What is the MOST likely cause of a server NIC not receiving an IP address after installation?

When a server's NIC (Network Interface Card) is not receiving an IP address, a common potential cause is that the patch cable has not been seated properly. Generally, if the cable is not properly connected to either the NIC or the switch/router, the network communication required for obtaining an IP address will be disrupted. Without a valid physical link, the NIC cannot send or receive signals necessary for DHCP (Dynamic Host Configuration Protocol) negotiation, which is the process used to obtain an IP address.

Properly seating the patch cable ensures that both the mechanical and electrical connections are secure, allowing the NIC to effectively communicate with the network and request an IP address. Hence, if the NIC appears to be functioning but is unable to receive an IP address, checking the cable connection and ensuring it is properly seated is a crucial troubleshooting step.