Which three are ways to protect unused switch ports A Enter

Which three are ways to protect unused switch ports?

A. Enter the switchport mode trunk command on each interface.

B. Enter the switchport mode access command on each interface.

C. Place each unused port in a VLAN that does not exist, is inactive, or is connected to limited resources.

D. Place each unused port in a VLAN 1.

E. Disable each unused interface using the shutdown command.

Solution

B, C, and E are correct. They are all ways to secure unused port interfaces.

A and D are incorrect. A is incorrect because creating a trunk with that command would then pass all VLANs, very valuable to an unauthorized user. D is incorrect because VLAN 1 is the default and carries all Layer 2 communications, very valuable to an unauthorized user.