TCP/IP protocols

Question 1

What are the four layers of the TCP/IP protocol stack?

Answer 1

The four application layers are:
Application layer
Transport layers
Internet Layer
Link Layer

(A Train Is Late)

Question 2

What does the Application Layer do?

Answer 2

Uses high-level protocols to set an agreed standard between communication end-points. E.g. what protocols to use.
Does not determine how the data is transferred but the specific rules on how the data should be sent.

Question 3

What does the Transport Layer do?

Answer 3

Uses Transmission Control Protocol to establish end-to-end connection with the recipient’s computer.
Splits them into packets and numbers them.

Question 4

What does the Internet Layer do?

Answer 4

Uses the Internet Protocol(IP) to address packets with the source and destination IP addresses.

Question 5

What does the Link Layer do?

Answer 5

The link layer operates across a physical connection
Adds the MAC address of the physical nic of the destination and source.
MAC addresses change with each hop.