Which is not a copper twisted-pair cable standard?

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Multiple Choice

Which is not a copper twisted-pair cable standard?

Explanation:
Copper twisted-pair cabling standards define the physical Ethernet media and jacket types used for wired networks. Cat5e and Cat6a are clear examples, specifying performance and frequency ranges for copper cables. Plenum-rated cable refers to a fire-safety jacket requirement for cables installed in air-handling spaces, and it also applies to copper cabling. In contrast, 802.11a is a wireless networking standard that governs radio frequencies and modulation for Wi‑Fi; it does not define any copper cable at all. Therefore, it is not a copper twisted-pair cable standard.

Copper twisted-pair cabling standards define the physical Ethernet media and jacket types used for wired networks. Cat5e and Cat6a are clear examples, specifying performance and frequency ranges for copper cables. Plenum-rated cable refers to a fire-safety jacket requirement for cables installed in air-handling spaces, and it also applies to copper cabling. In contrast, 802.11a is a wireless networking standard that governs radio frequencies and modulation for Wi‑Fi; it does not define any copper cable at all. Therefore, it is not a copper twisted-pair cable standard.

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