A network administrator receives a ticket stating half of the second-floor end users cannot connect to the company’s accounting servers, while other end users have no connectivity issues. All second-floor users connect to the same switch and router. While troubleshooting, the administrator receives the following error: No route to host. Which of the following could be the cause of this type of behavior?
A. Misconfigured DHCP
B. Misconfigured firewall
C. Misconfigured VLAN assignment
D. Misconfigured DNS