What is the effect of issuing a switchport trunk allowed vlan 30 command on Fa0/5?

ccna2-answer
ccna2-exam
dynamic-routing

#1

A Cisco switch currently allows traffic tagged with VLANs 10 and 20 across trunk port Fa0/5. What is the effect of issuing a switchport trunk allowed vlan 30 command on Fa0/5?

  1. It allows VLANs 1 to 30 on Fa0/5.
  2. It allows VLANs 10, 20, and 30 on Fa0/5.
  3. It allows only VLAN 30 on Fa0/5.*
  4. It allows a native VLAN of 30 to be implemented on Fa0/5.