Is is possible to make a passive network tap using only three jacks, with only one jack and one NIC used for the tap itself? I am accustomed to making these with 4 jacks, with 2 being used for the tap. With 4 jacks, each of the taps gets a half duplex signal in a full duplex config. This forces you to bridge your two NICS if you want to sniff both directions of traffic. I am just wondering if there is a more efficient tap.