25. What is HTTP/2 and what are its advantages?

HTTP/2 is an updated version of the HTTP protocol designed to improve the performance and efficiency of data transmission over the web. HTTP/2 introduces several new features compared to HTTP/1.1.

Advantages of HTTP/2:

1. Multiplexing: Allows multiple requests and responses to be sent simultaneously over a single TCP connection, eliminating delays related to connection blocking.
2. Header compression: Reduces the size of transmitted HTTP headers, improving data transmission efficiency.
3. Server push: Enables the server to send resources to the client before they are requested, speeding up page load times.
4. Prioritization: Allows setting priorities for individual data streams, improving the performance of loading important resources.
5. Reduced latency: By sending multiple data streams simultaneously, HTTP/2 reduces latency and speeds up web page loading.