JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2025) — Question 30

What is the default MAC age-out timer on an EX Series switch?

Answer options

• A. 30 minutes
• B. 30 seconds
• C. 300 minutes
• D. 300 seconds

Correct answer: D

Explanation

The default MAC age-out timer on an EX Series switch is 300 seconds, which allows for a reasonable time frame for MAC addresses to be retained in the table before being removed. The other options, such as 30 minutes and 300 minutes, are significantly longer and not the standard configuration, while 30 seconds is too short to effectively manage MAC address entries.