Homework 1 ST: Security in Emerging Networks Due: July 24, 2018

Homework 1 ST: Security in Emerging Networks Due: July 24, 2018

Instructions:

I. You must submit your homework electronically only in .pdf format. II. I will let you know by the end of the week how to submit.

1. (a) Explain how fairness has been provided in IEEE 802.11

(b) Explain how an attacker can take advantage of this distributed algorithm to gain more bandwidth.

(c) Explain how fairness can be enforced if a station tries to gain more bandwidth.

2. Explain how the hidden nodes and exposed nodes phenomenon can be used by an attacker to gain more access in 802.11.

3. Explain how one station can jam another station to gain more bandwidth in 802.11. Give an example.

4. Explain with sufficient detail and an example as how

(a) Frequency Hopping Spread Spectrum (FHSS) protects against jamming or eavesdropping.

(b) Direct Sequence Spread Spectrum (DSSS) protects against jamming or eavesdropping.

CS 4/69995 July 24, 2018 Page 1 of ??


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