1. Maximum data rate of a channel for a noiseless 3-kHz binary channel is

3000 bps

1500 bps

6000 bps

none of these

2. Number of cross point needed for 10 lines in a cross point switch which is full duplex in nature and there are no self-connection is

100

45

8

. 28

3. The systems that can be used in both priority and non-priority modes is

TDM

Register insertion

Carrier sense systems

all of these

4. In the carrier sense network, if prevailing condition is a 'channel busy', then technique used is

non-persistent then it results in randomised wait and sense

1-persistent then the channel is continually sensed

p-persistent then randomised retransmission is done

both (a) and (b)

5. Start and stop bits are used in serial communication for

error detection

error correction

synchronization

slowing down the communication

6. Slotted ALOHA

divide time into discrete intervals

require global time synchronization

both (a) and (b)

none of these

7. Working of the WAH generally involves

telephone lines

micro waves

satellites

All of these

8. Which of the following program is used to copy files to or from another using time sharing system over a single link ?

VMTP

TFTP

UUCP

UART

9. A station in a network forward incoming packets by placing them on its shortest output queue. What routing algorithm is being used ?

Hot potato routing

Floding

Static routing

Delta routing

10. Four bits are used for packed sequence numbering in a sliding window protocol used in a computer network. What is the maximum window size ?

4

8

15

16