You are the administrator for a network with two Windows Server systems and 65 Windows Vista systems. At 10 a.m., three users call to report that they are experiencing network connectivity problems. Upon investigation, you determine that the DHCP server has failed. How can you tell that the DHCP server failure is the cause of the connectivity problems experienced by the three users?
A. When you check their systems, they have an IP address of 0.0.0.0.
B. When you check their systems, they have an IP address in the 192.168.x.x address range.
C. When you check their systems, they have a default gateway value of 255.255.255.255.
D. When you check their systems, they have an IP address from the 169.254.x.x range.