a. Describe the role of the beacon frames in 802.11.

b. Describe how the RTS threshold works.

c. What are the differences between a master device in a Bluetooth network and a base station in an 802.11 network?

d. Suppose there are two ISPs providing Wi-Fi access in a particular caf, with each ISP operating its own AP and having its own IP address block.

-Further, suppose that by accident, each ISP has configured its AP to operate over channel 11. Will the 802.11 protocol completely break down in this situation? Discuss what happens when two stations, each associated with a different ISP, attempt to transmit at the same time.

-Now suppose that one AP operates over channel 1 and the other over channel 11. How do your answers change?

e. Describe the format of the 802.15.1 PAN frame. You will have to do some reading outside of the text to find this information. Is there anything in the frame format that inherently limits the number of active nodes in an 802.15.1 network to eight active nodes? Explain

f. What are the differences between the following types of wireless channel impairments: path loss, multipath propagation, interference from other sources?

g. What are the four types of wireless networks identified in our taxonomy in Section 7.1? Which of these types of wireless networks have you used?

h. What does it mean for a wireless network to be operating in "infrastructure mode?" If the network is not in infrastructure mode, what mode of operation is it in, and what is the difference between that mode of operation and infrastructure mode?