Points before Studying Computer Networks
In this video, we discuss an overview of computer networks.
The reader can go with our complete guide on how to study computer science. Click Here.
The points discussed in this post are important before starting computer networks.
Points discussed:
1) Level of understanding after completing computer networks.
2) When to start studying computer networks.
With an example, we will discuss the level of understanding we get after completing computer networks.
The below diagram shows a visualization of the complete subject.
The above diagram desktop is connected to the internet service provider.
The router device at the internet service provider is connected to different systems in your area.
The systems connected in your area form a network.
On the desktop, we opened a WhatsApp application. And we sent the message hi, hello, how, and r u.
The message should convert to one’s and zero and send to the system connected near the internet service provider.
Our first session data link layer understands the communication between the two systems.
There are three important sessions in computer networks.
1) Data link layer
2) Network layer
3) Transport layer
Different network varieties are discussed in the data link layer.
How communication happens between two systems in a network is discussed.
2nd Session:
The second Session deals with the network layer.
We identify The destination desktop in the network layer.
The network layer identifies the shortest route to the destination.
The above diagram shows different ways to reach the destination.
The network layer identifies the shortest path.
Third Session:
Once the messages reached their destination. The destination has to acknowledge.
Suppose four messages are sent, and only three messages are received.
The sender should acknowledge the lost message. The sender will resend the message.
This end-to-end connection is discussed in the transport layer.
The above example is the understanding readers will experience after completing computer networks. Click Here to study.
When to start studying Computer Networks?
The below diagram shows the step-by-step guide to studying computer science.
First, C Programming subject.
Later we move to data structures for coding knowledge.
We study Digital Logic Design and Computer organization and architecture for hardware understanding.
After completing COA, we study the operating system.
After operating the system, one can start studying computer networks.
One can study complete computer science subjects from basics to advance at learning monkey.