The Portable Aggregator TAP copies 100% full duplex traffic between two (2) network devices on 10/100/1000M Copper networks and then aggregates the copies to one or multiple out-of-band monitoring tools. The Aggregator TAP offers network engineers excellent flexibility by supporting aggregation, breakout, and regeneration/SPAN modes. The TAP is unmanaged and simple to configure the modes with DIP Switches on the back of the TAP. Most importantly, it is impossible for data to flow from the out-of-band monitoring tools to the network via the monitoring ports in the TAP because of its hardware-based Data Diode design. In the event that power to the TAP is lost, the relay circuitry will fail closed providing a connection between network devices. This built-in failsafe feature allows traffic to continuously flow if the TAP loses power. The TAP is invisible to hackers because there is no IP or MAC address.