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You have a router, R1. On it you have a trunk. The config looks like this:

interface GigabitEthernet0/1 switchport trunk encapsulation dot1q switchport trunk native vlan 999 switchport mode trunk media-type rj45 negotiation auto

You then get a new directive from management. There are 4 new vlan's to be added in the network, vlan 67, 68, 69 and 70. These are to be allowed to pass through the trunk, how would you change the config?

R1(config-if)#Switchport trunk allowed vlan add 67-70

R1(config-vlan)# Allow vlan 67-70

R1(config-if)#Switchport trunk allowed vlan 67-70

None of the alternatives



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