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HTTP 1.1 vs HTTP 2

HTTP 1.1 vs HTTP 2

Introduction:

HTTP (Hypertext Transfer Protocol) is the underlying protocol that powers the World Wide Web. It is a request-response protocol that enables communication between clients and servers. Over the years, HTTP has evolved and seen several versions. The two most widely used versions of HTTP are HTTP1.1 and HTTP2. In this blog, we will explore the differences between HTTP1.1 and HTTP2.

Multiplexing:

One of the significant differences between HTTP1.1 and HTTP2 is that HTTP2 supports multiplexing, while HTTP1.1 doesn't. Multiplexing allows multiple requests and responses to be sent and received concurrently over a single connection. This feature significantly improves the performance of web applications, especially in scenarios where multiple requests are made to the same server. In contrast, HTTP1.1 requires multiple connections for parallelism, which can be inefficient and lead to increased latency.

Binary protocol:

HTTP1.1 uses a text-based protocol, which is human-readable but not as efficient as a binary protocol. In contrast, HTTP2 uses a binary protocol that compresses headers and payloads, reducing the overall size of the data transmitted between the client and the server. The binary format of HTTP2 also allows for more efficient parsing, resulting in faster processing of requests and responses.

Header Compression:

HTTP1.1 doesn't support header compression, resulting in redundant data being transmitted between the client and the server. HTTP2 addresses this issue by using the HPACK compression algorithm to compress headers, reducing the size of the data transmitted over the network. This feature significantly improves the performance of web applications, especially in scenarios where multiple requests are made to the same server.

Server push:

HTTP2 introduces the concept of server push, which allows the server to send additional resources to the client without the client requesting them explicitly. This feature eliminates the need for the client to make multiple requests to the server for resources required to render a page, resulting in faster page load times.

Connection Management:

HTTP1.1 requires the client to open and close connections for each request and response, resulting in increased latency and overhead. In contrast, HTTP2 uses a single connection to the server, reducing the overhead associated with establishing and maintaining multiple connections. This feature significantly improves the performance of web applications, especially in scenarios where multiple requests are made to the same server.

Conclusion:

In conclusion, HTTP2 is a significant improvement over HTTP1.1, addressing many of the performance issues and limitations of the previous version. The introduction of multiplexing, binary protocol, header compression, server push, and connection management make HTTP2 more efficient, faster, and more reliable than HTTP1.1. Therefore, it is recommended to use HTTP2 for developing high-performance web applications.

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Location: Bengaluru, Karnataka, India

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