SY0-301 Question #509: Real Exam Question with Answer & Explanation

The correct answer is C: Configure port security.. Port security is a switch-level feature that restricts which MAC addresses are allowed to communicate through a given physical switch port. By enabling port security on unused wall jacks (or disabling those ports entirely), administrators prevent unauthorized devices from connect

Question

At an organization, unauthorized users have been accessing network resources via unused network wall jacks. Which of the following would be used to stop unauthorized access?

Options

AConfigure an access list.
BConfigure spanning tree protocol.
CConfigure port security.
DConfigure loop protection.

Explanation

Port security is a switch-level feature that restricts which MAC addresses are allowed to communicate through a given physical switch port. By enabling port security on unused wall jacks (or disabling those ports entirely), administrators prevent unauthorized devices from connecting to the network just by plugging into an available jack. An access list (A) filters traffic by IP/port but does not prevent physical layer access. Spanning Tree Protocol (B) prevents network loops. Loop protection (D) is also a loop-prevention mechanism - neither addresses physical port access control.

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