Extreme Networks Summit WM Series Uživatelská příručka stáhnout pdf (Strana 162)

Glossary

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

162

TLS Transport Layer Security. (See EAP, Extensible Authentication

Protocol)

ToS / DSCP ToS (Type of Service) / DSCP (Diffserv Codepoint). The ToS/DSCP

field contained in the IP header of a frame is used by applications to

indicate the priority and Quality of Service (QoS) for each frame. The

level of service is determined by a set of service parameters which

provide a three way trade-off between low-delay, high-reliability, and

high-throughput. The use of service parameters may increase the cost

of service.

TSN Transition Security Network. A subset of Robust Security Network

(RSN), which provides an enhanced security solution for legacy

hardware. The Wi-Fi Alliance has adopted a solution called Wireless

Protected Access (WPA), based on TSN. RSN and TSN both specify

IEEE 802.1x authentication with Extensible Authentication Protocol

(EAP).

Tunnelling Tunnelling (or encapsulation) is a technology that enables one

network to send its data via another network's connections.

Tunnelling works by encapsulating packets of a network protocol

within packets carried by the second network. The receiving device

then decapsulates the packets and forwards them in their original

format.

UDP User Datagram Protocol. A connectionless protocol that, like TCP,

runs on top of IP networks. Unlike TCP/IP, UDP/IP provides very

few error recovery services, offering instead a direct way to send and

receive packets over an IP network. It is used primarily for

broadcasting messages over a network.

U-NII Unlicensed National Information Infrastructure. Designated to provide

short-range, high-speed wireless networking communication at low

cost, U-NII consists of three frequency bands of 100 MHz each in the 5

GHz band: 5.15-5.25GHz (for indoor use only), 5.25-5.35 GHz and

5.725-5.825GHz. The three frequency bands were set aside by the FCC

in 1997 initially to help schools connect to the Internet without the

need for hard wiring. U-NII devices do not require licensing.

URL Uniform Resource Locator. the unique global address of resources or

files on the World Wide Web. The URL contains the name of the

protocol to be used to access the file resource, the IP address or the

domain name of the computer where the resource is located, and a

pathname -- a hierarchical description that specifies the location of a

file in that computer.

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