While talking about Web hosting, WordPress and other things, first you need to know about the term ‘HTTP’. And what is that, what is the difference between its versions, speed, benefits and its usage. Well. Simple explanation is that (HTTP) Hypertext Transfer Protocol is an application protocol that is at present, is the base of data communication for the World Wide Web. Furthermore, it is Client/Server model. Further simplifying the term, it means the service receiver and service provider and the relation or process happened through requests and responses. Buckle up, coz we are going to discuss “What is HTTP/2?” Its benefits and usage.
Basically, this version was released in 2015 by Internet Engineering Task Force (IETF) and it is based on Google’s SPDY Protocol, which originally build and design to speed up the web pages. Other than this, do not confuse yourself that this version replaces the HTTP. It is an extension, with all the core concepts such as HTTP methods, Status Codes, URIs, and Header Fields remaining the same.
What is HTTP/2?
On the other hand, it was designed for different purposes and set some goals.
- The first goal was the Protocol negotiation mechanism and to set to have high compatibility with the earlier versions.
- The 2nd biggest and foremost purpose of this protocol was to ensure that, the web pages should open and load much quicker. So with this version of hypertext protocol is to boost the web pages speed.
Other than this, earlier, many browsers supported this standardization effort, like Chrome, Opera, Internet Explorer, and Safari. Due in part to this browser support, there has been a significant adoption rate of the protocol since 2015, with especially high rates among new sites. Besides that on the technical terms, the biggest difference between version 1.1 and 2.0 is the “binary protocol’. The binary framing layer is the part of the application layer in the internet protocol stack. The HTTP 2 keeps all requests and responses in plain text format; uses the framing layer to encapsulate all messages in binary format.
Other features are:
- HTTP/2 Server Push
- Compression of Request Headers
- Request pipelining
- HOL blocking (Head-of-line) Package blocking set
- Request multiplexing over a single TCP Connection
- Enables other capabilities of the HTTP/2 including compression, multiplexing, prioritization, flow control and effective handling of TLS.
- Compact representation of commands for easier processing and implementation.
- Efficient and robust in terms of processing of data between client and server.
- Reduced network latency and improved throughput
This version of HTTP can perform multi-tasks; it can send multiple requests for data in parallel over a single TCP connection. Not only that, it allows users to download web files asynchronously from one server. Most modern browsers limit TCP connections to one server. This also reduces time, so it makes the website to load faster by reducing the additional round trip time. And user doesn’t need any kind of optimization.
HTTP/2 Server Push
This service provides the server to send further cacheable information, which client has not requested. For instance, if the client requests for the resource X and it is understood that the resource Y is referenced with the requested file, the server can choose to push Y along with X instead of waiting for an appropriate client request.