Extreme Networks Summit WM Series Betriebsanweisung PDF herunterladen (Seite 151)

Summit WM-Series WLAN Switch and Altitude Access Point Software Version 1.0 User Guide

151

Fit, thin and fat APs A thin AP architecture uses two components: an access point that is

essentially a stripped-down radio and a centralized management

controller that handles the other WLAN system functions. Wired

network switches are also required.

A fit AP, a variation of the thin AP, handles the RF and encryption,

while the central management controller, aware of the wireless users'

identities and locations, handles secure roaming, quality of service,

and user authentication. The central management controller also

handles AP configuration and management.

A fat (or thick) AP architecture concentrates all the WLAN intelligence

in the access point. The AP handles the radio frequency (RF)

communication, as well as authenticating users, encrypting

communications, secure roaming, WLAN management, and in some

cases, network routing.

FQDN Fully Qualified Domain Name. A “friendly” designation of a

computer, of the general form

computer.[subnetwork.].organization.domain. The FQDN names must

be translated into an IP address in order for the resource to be found

on a network, usually performed by a Domain Name Server.

FTM Forwarding Table Manager

FTP File Transfer Protocol

Gateway In the wireless world, an access point with additional software

capabilities such as providing NAT and DHCP. Gateways may also

provide VPN support, roaming, firewalls, various levels of security,

etc.

Gigabit Ethernet The high data rate of the Ethernet standard, supporting data rates of 1

gigabit (1,000 megabits) per second.

GUI Graphical User Interface

Heartbeat message A heartbeat message is a UDP data packet used to monitor a data

connection, polling to see if the connection is still alive.

In general terms, a heartbeat is a signal emitted at regular intervals by

software to demonstrate that it is still alive. In networking, a heartbeat

is the signal emitted by a Level 2 Ethernet transceiver at the end of

every packet to show that the collision-detection circuit is still

connected.

Host (1) A computer (usually containing data) that is accessed by a user

working on a remote terminal, connected by modems and telephone

lines.

(2) A computer that is connected to a TCP/IP network, including the

Internet. Each host has a unique IP address.

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