A small company has only one router as the exit point to its ISP. Which solution could be adopted to maintain connectivity if the router itself, or its connection to the ISP, fails?

Question:
A small company has only one router as the exit point to its ISP. Which solution could be adopted to maintain connectivity if the router itself, or its connection to the ISP, fails?

• Activate another router interface that is connected to the ISP, so the traffic can flow through it.
• Have a second router that is connected to another ISP.
• Purchase a second least-cost link from another ISP to connect to this router.
• Add more interfaces to the router that is connected to the internal network.

Explanation: Small networks generally have only one link to an ISP to establish a connection to the Internet. Problems can occur in the network, which can cause the disruption of this service. In order to keep connectivity, redundancy has to be provided. If the problem is in the router interface that is connected to the ISP, another interface can be activated on the router, so if one interface fails, traffic may be redirected toward the other interface. However, if the router itself fails, a second router that is connected to another ISP can be used as a backup.

Exam with this question: 17.8.5 Module Quiz – Build a Small Network Answers