OSI Model

Question 1

OSI stands for what?

Answer 1

Open Systems Interconnection Model

Question 2

What is the role of OSI?

Answer 2

It provides a framework dictating how all networked devices will send,receive and interpret data.

Question 3

What happens in layer APPLICATION

Answer 3

It is the layer in which protocols and rules are in place to determin how the user should interact with data sent or received.

Question 4

Presentation layer

Answer 4

It acts as a translator for data to and from the 7 layer
Security features such as data encryption occur at this layer.

Question 5

Session Layer

Answer 5

If the data is translated correctly. This layer will create a connection.
Whilst this connection is active, it is called the session.
It synchronizes then the two computers to ensure they are in the same page.
It divide data to packets and send It.
Sessions are unique; data can not travel over different session.

Question 6

What are the characteristics of TCP?

Answer 6

reliability and guarantee

Question 7

How the reliability and guarantee are done in TCP?

Answer 7

Reliability: If one small chunk of data is not received, then the entire chunk of data cannot be used.
Guarantee: Error checking

Question 8

Give me examples in which we can use TCP.

Answer 8

file sharing, internet browsing or sending an email.
In general: the services which require the data to be accurate and complete

Question 9

What are the characteristics of UDP

Answer 9

any data that gets sent via UDP is sent to the computer whether it gets there or not.