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The IPv4 protocol field allows the endpoint to determine what type of data is in the packet. The endpoint's IP layer uses the protocol field to determine which protocol to hand the packet off to.

The protocol field allows the endpoint to determine what type of data is in the packet. The endpoint's IP layer uses the protocol field to determine which protocol to hand the packet off to.

The IPv4 protocol field allows the endpoint to determine what type of data is in the packet. The endpoint's IP layer uses the protocol field to determine which protocol to hand the packet off to.

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The protocol field allows the endpoint to determine what type of data is in the packet. The endpoint's IP layer uses the protocol field to determine which protocol to hand the packet off to.