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Read Chapter 7 in the book “Computer Networking: A Top-Down Approach”
1. [3 points] What are the di erences between the following types of wireless channel impairments- path
loss”, multipath propagation” and interference” from other sources?
2. [4 points] What are the di erences between a master device in a bluetooth network and base station in
802.11 network?
3. [3 points] If a node has a wireless connection to the Internet, does that node have to be mobile? Suppose
that a user with a laptop walks around her house with her laptop, and always accesses the Internet
through the same access point. Is the user mobile from a network standpoint? Explain.
4. [3 points] What are the purposes of the HLR and VLR in GSM networks? What elements of mobile IP
are similar to the HLR and VLR?
5. [5 points] What feature in 3G and 4G network made them popular in terms of massive user and connected
devices? What are the roles EPC in 4G architecture?
6. [2 points] Why is a packet that is received after its scheduled playout time considered lost?
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