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Review Questions

1:What IEEE specification supports the highest speed wireless LAN operation?
A1: Answer: The IEEE 802.11a specification supports wireless LAN communication at speeds up to 54 Mbps.
2:The IEEE 802.11b wireless LANs operate in what frequency band?
A2: Answer: The IEEE 802.11b wireless LANs use the 2.4 GHz unlicensed ISM band.
3:Can Bluetooth devices and wireless LANs coexist?
A3: Answer: There are potential problems with wireless LANs that operate in the 2.4 GHz unlicensed ISM band. Wireless LANs operating in higher frequency bands should not interfere with Bluetooth devices.
4:For a large wireless LAN, what would be the preferred operating mode?
A4: Answer: The preferred operating mode for a large wireless LAN would be infrastructure mode, employing WAPs to connect wireless PC hosts to a wired LAN. The access points would also support PC hosts roaming seamlessly throughout a single facility.
5:What levels of encryption are available for wireless LANs?
A5: Answer: Wireless LANs can use either 64-, 128-, or 256-bit encryption.
6:What types of wireless LAN NICs are available?
A6: Answer: There are USB NICs, PC CardBus NICs, and PCI bus adapters that permit using PC CardBus NICs in desktop PCs.


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