5/26/05
OL-7426-03
ppcbootppcboot
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.
QoSQoS
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.