CONSIDER THE FIVE LAYER TCP/IP protocol stack where the application layer generates a message of size 800 byres, suppose the next

5. Consider the 5-layer TCP/IP protocol stack where the application layer generates a message of size 800 bytes. Suppose the next two layers add 20 bytes each. Is it necessary that the size of the packet being transmitted at the physical layer will always be at least 840 bytes? Explain. (1+2 points)