100-150 Question 178
Single answerA network administrator is troubleshooting connectivity between two devices on different networks. They discover that packets are not being routed correctly. After reviewing the routing table on the router, the administrator identifies that there is no route to the destination network. What should the administrator do next to resolve this issue?
- A
Add a static route to the destination network in the router's routing table.
- B
Enable DHCP on the router to dynamically discover routes.
- C
Ensure the router has a default gateway configured.
- D
Reboot the router to refresh its routing table.
Show answer and explanation
Correct answer: A
Explanation
When a router lacks a route to a specific destination network, it cannot forward packets correctly to that network. Adding a static route to the routing table is a fundamental method to manually inform the router about the correct path to the destination. This action ensures proper packet delivery and resolves the issue.
- A. Correct.
Adding a static route to the destination network is the correct action when there is no existing route in the routing table. This ensures the router knows how to forward packets to the destination network.
- B. Incorrect.
Enabling DHCP on the router does not help in discovering routes. DHCP is used for assigning IP addresses to devices, not for routing.
- C. Incorrect.
A default gateway is used by end devices, not routers, to send packets to unknown destinations. Configuring a default gateway on the router itself does not resolve missing routes.
- D. Incorrect.
Rebooting the router does not solve the issue of missing routes, as it does not add new routes to the routing table. It may clear temporary issues but won't address the underlying problem.