2.3 TCP/IP Networking Model

What functions are performed by Application layer protocols?

Corresponds to the session, presentation, and application layers of the OSI model.

What are MAC addresses? How are they used by the Link layer?

Hosts are uniquely identified at the link layer using a media access control address. "Mac"

How does TCP negotiate a connection with a remote host?

It uses a three-way handshake.

What is the purpose of a network model?

Its is a hypothetical chart that is used to represent the flow of data.

What role do port assignments play in application-to-application communications?

Ports allow a network host with a single IP address to provide multiple services, each sending and receiving data on its own port.

What functions are provided by the Internet layer?

The internet layer is responsible for forwarding packets multiple networks. This is called "routing".

How does the TCP protocol differ from the UDP protocol?

UDP is unreliable form of transporting data with a low overhead. TCP is reliable and has a high over head.