CCNA: Cisco Certified Network Associate — Question 234

On a corporate network, hosts on the same VLAN can communicate with each other, but they are unable to communicate with hosts on different VLANs. What is needed to allow communication between the VLANs?

Answer options

• A. a router with subinterfaces configured on the physical interface that is connected to the switch
• B. a router with an IP address on the physical interface connected to the switch
• C. a switch with an access link that is configured between the switches
• D. a switch with a trunk link that is configured between the switches

Correct answer: A

Explanation

The correct answer is A because a router with subinterfaces allows routing between different VLANs by creating separate virtual interfaces for each VLAN. Option B is incorrect as it does not facilitate inter-VLAN routing without subinterfaces. Options C and D are also incorrect since they pertain to switch configurations and do not provide the necessary routing capability between VLANs.