What is the default port-security behavior on a trunk link?

The correct answer is C. It places the port in the err-disabled state if it learns more than one MAC address.. When you enable port security on a switch, by default only one MAC address can be learned. To allow more than one MAC address on a switch port simultaneously, use the command:port- security maximum <max-number>.

Submitted by chiamaka_o· Mar 5, 2026

Question

Options

AIt causes a network loop when a violation occurs.
BIt disables the native VLAN configuration as soon as port security is enabled.
CIt places the port in the err-disabled state if it learns more than one MAC address.
DIt places the port in the err-disabled slate after 10 MAC addresses are statically configured.

How the community answered

(32 responses)

A
3% (1)
C
94% (30)
D
3% (1)

Explanation

When you enable port security on a switch, by default only one MAC address can be learned. To allow more than one MAC address on a switch port simultaneously, use the command:port- security maximum <max-number>.

Topics

#port-security#trunk link#err-disabled state

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