I have read the tutorial How To Install KVM And libvirt On CentOS 6.2 With Bridged Networking and I'm confused. What for do we generally want to set up virtualization with bridged networking? I thought we need bridged networking to provide networking to guest systems, but why do we need it for a host system? This question in not purely theoretical for me: I have ordered a CentOS dedicated server with 4 IP's and I'm going to run 3 web-facing VM's on it. I'm figuring out how should I configure it.