CCNA R&S Exam Prep Question of the Week

June 20, 2014 Johnny Bass Cisco, Cloudera, Featured, Professional Development, Project Management, Routing & Switching, Technology, Training in Business

A router has two Fast Ethernet interfaces and needs to connect to four VLANs in the local network. How can you accomplish this task using the fewest physical interfaces?

A. Add a second router to handle the VLAN traffic.
B. Use a hub to connect the four VLANS with a Fast Ethernet interface on the router.
C. Implement a router-on-a-stick configuration.
D. Add two more Fast Ethernet interfaces.

The correct answer is C.

“Router on a stick” is a term used when trunking is configured on the router. Sub-interfaces are configured and mapped to VLANs to allow for interVLAN routing. In this case, only one physical interface is needed.

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