Chapter 6

1:

Why does a wireless MAN offer good return on investment?

A1:

Answer: Wireless MANs eliminate the need to install expensive cabling or lease communications circuits.

2:

A learning bridge forwards all packets. True or false?

A2:

Answer: False.

3:

What is the primary difference between a bridge and an access point?

A3:

Answer: A bridge connects networks together. An access point connects end users.

4:

What are examples of semidirectional antennae?

A4:

Answer: Patch and Yagi.

5:

In regards to beamwidth, what is the primary difference between a semidirectional and highly directional antenna?

A5:

Answer: A highly directional antenna has a much narrower beamwidth, which increases range if the power remains constant.

6:

What is an example of a highly directional antenna?

A6:

Answer: Dish antenna.

7:

What polarization would be most effective at a receiver if the transmitter were using vertical polarization?

A7:

Answer: Vertical polarization.

8:

What are the advantages of using point-to-multipoint systems versus point-to-point for interconnecting multiple sites?

A8:

Answer: Point-to-multipoint can be less expensive and easier to add more sites.

9:

What are the advantages of using packet radio for wireless MANs?

A9:

Answer: Packet radio routers don't require any cabling between them, and the system is relatively survivable because packets can take a different route if a router becomes inoperative.

10:

Which standards do wireless MANs employ?

A10:

Answer: 802.11, Wi-Fi, and 802.16.



     
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