In a Cisco switch, what is the default period of time after which a MAC address ages out and is discarded?

In a Cisco switch, what is the default period of time after which a MAC address ages out and is discarded?
A . 100 seconds
B . 180 seconds
C . 300 seconds
D . 600 seconds

View Answer

Answer: C

Explanation:

To configure the aging time for all MAC addresses, perform this task: Command Purpose Step 1 switch# configure ter- Enters configuration mode. minal Step 2 switch(config)# mac-ad- Specifies the time before an entry ages out and is dis- dress-table aging-time carded from the MAC address table. The range is from seconds [vlan vlan_id] 0 to 1000000; the default is 300 seconds. Entering the value 0 disables the MAC aging. If a VLAN is not specified, the aging specification applies to all VLANs.

Reference: http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/M ACAddress.html