Switched networks present an inherent initial challenge to sniffing a network in its entirety. A wired switch doesn’t allow you to sniff the whole network. As you saw in Chapter 2, each switchport is a collision domain, so traffic within the switch doesn’t travel between ports. Okay, enough switch talk. Your goal is to be able to sniff the network portions you want to at will. To achieve this you can use the various techniques that we’ll explore in this section.