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Question 45 Discussion

You need to mirror traffic from a source port on Switch A to a monitoring device on Switch C. For that purpose, you’re configuring Remote Switched Port Analyzer (RSPAN). Due to the nature of RSPAN, what is the best practice when setting it up? (Choose one answer)

  • A. Use the same VLAN already configured for regular data traffic.
  • B. Use a dedicated VLAN assigned only to monitoring devices.
  • C. Use a dynamic VLAN that includes all switch ports.
  • D. Use the RSPAN VLAN as a native VLAN on all trunk ports.
Correct Answer: B

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B 100%

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javaughn Bryan 2025-12-18 00:38:00

Selected Answers: B


B is correct.

RSPAN is an enhanced version of SPAN. Like SPAN, it enables you to mirror traffic on one or more ports to the specified destination interface. However, unlike SPAN, RSPAN tags the mirrored traffic with a VLAN that you choose and then floods the traffic in the VLAN across multiple switches. The result is that all devices in the VLAN receive a copy of the mirrored traffic. For this reason, to prevent network saturation caused by the mirrored traffic, it is a best practice to use a dedicated VLAN for RSPAN, and to assign to the VLAN to the monitoring devices only.

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