Structure Cabling Volume Two Practice Test

Performance requirements for Cat 6A cables, connectors, basic links, and channels are specified at frequencies up to?

400 MHz 600 MHz 800 MHz 500 MHz

Correct Answer:

500 MHz

Explanation:

Cat6A is designed to guarantee its performance up to 500 MHz, which is the bandwidth at which the standard specifies all the transmission parameters for cables, connectors, basic links, and channels. This higher frequency is what enables reliable 10 Gigabit Ethernet over copper for typical link lengths, since crosstalk, return loss, and insertion loss must remain within limits across the entire 500 MHz range. The other numbers don’t define the upper limit of Cat6A’s guaranteed performance: 400 MHz is merely below the maximum, while 600 MHz and 800 MHz exceed the Cat6A specification.

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