Data Communication and Networking – Data Link Layer – Data Link Control – Flow Control MCQs

This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “Data Link Layer – Data Link Control – Flow Control ”.
 

1
. In the sliding window method of flow control, the receiver window _______ size when frames are received
  • increases in
  • decreases in
  • doubles in
  • remains its original
2
. In the sliding window method of flow control, the receiver window _______ size when an ACK is sent
  • increases in
  • decreases in
  • doubles in
  • remains its original
3
. A sender has a sliding window of size 15. The first 15 frames are sent. The first ACK received is ACK 15. What frame(s) has the receiver accepted?
  • frame 15
  • frame 14
  • frames 0 to 15
  • frames 0 to 14
4
. A sender has a sliding window of size 15. The first 15 frames are sent. The first ACK received is ACK 15. What frame is the receiver expecting?
  • frame 14
  • frame 15
  • frame 16
  • frame 0
5
. A sender has a sliding window of size 15. The first 15 frames are sent. How many frames are in the window now?
  • 0
  • 1
  • 14
  • 15
6
. A sender has a sliding window of size 15. The first 10 frames are sent. How many frames are in the window now?
  • 4
  • 5
  • 6
  • 10
7
. A sender has a sliding window of size 15. The first 15 frames are sent. The receiver receives 10 frames. How many frames can the receiver still receive?
  • 1
  • 5
  • 6
  • 15
8
. A sender has a sliding window of size 15. The first 15 frames are sent. The receiver sends an ACK 10. How many spaces does the receiver window expand?
  • 5
  • 9
  • 10
  • 15
9
. A sender has a sliding window of size 15. The first 15 frames are sent. The receiver sends an ACK 10 and expands its window. What is the size of the receiver window now?
  • 5
  • 9
  • 10
  • 15
10
. The receiver's window in a sliding window protocol expands when _______.
  • an ACK is received
  • an ACK is sent
  • a frame is sent
  • a frame is received
11
. The sender's window in a sliding window protocol expands when _______.
  • an ACK is received
  • an ACK is sent
  • a frame is sent
  • a frame is received
12
. The stop-and-wait flow control method is the same as the sliding window method with a window size of _______.
  • 0
  • 1
  • 2
  • none of the above
13
. Flow control is mainly a function of the _______ layer
  • application
  • presentation
  • session
  • data link
14
. _______ is the regulation of the amount of data that can be sent.
  • Line discipline
  • Flow control
  • Error control
  • All of the above
15
. Which data link layer function answers the question: How much data may be sent?
  • line discipline
  • flow control
  • error control
  • session management
16
. Stop-and-wait is a _______ technique
  • line discipline
  • flow control
  • error control
  • session management
17
. Sliding window is a _______ technique
  • line discipline
  • flow control
  • error control
  • session management
18
. In the stop-and-wait method of flow control, the sender sends _______ at a time
  • a variable number of frames
  • only one frame
  • a set number of frames
  • two frames
19
. In the sliding window method of flow control, the sender may send _______ at a time.
  • several frames
  • only one frame
  • a set number of frames
  • two frames
20
. In the stop-and-wait method of flow control, after the receiver receives a data frame, _______ frame can be sent
  • an ACK
  • a NAK
  • an EOT
  • a or b
21
. What is the main disadvantage of stop-and-wait flow control?
  • unreliable
  • inefficient
  • attenuation
  • dropped packets
22
. In the stop-and-wait method of flow control, if 100 good data frames are sent and received, how many ACK frames have been sent by the receiver?
  • 99
  • 100
  • 101
  • 200
23
. In the sliding window method of flow control, if 100 good data frames are sent and received, how many ACK frames have been sent by the receiver?
  • 99
  • 100
  • 101
  • some number less than or equal to 100
24
. In the sliding window method of flow control, if the frame numbers range from 0 to 31, the size of the window is _______ frames.
  • 16
  • 31
  • 32
  • 33
25
. In the sliding window method of flow control, if the frame numbers range from 0 to 63, the size of the window is _______ frames.
  • 32
  • 63
  • 64
  • 65
26
. In the sliding window method of flow control, the sender window _______ size when frames are sent.
  • increases in
  • decreases in
  • expands in
  • remains its original
27
. In the sliding window method of flow control, the sender window _______ size when an ACK is received.
  • increases in
  • decreases in
  • doubles in
  • remains its original

 
 
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