1.Give  one-two advantages of using RED over (a) drop-head (b) drop-tail (c)
Fair Queueing.

2. Harry Bovik proposes a new ``secure network'' mechanism for next generation
networks, where every pair of neighboring routers share a secret key and use
this key to encrypt/decrypt packet on each link. Would you recommend that the
NSF fund this proposal? Why

3. NASA sends out a Moon probe that sends out high quality video streams back
to earth. To save energy, the system communicates with earth for 10 seconds
every 30 minutes. The system uses a 1 Gbps high performance communication
channel and Van Jacobson's TCP protocol.  A separate TCP connection is set up
for each communication. Assuming there is no loss, estimate the average
throughput during the each 5 second interval. Make appropriate assumptions and
check on Google on constants that you need.

4. What is max-min fairness? Imagine 5 flows with demands of 10,8,7,2,1
arriving at a router with capacity 20. What are the max-min allocations
to the 5 flows?

5. In the ``End-to-End Routing Behavior in the Internet'' study, Vern Paxson
introduced two metrics to characterize two aspects of paths' stability.  a.
What are the two metrics? (i.e., what aspects of the routes do they
characterize?) b. Which one was most difficult for him to assess and why?

6. In the Multicast scheme suggested by Deering a. Does the sender need to know
the membership of the group?  b. Does the sender need to be a member of the
group?  c. What do table entries maintained by routers consist of?  d. How does
a participant join a group?