$1.$ A$.$ Out of the four connection models which one is the most appropriate for an emergency video

conferencing between the leaders of the two of world most powerful countries. You must

justify your answer.

B$.$ Is it possible to directly connecting two peer applications running on two hosts across the

network layer, without the data link and physical layers? You must justify your answer.

C$.$ What are the two pieces of information that uniquely identify an application. Describe the

pieces of information.

D$.$ What is the name of the protocol that automatically assign an IP address to a computer?

E$.$ In NAT, which piece of information the home router uses to uniquely identify the home

computers?

F$.$ Name the five layers of the Internet model.

G$.$ Name the three "things" that a network protocol defines.

H$.$ Name the four components of nodal delay.

I. Name the three capabilities of the sender and receiver must have for reliable data transfer.

J$.$ What is the size of the MAC address?