A company is experiencing exponential growth and has hired many new employees. New users are reporting they cannot log into their systems, even though they are on the same network. The technician can see physical connectivity to the network switch along with their MAC addresses. Which of the following should the technician check NEXT? 

Answer options:

A. VLAN routing
B. Server-based firewall configuration issue
C. Patch cable type
D. DHCP scope availability

D