NWC203c Mooc2 Questions And Answers With Verified Solutions
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Course
NWC203c
Institution
NWC203c
NWC203c Mooc2 Questions And Answers With Verified Solutions
In networks where errors are infrequent, which approach is favored for efficiency?
2 points
Hop-by-hop approach
End-to-end approach
Either one of the above
Neither one of the above ANS End-to-end approach
Which of the following s...
NWC203c Mooc2 Questions And Answers With
Verified Solutions
In networks where errors are infrequent, which approach is favored for efficiency?
2 points
Hop-by-hop approach
End-to-end approach
Either one of the above
Neither one of the above ANS End-to-end approach
Which of the following statements is true about the stop-and-wait ARQ protocol?
2 points
Stop-and-wait is only efficient if the link bandwidth is low
Stop-and-wait is only efficient if the link delay-bandwidth product is small
Stop-and-wait is only efficient if the link delay-bandwidth product is large
Stop-and-wait is only efficient if the link bandwidth is high ANS Stop-and-wait is only efficient
if the link delay-bandwidth product is small
Consider a situation where an interactive application produces a packet to send each keystroke from
the client and the server echoes each keystroke that it receives from the client. Which of following
strategies for sending ACK frames in a Go-Back-N is appropriate for the situation?
2 points
send an ACK frame immediately after each frame is received
send an ACK frame after every other frame is received
send an ACK frame when the next piggyback opportunity arises
Any one of the above ANS send an ACK frame when the next piggyback opportunity arises
Consider a bulk data transfer application where a server sends a large file that is segmented in a
number of full-size packets that are to be transferred to the client. Assume the channel has a low
probability of error. Which of following strategies for sending ACK frames in a Go-Back-N is
appropriate for the situation?
,2 points
send an ACK frame after every other frame is received
Any one of the above
send an ACK frame when the next piggyback opportunity arises
send an ACK frame immediately after each frame is received ANS send an ACK frame after
every other frame is received
Consider Selective Repeat ARQ flow control protocol. In the following scenario, what should be the
value of frame number x at receiver B?
3
2
4 ANS 4
ARQ protocols combine error detection, retransmission and sequence numbering to provide
reliability
1 point
True
False ANS True
A service model specifies a level of performance that can be expected in the transfer of information.
1 point
True
False ANS True
A service offered at a given layer can include which of the following feature(s)
1 point
Sequencing
Reliability
Timing
, All of the above ANS All of the above
Digital communication technologies may introduce errors in communication, which of the following
can be used to provide reliable communication
1 point
UDP
HDLC
DNS
TCP ANS HDLC
TCP
Ensuring that information is not altered during transfer is associated with
1 point
Authentication
Availability
Integrity
Confidentiality ANS Integrity
1.
Question 1
Given 3 bits for sequence numbers, what is the maximum sliding window size at the receiver in Go
Back 3 ARQ?
2 points
3
7
8
None of the above ANS 7
2.
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