1. (Important: Assume RTS/CTS mechanism is used) Suppose there are two ISPs providing WiFi access in...

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1. (Important: Assume RTS/CTS mechanism is used) Suppose thereare two ISPs providing WiFi access in the same cafÃ©, with each ISPoperating its own AP.
a. If each ISP has configured its AP to operate over the samechannel, channel 11. Will the 802.11 protocol completely break downin this situation? Discuss what occurs when two devices, eachassociated with a different AP, attempt to transmit at the sametime.
b. Suppose now one AP changes its channel to channel 1, and theother AP still operates over channel 11. How do you answer thechange?
2. In IEEE 802.15.4, when BI=SD in superframe, what is the dutycycle? Can you achieve a duty cycle of 1%? And how?

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Solution a The two APs will typically have different SSIDs and MAC addresses A wireless station arriving to the caf will associate with one of the SSIDs that is one of the APs After association there is a See Answer

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