Computer Networking
Which of the following conditions is used to transmit two packets over a medium at the same time?

None of these
Collision
Asynchronous
Contention
Synchronous

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Computer Networking
TCP is:

Connectionless and unreliable
Operates at the Data Link layer
Connection orientated and reliable
None of these
Connection orientated and unreliable

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Computer Networking
Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases.

"Line echo" occurs due to the impedance of the cable
Cable terminators do not absorb the signal properly
Network collisions occur
Repeaters cannot increase the signal strength sufficiently
Cable terminators do not reflect the signal properly

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