a function that copies packets sent or received on a specific port to another port. A monitoring device such as Sniffer or Rmon probe can be attached to a port to analyze the details of the packets that pass through the source port
A system that allows you to copy the traffic from one port on a Switch to another port on the Switch. Port mirroring is used when you want to monitor the physical characteristics of a LAN segment without changing the characteristics by attaching a monitoring device.
Port mirroring allows you to copy traffic from one port to another port in order to examine the first port's raffic without interfering with it.