You attempt to ping a remote device by name from a PC, and the ping operation fails and returns the error message "Ping request could not find host." You verify that the router DHCP pool is configured with a name server. What are two possible reasons for the problem? (Choose two.)
A. The DNS server is not reachable.
B. The PC network interface card device driver is missing.
C. The host that must be resolved does not exist.
D. The subnet mask of the DHCP pool is incorrect.
E. The DHCP server cannot provide an address to the PC.
