Computer Networking
A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. If Delta modulation is selected, then how many bits per second are actually sent?

32 kbps
None of these
8 kbps
64 kbps.
128 kbps

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Computer Networking
How does a host on an Ethernet LAN know when to transmit after a collision has occurred?1. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.2. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.3. You can improve the CSMA/CD network by adding more hubs.4. After a collision, the station that detected the collision has first priority to resend the lost data.5. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.

1 and 3
2 and 5
1,3 and 4
2 and 4

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Computer Networking
Which of the following statements is correct for the use of packet switching?

by employing wide bandwidth circuits for the trunk networks substantial economies through extensive sharing of capacity could be achieved.
the subdivision of information into individually addressed packets in conjunction with alternative routing arrangement enabled the transmission path to be altered in the event of congestion or individ
None of these
All of these
the employment of additional intelligence within the network enabled more sophisticated error control and link control procedures to be applied

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