Go back to 642-552 - SND - Securing Cisco Network Devices Exam

Question :-

What are two ways of preventing VLAN hopping attacks? (Choose two.)
Disable DTP on all the trunk ports.
Enable VTP pruning on all trunk ports to limit the VLAN broadcast.
Set the native VLAN on all the trunk ports to an unused VLAN.
Using port security, set the maximum number of secure MAC addresses to 1 on all trunk and access ports.
Disable portfast on all access ports.

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