After an ARP request is made by PC1 to reach PC2, what is the expected response?

The expected response after PC1 sends an ARP request to reach PC2 is that PC2 will send an ARP reply with its MAC address.

When PC1 needs to communicate with PC2 but does not know its MAC address, it broadcasts an ARP request to the local network. This request asks, "Who has this IP address? Please send me your MAC address." Each device on the local network hears this broadcast message, but only the device with the corresponding IP address (in this case, PC2) will respond. PC2 will then send an ARP reply directly back to PC1, including its MAC address. This process allows PC1 to learn the necessary MAC address to frame its messages accurately for PC2, enabling successful communication at the data link layer.

The other options do not align with the dynamic and responsive nature of the ARP protocol, where devices respond to requests with the appropriate information.