In a broad sense, a railway track is an example of
A. | simplex |
B. | half-duplex |
C. | full-duplex |
D. | all of these |
Option: B Explanation : Click on Discuss to view users comments. |
Which of the following access control methods is probabilstic ?
A. | Polling |
B. | Contention |
C. | Token passing |
D. | Sliding window |
Option: D Explanation : Click on Discuss to view users comments. |
In stop-and-wait ARQ, if data 1 has an error, then receiver sends which frame ?
A. | NAK 0 |
B. | NAK 1 |
C. | NAK 2 |
D. | NAK |
Option: D Explanation :
Stop-and-wait ARQ (Automatic Repeat Request) is similar to stop - and - wait flow control protocol, but it includes retransmission of data in case of lost or damaged frames. Click on Discuss to view users comments. |
In which communication, poll/select method used to determine control of the line ?
A. | peer-to-peer |
B. | peer-to-primary |
C. | primary-to-peer |
D. | primary-to-secondary |
Option: D Explanation : Poll / select method is used in primary - to - secondary communication. ENQ/ACK is used in peer-to-peer communication method. Click on Discuss to view users comments. |
The secondary device in a multipoint configuration sends data in response to which of the following event ?
A. | ACK |
B. | ENQ |
C. | Poll |
D. | Sel |
Option: C Explanation : Poll/select is a line discipline method. The primary device always initiates communication with either a poll or select (SEL) frame. In this point the secondary device sends data in response to a poll frame event. Click on Discuss to view users comments. |