TCP vs UDP: When to Use What, and How TCP Relates to HTTP
Before moving to understand the TCP and UDP Let’s understand why we need this actually?
The Internet Needs Rules -
The Internet is not a magic or something where we send it goes like we see in the Ramayan or film. when the data is tranfer over the internet -
It travels through medium or path
it might follow different-different path
it may arrive late
it break data into small chunk
so to manage the whole ecosystem we need some rules or protocol (fancey-name) that every data or ecosystem that follow to transfer over internet.
In the OSI model at the transport layer two majorly protocol widle used that is TCP and UDP
What Are TCP and UDP?
TCP - Transmission Control Protocol
Connection oriented
Relible
follow Ordered
re-transmission
safe and Sequre
UDP - User Datagram Protocol
Connection less
fast
light-weight
Un-relible
may Data loss
When to Use TCP & UDP?
TCP -
Data is must not loss
Accuracy is critical
ordered of data packet matter
data relible is important
Example -
Payment Transection
Chat Application
login system
sending Email
opening websites
database communication
UDP -
Speed is matter over perfection
small loss is acceptable
Real-time communication is important
Example -
Video calls
Live Video streaming
online Gaming
Live Brodcast
What Is HTTP and Where It Fits?
HTTP stand for Hyper text transfer protocol. and it is application layer protocol not transport layer in OSI model.
HTTP protocol defines the follwing thing actually -
How request looks when we send
How response looks when recieved
Different Methode for sending request (GET, POST, PATCH, PUT, DELETE)
Information about the status code
Details about the Header
Relationship Between TCP and HTTP -
Actuallly HTTP run on the Top of the TCP because what happen when we type hashnode.com.
Browser create a standerd http request
HTTP request is send over TCP protocol
TCP will take care about the data transmission.
Server send the response
TCP will responsible for the safe delivery at client
