Virtio and network (1/3)

user-mode networking by default
bridged setup for performance
-net tap,ifname=...
paravirtualized networking
http://blogs.gnome.org/markmc/2008/05/28/checksums-scatter-gather-io-and-segmentation-offload/
-net nic,model=virtio,vlan=0,macaddr=00:16:3e:00:01:01