Learn about the default LSA age-out time interval in OSPF for Juniper JN0-351 certification. Discover why 3600 seconds is the correct default value.
Table of Contents
Question
You are asked to change the setting for the LSAs age out back to the default value.
In this scenario, which time interval will accomplish this task?
A. 1800 seconds
B. 600 seconds
C. 300 seconds
D. 3600 seconds
Answer
D. 3600 seconds
Explanation
The default LSA (Link State Advertisement) age-out time in OSPF (Open Shortest Path First) is 3600 seconds, which equals 1 hour.
Each LSA has an age field that indicates how long the LSA has existed in the OSPF database. When an LSA is first originated, its age is set to 0. The age increments as the LSA propagates through the OSPF network.
Once the age reaches 3600 seconds, the LSA is considered invalid and is removed (“aged out”) from the OSPF database, unless it is refreshed by the originating router. This periodic aging prevents old, stale LSAs from persisting and allows OSPF to adapt to topology changes.
While other shorter time intervals like 300, 600, or 1800 seconds are configurable LSA aging values, 3600 seconds (1 hour) is the standard default used by OSPF.
Therefore, to reset the LSA age-out time back to the default value, you would configure it to 3600 seconds, making option D the correct answer for this Juniper JN0-351 certification exam question.
Juniper JN0-351 certification exam assessment practice question and answer (Q&A) dump including multiple choice questions (MCQ) and objective type questions, with detail explanation and reference available free, helpful to pass the Juniper JN0-351 exam and earn Juniper JN0-351 certification.