Question

Host A (192.168.1.10) wants to send a packet to Host B (192.168.1.20) on the same LAN, but does not know B's MAC address. What is the very first step in the ARP resolution process?

A Host A sends a unicast DNS query to resolve B's MAC address
B Host A sends an ICMP Echo Request directly to Host B
C Host A broadcasts an ARP Request frame to the LAN, asking “Who has 192.168.1.20?”
D Host A forwards the packet directly to the default gateway for MAC resolution
E Host A sends a DHCP request to obtain Host B's MAC address
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