Which of the following statement is incorrect?

A. Gateways are assumed to know correct routes; hosts begin with minimal routing information and learn new routes from gateways.

B. Layered protocols are designed so that layer n at the destination receives exactly the same object sent by layer n at the source.

C. Application programs as well as all protocol software from the Internet layer upward use only IP addresses; the network interface layer handles physical addresses.

D. All of the above

E. None of the above

Answer: Option D