JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing (2021) — Question 3

Because of recent network failures, additional circuits have been purchased. In addition, Fast reroute has been configured on critical MPLS LSPs.
When the next failure occurs, which two time intervals will affect fast reroute? (Choose two.)

Answer options

• A. The amount of time required to reroute the traffic onto the detour
• B. The amount of time to detect a link or node failure
• C. The amount of time required to recalculate the best detour
• D. The amount of time it takes to ping the gateway on the detour link

Correct answer: A, B

Explanation

The correct answers, A and B, pertain to the processes that directly impact the efficiency of fast reroute. A explains the rerouting time, while B deals with failure detection time. Options C and D are not relevant because recalculating the detour and pinging the gateway do not directly affect fast reroute's immediate response to failures.