ppcboot

Cisco Wireless LAN Controller Bootloader.

PPP

Point-to-Point Protocol.

Proxy Server

Used in larger companies and organizations to improve network operations and security, a proxy server is able to prevent direct communication between two or more networks. The proxy server forwards allowable data requests to remote servers and/or responds to data requests directly from stored remote server data.

QoS

Quality of Service. A term that guarantees a specific throughput level. For instance, high QoS can be used to ensure adequate throughput for Voice over WLAN.

Range

How far will your wireless network stretch? Most Wi-Fi systems will provide a range of a hundred feet or more. Depending on the environment and the type of antenna used, Wi-Fi signals can have a range of up to mile.

RADIUS

Remote Authentication Dial-In User Service. An authentication and accounting system used to exclude unauthorized clients.

Residential Gateway

A wireless device that connects multiple PCs, peripherals and the Internet on a home network. Most Wi-Fi residential gateways provide DHCP and NAT as well.

RF

Radio Frequency. A frequency within which radio waves may be transmitted.

RJ-45

Standard connectors used in Ethernet networks. Even though they look very similar to standard RJ-11 telephone connectors, RJ-45 connectors can have up to eight wires, whereas telephone connectors have only four.

Roaming

Moving seamlessly from one AP coverage area to another with no loss in connectivity.

Router

A device that forwards data packets from one local area network (LAN) or wide area network (WAN) to another. Based on routing tables and routing protocols, routers can read the network address in each transmitted frame and make a decision on how to send it via the most efficient route based on traffic load, line costs, speed, bad connections, etc.

RSN

Robust Security Network. An IEEE 802.11i working group strong authentication and encryption standard that uses 802.1X, EAP, AES, TKIP, and MIC.

5/26/05 OL-7426-03

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Cisco Systems OL-7426-03 quick start Ppp, Radius, Rsn