D-Link AirPremier DWL-2210AP Manual page 179

Glossary
Router
A router is a network device which forwards packets between networks. It is connected to at
least two networks, commonly between two local area networks (LANs) or between a LAN and
a wide-area network (WAN), for example, the Internet. Routers are located at gateways—places
where two or more networks connect.
A router uses the content of headers and its tables to determine the best path for forwarding
a packet. It uses protocols such as the Internet Control Message Protocol (ICMP), Routing
Information Protocol (RIP), and Internet Router Discovery Protocol (IRDP) to communicate with
other routers to configure the best route between any two hosts. The router performs little filtering
of data it passes.
RSSI
The Received Signal Strength Indication (RSSI) an 802.1x value that calculates voltage relative
to the received signal strength. RSSI is one of several ways of measuring and indicating radio
frequency (RF) signal strength. Signal strength can also be measured in mW (milliwatts), dBms
(decibel milliwatts), and a percentage value.
RTP
Real-Time Transport Protocol (RTP) is an Internet protocol for transmitting real-time data like audio
and video. It does not guarantee delivery but provides support mechanisms for the sending and
receiving applications to enable streaming data. RTP typically runs on top of the UDP protocol,
but can support other transport protocols as well.
RTS
A request to send (RTS) message is a signal sent by a client station to the access point, asking
permission to send a data packet and to prevent other wireless client stations from grabbing
the radio waves. This message is a part of the IEEE 802.11 CSMA/CA protocol. (See also RTS
Threshold and CTS.)
RTS Threshold
The RTS threshold specifies the packet size of a request to send (RTS) transmission. This helps
control traffic flow through the access point, and is especially useful for performance tuning on
an access point with a many clients.
Shared Key
A shared key is used in conventional encryption where one key is used both for encryption and
decryption. It is also called secret-key or symmetric-key encryption.
Also see Public Key.
SNMP
The Simple Network Management Protocol (SNMP) was developed to manage and monitor
nodes on a network. It is part of the TCP/IP protocol suite.
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