Extreme Networks Summit WM Series Guía de usuario Pagina 157

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Summit WM-Series WLAN Switch and Altitude Access Point Software Version 1.0 User Guide
157
PAP Password Authentication Protocol is the most basic form of
authentication, in which a user's name and password are transmitted
over a network and compared to a table of name-password pairs.
Typically, the passwords stored in the table are encrypted. (See
CHAP).
PDU Protocol Data Unit. A data object exchanged by protocol machines
(such as management stations, SMUX peers, and SNMP agents) and
consisting of both protocol control information and user data. PDU is
sometimes used as a synonym for “packet''.
PEAP PEAP (Protected Extensible Authentication Protocol) is an IETF draft
standard to authenticate wireless LAN clients without requiring them
to have certificates. In PEAP authentication, first the user authenticates
the authentication server, then the authentication server authenticates
the user. If the first phase is successful, the user is then authenticated
over the SSL tunnel created in phase one using EAP-Generic Token
Card (EAP-GTC) or Microsoft Challenged Handshake Protocol
Version 2 (MSCHAP V2). (See also EAP-TLS).
PHP server Hypertext Preprocessor
PKI Public Key Infrastructure
PoE Power over Ethernet. The Power over Ethernet standard (802.3af)
defines how power can be provided to network devices over existing
Ethernet connection, eliminating the need for additional external
power supplies.
POST Power On Self Test, a diagnostic testing sequence performed by a
computer to determine if its hardware elements are present and
powered on. If so, the computer begins its boot sequence.
push-to-talk (PTT) The push-to-talk (PTT) is feature on wireless telephones that allows
them to operate like a walkie-talkie in a group, instead of standard
telephone operation. The PTT feature requires that the network be
configured to allow multicast traffic.
A PTT call is initiated by selecting a channel and pressing the “talk”
key on the wireless telephone. All wireless telephones on the same
network that are monitoring the channel will hear the transmission.
On a PTT call you hold the button to talk and release it to listen.
Q
QoS Quality of Service. A term for a number of techniques that intelligently
match the needs of specific applications to the network resources
available, using such technologies as Frame Relay, Asynchronous
Transfer Mode (ATM), Ethernet and 802.1 networks, SONET, and
IP-routed networks. QoS features provide better network service by
supporting dedicated bandwidth, improving loss characteristics,
avoiding and managing network congestion, shaping network traffic,
setting traffic priorities across the network.
Quality-of-Service (QoS): A set of service requirements to be met by
the network while transporting a flow. (RFC2386)
P (Continued)
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