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Identifying 802.11 standards with their characteristics and speeds

Description: This lab exercise helps you to know the speed ranges of a 802.11 standards.

Instructions: 

1. Different 802.11 standards are given in the column A

2. Various speed ranges of a 802.11 standards are given in the column B

3. Match (drag and drop) the standards given on the column A with their speed ranges given on the column B

 

Explanation: 

802.11a standard provides wireless LAN bandwidth of up to 54Mbps in the 5GHz frequency spectrum. The 802.11a standard also uses orthogonal frequency division multiplexing (OFDM) for encoding  rather than FHSS or DSSS.

802.11b standard provides for bandwidths of up to 11 Mbps (with fallback rates of 5.5, 2, and 1 Mbps) in the 2.4G Hz frequency spectrum. This standard is also called Wi-Fi or 802.11 high rates. The 802.11b standard uses only DSSS for data encoding.

802.11g standard provides for bandwidths of 20 Mbps+ in the 2.4 GHz frequency spectrum. This offers a maximum rate of 54 Mbps and is backward compatible with 802.11b.

The newest of the wireless standards you need to know for the exam is 802.11n. The goal of the 802.11n standard is to significantly increase throughput in both the 2.4 GHz and the 5 GHz frequency range. The baseline goal of the standard was to reach speeds of 100 Mbps, but given the right conditions, it is estimated that the 802.11n speeds might be able to reach 600 Mbps. In practical operation, 802.11n speeds will be much slower.

Bluetooth Class 3 supports speeds up to 1m at 2.4GHz (1mW power output max)

Bluetooth Class 2 supports speeds up to 10m at 2.4GHz (2.5mW power output max)

Bluetooth Class 1 supports speeds up to 100m at 2.4GHz (100mW power output max).

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