Which of the following decides the role (sender or receiver) of a device on a network ?
A. | Line connection |
B. | Link connection |
C. | Line discipline |
D. | Link decision |
Option: C Explanation : Line discipline co-ordinate the link system. It determines which device can send and when it can send. Line discipline decides the role of a device on a network. Click on Discuss to view users comments. |
For stop-and-wait flow control, for n data packets sent, how many acknowledgments are needed ?
A. | n |
B. | n-1 |
C. | 2n |
D. | n + 1 |
Option: A Explanation : For stop-and-wait flow control for n data packets sent, in acknowledgements are needed. Click on Discuss to view users comments. |
The collision domain of tranditional Ethernet and Fast Ethernet respectively are
A. | 250m, 250m |
B. | 250m, 2500m |
C. | 2500m, 250m |
D. | 2500m, 2500m |
Option: C Explanation : Click on Discuss to view users comments. |
In a crossbar with 1000 crosspoints, how many statistically are in use at any time ?
A. | 100 |
B. | 250 |
C. | 500 |
D. | 1000 |
Option: B Explanation : A crossbar switch connects n inputs to m outputs in a grid, using electronic micro switches at each cross point, totally n x m cross points are required for crossbar switch. In general 25 percent of the cross points are used at a given time. The rest are idle so, totally 1000 cross points, so 25% = 250 crosspoint points are in use. Click on Discuss to view users comments. |
Which of the following is a time - division switch?
A. | TSI |
B. | TDM bus |
C. | crosspoint |
D. | both (a) and (b) |
Option: D Explanation : In time division switch, slots are divided by time switching accomplished using time division multiplexing (TDM) and another device called time slot interchange (TSI). Click on Discuss to view users comments. |