Wireless Mobile Communications » Wireless Local Area Networks Wlans
What is the range of asynchronous user data rates provided by HIPER-LAN?

A. 1-100 mbps
B. 50-100 mbps
C. 1-20 mbps
D. 500 mbps to 1 gbps

Explanation: HIPER-LAN provides asynchronous user data rates of between 1 to 20 Mbps, as well as time bounded messaging of rates of 64 kbps to 2.048 Mbps. It uses 5.2 GHz and 17.1 GHz frequency bands.

Which of the following spread spectrum techniques were used in the original IEEE 802.11 standard?

A. Fhss and dsss
B. Thss and fhss
C. Thss and dsss
D. Hybrid technique

Explanation: Original IEEE 802.11 used both the approaches of FHSS (Frequency Hopping Spread Spectrum) and DSSS (Direct Sequence Spread Spectrum). But from late 2001s, only DSSS modems are used within IEEE 802.11.

Which of the following is the 802.11 High Rate Standard?

A. Ieee 802.15
B. Ieee 802.15.4
C. Ieee 802.11g
D. Ieee 802.11b

Explanation: IEEE 802.11b was a high rate standard approved in 1999. It provided new data rate capabilities of 11 Mbps, 5.5 Mbps in addition to the original 2 Mbps and 1 Mbps user rates of IEEE 802.11.

Which of the following is not a standard of WLAN?

A. Hiper-LAN
B. Hiperlan/2
C. Ieee 802.11b
D. Amps

Explanation: AMPS is a standard of first generation network. HIPERLAN is a WLAN standard developed in Europe in mid 1990s. HIPERLAN/2 is also developed in Europe that provides upto 54 Mbps of user data.

HIPER-LAN stands for ____________

A. High precision radio local area network
B. High performance radio local area network
C. High precision radio land area network
D. Huge performance radio link access node

Explanation: HIPER-LAN stands for High Performance Radio Local Area Network. It was developed in Europe in mid 1990s. It was intended to provide individual wireless LANs for computer communication.