Which technique connects a network analyzer to a device by creating a GRE tunnel for traffic monitoring?

Which technique connects a network analyzer to a device by creating a GRE tunnel for traffic monitoring?

• A. Remote Traffic Mirroring
• B. SPAN or Mirrored Port
• C. Local Traffic Mirroring
• D. Traffic Mirroring

Answer: (A)

Remote traffic mirroring focuses on sending a copy of the traffic to a monitoring device that’s not locally attached, often by encapsulating the mirrored packets in a tunnel such as GRE. That GRE tunnel lets the analyzer receive the traffic across the network to the remote location without disrupting the original flow. This is why it’s the best fit when the goal is to connect a network analyzer to a device via a GRE tunnel for traffic monitoring.

SPAN or Mirrored Port mirrors traffic to a local monitoring port on the same device, so it doesn’t involve tunneling to a remote analyzer. Local Traffic Mirroring is similar but occurs on the local device. Traffic Mirroring is a broad term that doesn’t specify remote transport or GRE-based delivery.