Which technology provides 10 Gigabit Ethernet over multimode fiber with a maximum distance of 400 meters?

Which technology provides 10 Gigabit Ethernet over multimode fiber with a maximum distance of 400 meters?

• A. Cat6a
• B. Plenum-Rated Cable
• C. 10GBASE-SR
• D. 802.11a

Answer: (C)

10GBASE-SR provides 10 Gigabit Ethernet over multimode fiber for a reach of about 400 meters. It uses 850 nm light and multimode fiber (often OM3) optimized for short-range high-speed links, making it the standard choice when you need 10 Gbps over MMF within that distance. The other options don’t fit because Cat6a is copper cabling, not fiber (and supports 10G over copper only to shorter distances); plenum-rated cable refers to jacket safety in air handling spaces rather than the transmission medium; and 802.11a is a wireless standard, not a fiber-based Ethernet technology.

10GBASE-SR provides 10 Gigabit Ethernet over multimode fiber for a reach of about 400 meters. It uses 850 nm light and multimode fiber (often OM3) optimized for short-range high-speed links, making it the standard choice when you need 10 Gbps over MMF within that distance. The other options don’t fit because Cat6a is copper cabling, not fiber (and supports 10G over copper only to shorter distances); plenum-rated cable refers to jacket safety in air handling spaces rather than the transmission medium; and 802.11a is a wireless standard, not a fiber-based Ethernet technology.