There are better networking models out there [0] and at least some books use them. Including some popular ones like “Top Down Approach” by Kurose and Ross. 0:

There are better networking models out there [0] and at least some books use them. Including some popular ones like “Top Down Approach” by Kurose and Ross. 0: https://en.wikipedia.org/wiki/Internet_protocol_suite#Layer_names_and_number_of_layers_in_the_literature https://en.wikipedia.org/wiki/Internet_protocol_suite#Layer_...