Day 41 – Source IP and Destination IP


The Protocol field in the IPv4 header contains a number indicating the type of data found in the payload portion of the datagram. (What kind of data is present?)


Data part that needs to be transmitted/Transport layer

Datagram is presented with protocol using a number. UDP or TCP. UDP is presented by 17, and TCP presented by 7.

ICMP – Internet Control Message Protocol

8 bit (0-255)

Source IP (32-bits)

The computer transmitting data is the source.

Destination IP Address (32-bits)

The computer receiving the data is the destination.

The IP Addresses of the Source and Destination will get accommodated in these two fields.

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