Refer to the exhibit. In an analysis of the existing customer network shown, you notice that when issuing the show arp command there is no MAC address associated with the workstation. Which of the following could be the reason?
A.
R4 Ethernet0 interface is running SNAP encapsulation.
B.
The workstation NIC card is not running the same encapsulation as R4.
C.
R4 needs to perform a RARP request to retrieve the MAC address of the workstation.
D.
The workstation would not return a MAC address because it is not running a routing protocol.
E.
R4 needs to have a static route configured for the workstation in order for the ARP process to return a MAC address.