Well, once we have our entire virtual environment already migrated to the new version of VMWare vSphere 4.0, all servers running under VMware ESX 4.0 and our VMware vCenter Server as well, We will be able to enjoy its advantages, One of them is the new switch environment, called Distributed Switches or vNetwork Distributed Switches. With this we will achieve comfort when managing network environments, Much simpler, Change the way switches are configured, No more configuring a switch or virtual network for each host, otherwise, is a global environment, everything is done at the vCenter Server level and will apply to all of our hosts.