What is most likely the cause of this issue?

What is most likely the cause of this issue?
A . There is a firewall rule blocking VLAN512 traffic
B. VLAN512 is a reserved VLAN ID, and not usable for guest VMs.
C. The VLAN was not created on the upstream switches.
D. The administrator did not created the VLAN on all hosts

View Answer

Answer: C