You discover that an employee's PC is not receiving an IP address via DHCP. A change log outlines that the PC has had its OS patches and a new NIC installed (1Gbps), to replace an older slower card (100Mbps). The user is a member of a group that accesses a server hidden behind a firewall. Other group members are not having a problem, and the switchports are up and set for auto-negotiate. What is the MOST likely problem?
A) Incorrect VLAN assignment
B) DHCP server is down
C) Firewall rules blocking the new NIC
D) Incorrect switchport configuration
