單項選擇題What is the maximum data rate specified by the IEEE 802.11B standard for wireless LANS?（）

A. 10 Mbps
B. 11 Mbps
C. 54 Mbps
D. 100 Mbps
E. none of the above


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1.單項選擇題Which IEEE standard is used to define Wi-Fi?（）

A. IEEE 802.3
B. IEEE 802.5
C. IEEE 802.11h
D. IEEE 802.11c
E. IEEE 802.11

2.單項選擇題Which of the following data network would you implement if you wanted a wireless network that had a relatively high data rate, but was limited to very short distances?（）

A. Broadband personal comm. Service (PCS)
B. Broadband circuit
C. Infrared
D. Spread spectrum
E. Cable

3.多項選擇題When you compare the differences between half-duplex and full-duplex Ethernet,which of the following characteristics are exclusive to half-duplex?（）

A. Half-duplex Ethernet operates in a shared collision domain.
B. Half-duplex Ethernet operates in an exclusive broadcast domain.
C. Half-duplex Ethernet has efficient throughput.
D. Half-duplex Ethernet has lower effective throughput.
E. Half-duplex Ethernet operates in an exclusive collision domain.

4.多項選擇題What are the differences between full-duplex Ethernet and half-duplex Ethernet?（）

A. Half-duplex Ethernet operates in a shared collision domain.
B. Full-duplex Ethernet has a lower effective throughput.
C. Half-duplex Ethernet operates in a private collision domain.
D. Full-duplex Ethernet allows two-way communication.
E. Half-duplex Ethernet operates in a private broadcast domain.

5.多項選擇題Why is full-duplex Ethernet superior to its single-duplex counterpart?（）

A. It uses inexpensive hubs
B. It operates without collisions
C. It operates on switches
D. It provides faster data transfer
E. It utilizes fewer wiring pairs