qpcom QP-W4400NUSB, Руководство пользователя

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A method of assigning IP addresses to clients on the network. In networks with Static IP address,
the network administrator manually assigns an IP address to each computer. Once a Static IP
address is assigned, a computer uses the same IP address every time it reboots and logs on to the
network, unless it is manually changed.
17. Temporal Key Integrity Protocol (TKIP)
The Temporal Key Integrity Protocol, pronounced tee-kip, is part of the IEEE 802.11i encryption
standard for wireless LANs. TKIP is the next generation of WEP, the Wired Equivalency Protocol,
which is used to secure 802.11 wireless LANs. TKIP provides per-packet key mixing, a message
integrity check and a re-keying mechanism, thus fixing the flaws of WEP.
18. Transmission Control Protocol / Internet Protocol (TCP/IP)
TCP/IP is the protocol suite developed by the Advanced Research Projects Agency (ARPA). It is
widely used in corporate Internet works, because of its superior design for WANs. TCP governs how
packet is sequenced for transmission the network. The term “TCP/IP” is often used generically to
refer to the entire suite of related protocols.
19. Transmit / Receive
The wireless throughput in Bytes per second averaged over two seconds.
20. Wi-Fi Alliance
The Wi-Fi Alliance is a nonprofit international association formed in 1999 to certify interoperability of
wireless Local Area Network products based on IEEE 802.11 specification. The goal of the Wi-Fi
Alliance’s members is to enhance the user experience through product interoperability. The
organization is formerly known as WECA.
21. Wi-Fi Protected Access (WPA)
The Wi-Fi Alliance put together WPA as a data encryption method for 802.11 wireless LANs. WPA
is an industry-supported, pre-standard version of 802.11i utilizing the Temporal Key Integrity Protocol
(TKIP), which fixes the problems of WEP, including using dynamic keys.
22. Wide Area Network (WAN)
A WAN consists of multiple LANs that are tied together via telephone services and / or fiber optic
cabling. WANs may span a city, a state, a country, or even the world.
23. Wired Equivalent Privacy (WEP)
Now widely recognized as flawed, WEP was a data encryption method used to protect the
transmission between 802.11 wireless clients and APs. However, it used the same key among all
communicating devices. WEP’s problems are well-known, including an insufficient key length and no
automated method for distributing the keys. WEP can be easily cracked in a couple of hours with
off-the-shelf tools.
24. Wireless LAN (WLAN)
A wireless LAN does not use cable to transmit signals, but rather uses radio or infrared to transmit
packets through the air. Radio Frequency (RF) and infrared are the commonly used types of wireless
transmission. Most wireless LANs use spread spectrum technology. It offers limited bandwidth,
usually under 11Mbps, and users share the bandwidth with other devices in the spectrum; however,
users can operate a spread spectrum device without licensing from the Federal Communications
Commission (FCC).
25. Fragment Threshold
The proposed protocol uses the frame fragmentation mechanism defined in IEEE 802.11 to achieve
parallel transmissions. A large data frame is fragmented into several fragments each of size equal to
fragment threshold. By tuning the fragment threshold value, we can get varying fragment sizes. The
determination of an efficient fragment threshold is an important issue in this scheme. If the fragment
threshold is small, the overlap part of the master and parallel transmissions is large. This means the
spatial reuse ratio of parallel transmissions is high. In contrast, with a large fragment threshold, the
overlap is small and the spatial reuse ratio is low. However high fragment threshold leads to low
fragment overhead. Hence there is a trade-off between spatial re-use and fragment overhead.
Fragment threshold is the maximum packet size used for fragmentation. Packets larger than the
size programmed in this field will be fragmented If you find that your corrupted packets or
asymmetric packet reception (all send packets, for example). You may want to try lowering your
fragmentation threshold. This will cause packets to be broken into smaller fragments. These small
fragments, if corrupted, can be resent faster than a larger fragment. Fragmentation increases
overhead, so you'll want to keep this value as close to the maximum value as possible.
26. RTS (Request To Send) Threshold
The RTS threshold is the packet size at which packet transmission is governed by the RTS/CTS
transaction. The IEEE 802.11-1997 standard allows for short packets to be transmitted without RTS/