How do 1000BASE-LX/LH and 1000BASE-ZX differ in supported fiber link distance?
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Correct answer: 1000BASE- LX/LH is supported on links up to 10km, and 1000Base-ZX operates over links up to 70 km.
Why this is the answer
1000BASE-LX/LH is a Gigabit Ethernet standard that uses long-wavelength laser optics and supports distances up to 10 km over single-mode fiber and up to 550 meters over multimode fiber. 1000BASE-ZX is another Gigabit Ethernet standard designed for extended reach, typically using single-mode fiber to achieve distances up to 70 km. The other options are incorrect because they misstate the supported distances or fiber types. While 1000BASE-LX/LH can work with both fiber types (with specific distance limitations), 1000BASE-ZX is primarily for long-haul single-mode. The conditioning patch cable is for specific multimode applications with LX transceivers, not a general requirement for ZX. The 1000km distance is inaccurate for 1000BASE-ZX.
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