Sample question 1 — Network Assurance
A network engineer is configuring a dual-homed branch router with two WAN links. The primary link should be used for all traffic unless it fails, in which case traffic should fail over to the secondary link. The engineer needs to detect failures quickly and automatically adjust routing. Which feature should be implemented?
- A. IP SLA with object tracking and static routes
- B. BGP with default originate and local preference
- C. OSPF with cost manipulation on interfaces
- D. EIGRP with variance and unequal cost load balancing
Answer: A. Option A is correct because IP SLA with object tracking can monitor the primary link and trigger route changes based on reachability, enabling quick failover. Option B is incorrect because BGP default originate with local preference does not provide fast failure detection for static failover. Option C is incorrect because OSPF cost manipulation does not automatically detect link failures quickly. Option D is incorrect because EIGRP variance is for load balancing, not for primary/backup failover.
