1.1.1 - Data Communication

Question 1

Describe the process of encapsulation/decapsulation.

Answer 1

With encapsulation - as data is being pushed to other computers across the network, the “app data” gets encapsulated, layers 2-4 adds their own header and payload. Thus, the “app data” is encapsulated and sent across the network to its target destination.

With decapsulation - once the encapsulated data reaches its intended target/destination, it “decaps” all the other headers, pulling back until it gets to the “app data.” Only leaving the

Question 2

What us a TCP Flag? Describe its function.

Answer 2

A TCP flag is a header that describes/identifies the payload and how the data should be processed via the network. The TCP head containers certain information to be processed within the payload.

Question 3

What is a payload?

Answer 3

A payload is whatever that data is within the header. Example: HTTPS (email) data within layers 5-7.

Question 4

What is the term MTU? Describe it.

Answer 4

Maximum Transmission Unit (MTU). It is used to describe the maximum amount of IP packets to transmit through a threshold.

Question 5

What slows down transmission of data? What happens when you lose a fragment?

Answer 5

Fragmentation. If you were to lose a fragment, the whole packet is lost and requires overhead along the path.