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
1,3 and 4
2 and 4
2 and 5

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Computer Networking
The packets switching concept was first proposed

in the late 1950s for Defense Ministry of US
in the early 1960s for military communication systems, mainly to handle speech
All of these
None of these
in the late 1980s for the Defense Ministry of US.

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Computer Networking
Bus is

the condition when two or more stations attempt to use the same channel at the same time
one or more conductors that some as a common connection for a related group of devices
a collection of interconnected functional units that provides a data communications service among stations attached to the network
None of these
a continuous frequency capable of being modulated or impressed with a second signal

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