The Network layer
The Network layer handles connectivity of the Cisco Nexus Switch to the network, and includes packet traffic transmitted to and from the server. Using the tests available in this layer, administrators can determine whether the network link to the target Cisco Nexus Switch is available or not, the bandwidth availability, and the rate of packet transmissions to and from the host. In addition, the administrators can also determine the operational state of the network interfaces and the reason for why the interface is down.
Figure 1 : The list of tests associated with the Network layer