Write a blog on Difference between HTTP1.1 vs HTTP2 :-
HTTP:-
=> HTTP stands for "Hypertext Transfer Protocol".
=> It is used in client-server communication.
=> By using HTTP user sends the request to the server & the server sends the response to the user.
=> HyperText is the type of text that is specially coded with the help of some standard coding language called HyperText Markup Language (HTML).
HTTPS :-
=> Hypertext transfer protocol secure (HTTPS) is the secure version of HTTP,
=> which is the primary protocol used to send data between a web browser and a website.
=> HTTPS is encrypted in order to increase security of data transfer.
=> HTTPS uses an encryption protocol,The protocol is called Transport Layer Security (TLS), although formerly it was known as Secure Sockets Layer (SSL).
=> This protocol secures communications by using what’s known as an asymmetric public key infrastructure.
How does HTTP & HTTPS work?
=> HTTP and HTTPS are used to send data from a browser to a web server. The diagram below shows how they are used.
An Overview Of HTTP :-
=> HTTP is a protocol for fetching resources such as HTML documents.
=> It is the foundation of any data exchange on the Web and it is a client-server protocol, which means requests are initiated by the recipient, usually the Web browser.
=> A complete document is reconstructed from the different sub-documents fetched, for instance, text, layout description, images, videos, scripts, and more.
=> The messages sent by the client, usually a Web browser, are called requests and the messages sent by the server as an answer are called responses.
History of HTTP :-
Tim Berners Lee and his team at CERN get credit for inventing original HTTP and associated technologies.
Difference Between HTTP/1.1 & HTTP/2 :-
HTTP/1.1 :-
=> It works on the textual format
=> It compresses data by itself.
=> It uses requests resource Inlining for use getting multiple pages
=> There is head of line blocking that blocks all the requests behind it until it doesn’t get its all resources.
=> In HTTP/1.1, this was easy, as head-of-line blocking made it simple to load various assets in the correct order.
HTTP/2 :-
=> It works on the binary protocol.
=> It uses HPACK for data compression.
=> It uses PUSH frame by server that collects all multiple pages
=> It allows multiplexing so one TCP connection is required for multiple requests.
=> In HTTP/2, this was solved using priority sends in the request (so need to multiple calls) based on the priority you will receive a response in corresponding order.
Advantages of HTTP :-
=> Memory usage and CPU usage are low because of fewer simultaneous connections.
=> Since there are few TCP connections hence network congestion is less.
=> The error can be reported without closing the connection.
=>HTTP allows HTTP pipe-lining of requests or responses.
Disadvantages of HTTP :-
=> HTTP requires high power to establish communication and transfer data.
=> HTTP is less secure because it does not use any encryption method like HTTPS and use TLS to encrypt regular HTTP requests and response.
=> HTTP is not optimized for cellular phones and it is too gabby.
=>HTTP does not offer a genuine exchange of data because it is less secure.