A network technician has recently discovered rogue devices on their network and wishes to implement a security feature that will prevent this from occurring. Which of the following will prevent…

The correct answer is C. Implement port security on all switches in the network. Port security is a switch-level feature that restricts which MAC addresses are allowed to communicate through a given switch port. You can configure it to allow only a specific MAC address (or a limited number), and to shut down or restrict the port if a violation occurs. This…

Network security

Question

A network technician has recently discovered rogue devices on their network and wishes to implement a security feature that will prevent this from occurring. Which of the following will prevent unauthorized devices from connecting to a network switch?

Options

AImplement 802.11i on all switches in the network.
BImplement port security on all computers in the company.
CImplement port security on all switches in the network.
DImplement rules on the firewall to block unknown devices.

How the community answered

(38 responses)

A
3% (1)
C
95% (36)
D
3% (1)

Explanation

Port security is a switch-level feature that restricts which MAC addresses are allowed to communicate through a given switch port. You can configure it to allow only a specific MAC address (or a limited number), and to shut down or restrict the port if a violation occurs. This directly prevents rogue/unauthorized devices from plugging in. Option A (802.11i) is a wireless security standard - irrelevant for wired switches. Option B is incorrect because port security is configured on switches, not end-user computers. Option D (firewall rules) operates at Layer 3/4 and cannot stop a device from gaining Layer 2 switch access.

Topics

#port security#switch security#network access control#unauthorized devices

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