Which Ethernet naming defines 10 Gigabit Ethernet over single-mode up to 40 kilometers?

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Multiple Choice

Which Ethernet naming defines 10 Gigabit Ethernet over single-mode up to 40 kilometers?

Understanding Ethernet fiber naming helps match the reach and fiber type to a scenario. The 10GBASE suffix means 10 Gigabit Ethernet, and the letter-like suffixes indicate how far the signal can travel over fiber: SR is short-range over multimode fiber, LR is long-range over single-mode fiber (typically up to about 10 km), and ER is extended reach over single-mode fiber (up to around 40 km). The copper-based option is 10GBASE-T, which runs over twisted pair copper, not fiber. For a single-mode fiber link that can run up to 40 kilometers, the 10GBASE-ER designation is the one that fits. The other options either use multimode fiber (SR), have shorter reach on single-mode (LR), or use copper (T).

Understanding Ethernet fiber naming helps match the reach and fiber type to a scenario. The 10GBASE suffix means 10 Gigabit Ethernet, and the letter-like suffixes indicate how far the signal can travel over fiber: SR is short-range over multimode fiber, LR is long-range over single-mode fiber (typically up to about 10 km), and ER is extended reach over single-mode fiber (up to around 40 km). The copper-based option is 10GBASE-T, which runs over twisted pair copper, not fiber.

For a single-mode fiber link that can run up to 40 kilometers, the 10GBASE-ER designation is the one that fits. The other options either use multimode fiber (SR), have shorter reach on single-mode (LR), or use copper (T).

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