Implementing which of the following standards would BEST help to prevent unauthorized connections to the wired network?

The network support team is responsible for managing connections in a large, multipurpose venue where maintaining physical security is difficult.

Implementing which of the following standards would BEST help to prevent unauthorized connections to the wired network?
A . 802.1X
B . 802.1q
C . 802.3at
D . 802.3af

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Answer: A