100-150: Cisco Certified Support Technician (CCST) NetworkingDemo

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QuestionQ67

Network Access

Review the output of the show mac-address-table command on a Cisco 24-port Ethernet switch.

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What can be determined about this switch from the command output?

  • A Port Fa0/5 is set to administratively down.
  • B All entries were learned by examining incoming frames.
  • C Port Gig0/1 connects to another switch.
  • D There are eleven active ports on this switch.
Explanation

Gig0/1 has dynamically learned MAC addresses in VLANs 1, 2, and 3. Carrying traffic for multiple VLANs indicates a trunk link, which is used to connect switches. Dynamic MAC addresses are learned from source addresses in incoming frames, whereas the Fa0/5 entry is explicitly static.

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