Networking – Section 5

36. 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.

A. Network collisions occur
B. Repeaters cannot increase the signal strength sufficiently
C. Cable terminators do not reflect the signal properly
D. Cable terminators do not absorb the signal properly
E.  “Line echo” occurs due to the impedance of the cable

Correct Answer: A. Network collisions occur

37. In a _____ topology, if there are n devices in a network, each device has n – 1 ports for cables.

A. ring
B. bus
C. star
D. mesh
E. None of the above

Correct Answer: D. mesh

38. Typewriter terminals can print computer-generated data at a rate of

A. 10 characters per second
B. 120 characters per second
C. 120 characters per minute
D. 1200 characters per minute
E. None of the above

Correct Answer: B. 120 characters per second

39. To avoid transmission errors, a check figure is calculated by the

A. transmitting computer
B. receiving computer
C. both (a) and (b)
D. Start and stop bit
E. None of the above

Correct Answer: C. both (a) and (b)

40. What is the first octet range for a class A IP address?

A. 1 – 126
B. 192 – 255
C. 192 – 223
D. 1 – 127
E. 128 – 191

Correct Answer: A. 1 – 126

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