What is the default MAC age-out timer on an EX Series switch?
What is the default MAC age-out timer on an EX Series switch?
The default MAC aging time on Juniper EX Series switches is 300 seconds. This means a MAC address will remain in the MAC address table for 300 seconds before it is removed if there are no active communications associated with that address.
The default MAC aging time on Juniper EX Series switches is typically 300 seconds, or 5 minutes. This timer controls how long a MAC address remains in the MAC address table before it's removed if there are no active communications associated with that address.
D is correct
By default, the timeout interval for all entries in the MAC table is 300 seconds. https://www.juniper.net/documentation/us/en/software/junos/bridging-learning/topics/task/layer-2-services-address-learning-and-forwarding-configuring-table-timeout-interval.html