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Exam ANS-C00 topic 1 question 276 discussion

Exam question from Amazon's ANS-C00
Question #: 276
Topic #: 1
[All ANS-C00 Questions]

Which of the following physical layer standards is required for connection to AWS Direct Connect over a standard 1 gigabit or 10 gigabit Ethernet fiber-optic cable?

  • A. Single mode fiber, 1000BASE-LX for 1 gigabit Ethernet, or 10GBASE-ER for 10 gigabit Ethernet
  • B. Multi mode fiber, 1000BASE-LX for 1 gigabit Ethernet, or 10GBASE-ER for 10 gigabit Ethernet
  • C. Single mode fiber, 1000BASE-LX for 1 gigabit Ethernet, or 10GBASE-LR for 10 gigabit Ethernet
  • D. Multi mode fiber, 1000BASE-SX for 1 gigabit Ethernet, or 10GBASE-SR for 10 gigabit Ethernet
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Suggested Answer: C 🗳️
Connections to AWS Direct Connect require single mode fiber, 1000BASE-LX (1310nm) for 1 gigabit Ethernet, or 10GBASE-LR (1310nm) for 10 gigabit Ethernet.
Reference:
http://docs.aws.amazon.com/directconnect/latest/UserGuide/Welcome.html
by eeghai7thioyaiR4 at March 17, 2021, 1:19 p.m.
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eeghai7thioyaiR4
Highly Voted 3 years, 7 months ago
Ans: C LX is a synonym of single mode 1Gbps, and LR a synonym of single mode 10Gbps (for fiber optic only, not copper-base cable, indeed)
upvoted 6 times
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Blueocean
Most Recent 3 years, 2 months ago
Answer C https://docs.aws.amazon.com/directconnect/latest/UserGuide/Welcome.html#overview-components
upvoted 2 times
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