CNT(data com) multiple choice questions Question 1 The developer of a file trans
ID: 3768897 • Letter: C
Question
CNT(data com) multiple choice questions
Question 1
The developer of a file transfer application-layer protocol that works over the TCP/IP stack has to select a transport layer that works on top of IP v4. What is the correct answer from the following?
a. select UDP because the file transfer protocol can run as a user-level process, not like with TCP or SCTP
b. select TCP because it already implements error, flow, and congestion control, even though path capacity may not be used optimally
c. select UDP because datagrams are not lost, nor reordered and implementing protocols on top of a best effort datagram transport is very simple
d. cannot use SCTP since this protocol does not do error and flow control, just like UDP
Question 2
What is the drawback of Clark's solution to TCP's silly window syndrome ?
a. It creates a situation where the sender must limit its transmissions to 1 byte at a time.
b. It makes the sender wait longer for ACK packets, potentially causing a timeout and forcing a retransmission.
c. it creates additional traffic with ACK packets sent by the receiver to the sender that announce a window of 0.
d. It has no drawbacks.
Question 3
How slow is actually TCP's slow start congestion control algorithm?
a. It's not slow at all. The congestion window can actually grow exponentially in time, assuming no delayed ACKs, and assuming that each segment is acknowledged individually.
b. The congestion window starts with cwnd=1 and then it is incremented once every second, leading to a linear increase over time.
c. Yes, it's sooo slow, especially when taking the final exam and loading the questions page from bb.fau.edu...
d. During slow start the congestion window grows with 1/cwnd (in bytes) for each ACK received.
Explanation / Answer
CNT(data com) multiple choice questions Question 1 The developer of a file trans