AWS Certified Advanced Networking – Specialty (ANS-C00) — Question 280

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?

Answer options

• 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

Correct answer: C

Explanation

AWS Direct Connect requires single-mode fiber-optic connections to link your network to AWS. Specifically, it supports 1000BASE-LX for 1 gigabit Ethernet and 10GBASE-LR for 10 gigabit Ethernet. Options using multi-mode fiber or other transceiver standards (like 10GBASE-ER) do not meet the strict physical layer requirements for Direct Connect.