Consider the following statements : A. High speed Ethernet works on optic…
2016
Consider the following statements :
A. High speed Ethernet works on optic fiber.
B. A point to point protocol over Ethernet is a network protocol for encapsulating PPP frames inside Ethernet frames.
C. High speed Ethernet does not work on optic fiber.
D. A point to point protocol over Ethernet is a network protocol for encapsulating Ethernet frames inside PPP frames.
Which of the following is correct ?
- A.
A and B are true; C and D are false.
- B.
A and B are false; C and D are true.
- C.
A, B, C and D are true.
- D.
A, B, C and D are false.
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Correct answer: A
Answer: The statements "High speed Ethernet works on optic fiber." and "A point to point protocol over Ethernet is a network protocol for encapsulating PPP frames inside Ethernet frames." are true; the other two statements are false.
"High speed Ethernet works on optic fiber." — True. Many high-speed Ethernet standards (for example 100BASE-FX, 1000BASE-X and other Gigabit variants) use fiber-optic media for long-distance or high-bandwidth links.
"A point to point protocol over Ethernet is a network protocol for encapsulating PPP frames inside Ethernet frames." — True. PPPoE (Point-to-Point Protocol over Ethernet) carries PPP frames within Ethernet frames to provide PPP services over an Ethernet link.
"High speed Ethernet does not work on optic fiber." — False. This directly contradicts the true statement that high-speed Ethernet can and does use fiber-optic media.
"A point to point protocol over Ethernet is a network protocol for encapsulating Ethernet frames inside PPP frames." — False. The encapsulation direction is reversed: PPPoE encapsulates PPP frames inside Ethernet frames, not Ethernet frames inside PPP frames.
Conclusion: The correct selection is the one stating that the first two statements are true and the last two are false.