In which circuit switching, delivery of data is delayed because data must be stored and retrieved from RAM
A. | space-division |
B. | time-division |
C. | virtual |
D. | packet |
Option: B Explanation : |
If a network designer wants to connect 5 routers as point-to-point simplex line, then total number of lines required would be
A. | 5 |
B. | 10 |
C. | 20 |
D. | 32 |
Option: B Explanation : If 1st router connect with other 4 routers then total for 1st=4 same as 2nd router connect with 3 routers so total for 2nd=3 same as for 3rd router connect with 2 routers so total =2 same as 4th router with 1 so total=1 so total simplex lines will be = 4+3+2+1=10. So answer is 'B'. |
To interface a computer terminal with a modem, required physical layer standard is
A. | RS 424 - A |
B. | RS 232 - C |
C. | RS 449 |
D. | Either (b) or (c) |
Option: D Explanation : |
A 100 km long cable runs at the T1 data rate. The propagation speed in the cable is half the speed of light. How many bits is in the cable ?
A. | 572 |
B. | 672 |
C. | 772 |
D. | 873 |
Option: C Explanation : Propagation speed in the cable = 200,000 km/sec = 200 km/psec. Hence 100 km cable will be filled in 500 psec. This corresponds to four 193-bit frames, or 772 bits on the cable. |