Chapter 2

1:

Which wireless NIC form factors are best for small wireless computer devices?

A1:

Answer: PC Card, Mini-PCI, and CompactFlash.

2:

What are examples of elements that impair the propagation of wireless communications signals through the air medium?

A2:

Answer: Rain, snow, smog, and smoke.

3:

What is the primary purpose of a base station?

A3:

Answer: Interfaces the wireless communications signals traveling through the air medium to a wired network.

4:

What are common features of wireless middleware?

A4:

Answer: Optimization techniques, intelligent restarts, data bundling, screen shaping and reshaping, and end-system support.

5:

On what layers of the OSI reference model do wireless networks operate?

A5:

Answer: Physical layer and data link layer.

6:

How is throughput different from data rate?

A6:

Answer: Throughput doesn't include overhead of protocols.

7:

True or false: A computer device stores data in analog form.

A7:

Answer: False.

8:

A wireless NIC must convert the information into what type of signal before transmission through the air medium?

A8:

Answer: Analog.

9:

Which medium access protocol is common with wireless networks?

A9:

Answer: CSMA.

10:

Explain how the ARQ form of error control works.

A10:

Answer: The receiving wireless NIC performs error checking and sends a request to the sending wireless NIC to retransmit the frame if errors are found.



     
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