There are two ways to connect a Rednet system to your computer: the Rednet PCIe card, or using Dante Virtual Soundcard (DVS).
Rednet PCIe Card
Connecting Rednet to a computer via the Rednet PCIe card allows for up to 128 inputs and 128 outputs (up to 96kHz, 64 x 64 at 192kHz), with a latency of less than 3ms at all sample rates (assuming a DAW buffer setting of 32 samples or less). The Ethernet port on the card is used to send and receive all audio data, and the standard Ethernet port on the computer is used for control data.
Dante Virtual Soundcard (DVS)
For customers who do not require ultra-low-latency performance, Audinate's Dante Virtual Soundcard (DVS) can be used with a single connection to the computer's Ethernet port, and without the need to install a RedNet PCIe card. However, DVS only works at 48kHz (with a maximum of 64 inputs x 64 outputs) and 96kHz (with a maximum of 32 inputs x 32 outputs). The overall system latency varies depending on the host computer and DAW software in use, but in most cases will be similar to the latency experienced using a FireWire interface, and will be higher than the latency incurred when using the PCIe card.