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JN0-351 · Question #11

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

The correct answer is D. 300 seconds. The default MAC age-out timer on an EX Series switch is 300 seconds. The MAC age-out timer is the maximum time that an entry can remain in the MAC table before it "ages out," or is removed. This configuration can influence efficiency of network resource use by affecting the…

Layer 2 Switching and VLANs

Question

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

Options

  • A30 minutes
  • B30 seconds
  • C300 minutes
  • D300 seconds

How the community answered

(41 responses)
  • A
    2% (1)
  • B
    17% (7)
  • C
    7% (3)
  • D
    73% (30)

Explanation

The default MAC age-out timer on an EX Series switch is 300 seconds. The MAC age-out timer is the maximum time that an entry can remain in the MAC table before it "ages out," or is removed. This configuration can influence efficiency of network resource use by affecting the amount of traffic that is flooded to all interfaces. When traffic is received for MAC addresses no longer in the Ethernet routing table, the router floods the traffic to all interfaces.

Topics

#MAC age-out timer#MAC table#EX Series defaults#bridging

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