task1.txt

Write a blog on Difference between HTTP1.1 vs HTTP2?

HTTP stands for HyperText Transfer Protocol
Introduction:-
       Developed by Timothy Berners-Lee in 1989 as a communication standard for the World Wide Web.
HTTP/1.1 which was created in 1997 and HTTP/2 was created in 2015 with most Development.
it is used in client-server communication user sends 
request to the server & the server sends the response to the user HTTP has a various version and 
Development.

Reason for HTTP2:
  i.) HTTP/2 was developed over the SPDY protocol.(pronounced "speedy") 
    is an obsolete open-specification communication protocol developed for transporting web content

  ii.)HTTP/2 aims at simplifying, speeding up, and empowering the applications across the internet
       To Achieve the same.the protocol emphasizes on page load time, resource optimization, 
       and round-trip time (RTT) reduction.

                    Difference Between HTTP1.1 and HTTP2:-

HTTP1.1:-
1. HTTP1.1 server using the method (GET/POST) and sends messages as plain text.

2. There is a phenomenon that blocks all the requests behind it until it doesn’t get its all resources.
   this connection will remain open,This phenomenon is called head-of-line blocking (HOL blocking)

3. It uses requests resource Inlining for use getting multiple pages

4. HTTP/1.1 uses formats like gzip to compress the data transferred in the messages
   it gets larger due to the use of cookies or an increased number of requests.

5. The flow control mechanism in HTTP/1.1 relies on the basic TCP connection,both the machines set their buffer sizes automatically.
   If the receiver’s buffer is full, it shares the receive window details, telling how much available space is left

HTTP2:-
1. It works on the binary protocol.Binary protocols are intended to be read by a machine rather than a human being.
   a binary protocol utilizes all values of a byte

2. It allows multiplexing so one TCP connection is required for multiple requests.

3. It uses PUSH frame by server that collects all multiple pages 
    PUSH => If the server can predict what requests a client might want to make, 
      the server can preemptively send request/response pairs to the client and warm its cache

4. It uses HPACK for data compression.
    HPACK=>  a compression format for efficiently representing HTTP header fields.

5. It multiplexes data streams utilizing the same (one) TCP connection.
   So, in this case, both machines can implement their flow controls instead of using the transport layer
   The application layer shares the available buffer size data,the flow control mechanism does not need to wait for the signal
   to reach its destination before modifying the receive window