DSL transmission rates' range:

A$.$ Up to $25$ Mbps downstream and $2\mathrm{.}5$ Mbps upstream

B$.$ Up to $42\mathrm{.}8$ Mbps and upstream rates of up to $30\mathrm{.}7$ Mbps $.$

C$.2-10$Mbps upload; $10-20$ Mbps download.

D$.$ All the above

E$.$ None of the above.

Suppose there is exactly one packet switch between a sending host and a receiving host. The transmission rates between the sending host and the switch and between the switch and the receiving host are $R_1$ and $R_2,$ respectively. Assuming that the switch uses store$-$andforward packet switching, what is the total end$-$to$-$end delay to send a packet of length $L?($Ignore queuing, propagation delay, and processing delay.$)$

Network architecture dictates the broad structure of the application architecture.

A$.$ True

B$.$ False

The client is the process that waits to be contacted.

A$.$ True

B$.$ False

Consider a TCP connection between Host A and Host

B$.$ Suppose that the TCP segments traveling from Host A to Host $B$ have source port number $x$ and destination port number $y.$ What are the source and destination port numbers for the segments traveling from Host $B$ to Host A$?$

A$.$ Source port number $x$ and destination port number $y.$

B$.$ Source port number y and destination port number $x.$

C$.$ All the above

D$.$ None of the above

In a P$2$P file$-$sharing application, the peer that is sending a file is typically the client.

A$.$ True

B$.$ False

In BitTorrent, suppose Alice provides chunks to Bob throughout a $30-$second interval. Will Bob necessarily return the favor and provide chunks to Alice in this same interval? Why or why not?

A$.$ It is not necessary that Bob will also provide chunks to Alice. Alice has to be in the top

B$.4$ neighbors of Bob for Bob to send out chunks to her

C$.$ This might not occur even if Alice provides chunks to Bob throughout a $30-$second interval.

D$.$ All the above

E$.$ None of the above