Refer to the exhibit and the partial configuration taken on routers RTA and RTB. All users can ping their gateways, but users on VLAN 5 and VLAN 10 cannot communicate with the users on VLAN 20. What should be done to solve the problem?
- RTA interface Fa0/1 and RTB Fa0/1 should be configured with three subinterfaces, each with 802.1Q encapsulation.
- RTA interface Fa0/1 and RTB Fa0/1 should be configured with three subinterfaces, each with ISL encapsulation.
- A dynamic routing protocol or static routes should be configured on the routers.
- A trunk should be configured between routers RTA and RTB.
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