Again, you should be able to work though the examples in this chapter with a working pfSense system with at least a WAN and LAN interface with at least one node on the LAN network. It is helpful to have different types of software with which different traffic shaping scenarios can be simulated (for example, VoIP software to simulate cases where low latency is important; peer-to-peer (p2p) software for cases where high levels of latency can be tolerated, but we may want to absorb as much excess bandwidth as possible).