Suppose that a host sends a packet to a destination IP address and that the CEFbased switch does not yet have a valid MAC address for the destination. How is the ARP entry (MAC address) of the next-hop destination in the FIB obtained?

a. The sending host must send an ARP request for it.
b. The Layer 3 forwarding engine (CEF hardware) must send an ARP request for it.
c. CEF must wait until the Layer 3 engine sends an ARP request for it.
d. All packets to the destination are dropped.


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