
this network. Networks may be local or wide area networks.
Protocol
A protocol is a standardized set of rules that specify how a communication is to take place, including the
format, timing, sequencing and/ or error checking.