16. How to implement a network medium that is not susceptible to EMI. Which type of cabling should you use?

A. Thicknet coax
B. Thinnet coax
C. Category 5 UTP cable
D. Fiber-optic cable

Correct Answer: D. Fiber-optic cable

17. Segmentation of a data stream happens at which layer of the OSI model?

A. Physical
B. Data Link
C. Network
D. Transport

Correct Answer: D. Transport

18. When data is encapsulated, which is the correct order?

A. Data, frame, packet, segment, bit
B. Segment, data, packet, frame, bit
C. Data, segment, packet, frame, bit
D. Data, segment, frame, packet, bit

Correct Answer: C. Data, segment, packet, frame, bit

19. Which of the following are unique characteristics of half-duplex Ethernet when compared to full-duplex Ethernet?

1. Half-duplex Ethernet operates in a shared collision domain.
2. Half-duplex Ethernet operates in a private collision domain.
3. Half-duplex Ethernet has higher effective throughput.
4. Half-duplex Ethernet has lower effective throughput.

A. 2 only
B. 1,2 and 3
C. 1 and 4
D. 4 only

Correct Answer: C. 1 and 4

20. What type of RJ45 UTP cable is used between switches?

A. Straight-through
B. Crossover cable
C. Crossover with a CSU/DSU
D. Crossover with a router in between the two switches

Correct Answer: B. Crossover cable

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