A network tap comprises a set of optical signal regeneration circuits and a failover circuit. The set of optical signal regeneration circuits is configured to convert an input optical signal from one network device to an electromagnetic signal and generate output optical signals for another network device and for a monitoring device from the electromagnetic signal. The failover circuit is configured to provide the input optical signal to the set of optical signal generation circuits in a normal mode and provide the input optical signal to the other network device in a failure mode.