A physical network diagram describes the hardware connectivity. In addition, as shown in the following physical diagram, such network diagrams do not depict traffic flow. The physical firewalls support multiple contexts, and the switching infrastructure supports multiple VRFs. Since the network traffic is directed via virtual LAN (VLAN) tagging, the physical diagram below is important to understand Data Center and Office Automation. It should be noted here that data center automation is the process by which routine workflows and processes of a data center—scheduling, monitoring, maintenance, application delivery, and so on—are managed and executed without human administration. Datacenter automation increases agility and operational efficiency.