Difference between HTTP 1.0 and HTTP 1.1

Difference between HTTP 1.0 and HTTP 1.1

If you are a common internet user, then it is obvious that you have come across these two terms, HTTP and HTTPS. They also fall under the most viewed terms owing to the fact that billions of websites are active. HyperText Transfer Protocol, also known as HTTP, functions by serving as the client-side and also as a server protocol, by defining how messages are structured and sent across the internet.

HTTP 1.0 Vs. HTTP 1.1

The outstanding feature between HTTP 1.1 and HTTP 1.1 is that HTTP 1.0 status codes are used in signifying successful requests and identifying transmission problems. HTTP 1.1, on the other hand, aids chunk transfers that make it possible for materials to be easily streamed in chunks and deliver extra headers after a message body.

HTTP 1.0 came to be in 1996 and was successfully acknowledged, something that has made it gain popularity up to date. However, HTTP 1.0 only features a rudimentary authentication “challenge-response control”. The main problem with this is that passwords and usernames are not properly encrypted. This leaves them susceptible to insecurities, including spying. HTTP 1.0 also comes with a 16 code status.

HTTP 1.1 on the same offers persistent connections meaning it can send lots of responses and requests. It features a new OPTION method. The technique can easily be used applied by HTTP users in discovering the capabilities and functions of an HTTP server. It is mainly used in web applications for proper cross-origin resource sharing.

What is HTTP 1.0?

HTTPv1.0 only provides rudimentary authentication “challenge-response control”. Nevertheless, the main problem with such a technique is the fact that the password and username are not perfectly secured by encryption. This leaves the password and username susceptible to both spyings and with no time constraints. Any details acquired through spying can still be used even after being obtained. The user will therefore need to calculate the checksum of the username, password, one-time value, which includes HTTP request types as well as the requested URI for valid responses.

Since HTTP 1.0 was specifically created to utilize a new connection of TCP for every request, every appeal had to make payments at the expense of establishing new TCP connections. However, since internet transactions are usually brief and go beyond the slow start stages, they don’t apply the available bandwidths. However, some of the versions of 1.0 implementation tried utilizing “Keep-alive” headers demanding that the links be kept alive, an approach that never did well, especially with in-between proxies.

However, the server must continue providing replies in a similar sequence to the matching request for any given connection. Users are not supposed to wait for a previous request-response before they can submit another within the same connection. HTTP 1.0 also reduces the network round trip latency and, at the same time, optimizes TCP protocol capabilities.

What is HTTP 1.1?

HTTP 1.1 solves problems that arise with HTTP1.0 by introducing permanent pipelining and connections. It works through the implication that each TCP connection has to remain active unless there is a request to disconnect, especially when using a persistent connection. It also allows clients to submit different appeals within a similar connection without necessarily having to wait for each answer, which significantly increases HTTP 1.1’s performance compared to HTTP 1.0.

Nevertheless, HTTP 1.1 approach has an inherent setback. This is because several data packets cannot come across each other. At times, this can lead to a request within the queue failing to acquire the appropriate resources as required, causing blockage to all requests behind it.

This is commonly referred to as HOL “head of the line” blocking, which is also a major issue, especially for HTTP 1.1 connection performance improvements. Such an issue can be solved by separate, parallel TCP connections. But the concurrent TCP connection number between clients and servers will be limited, and every new connection will therefore consume lots of resources.

The flow control within HTTP 1.1 is TCP-based. Once the TCP is established, both the client and server will use their default system setting to determine the buffer size. Once the receiver’s buffer becomes partially full, it informs the sender of a receiver’s receive window as well as notifies the user of the free space available in the buffer.

Difference between HTTP 1.0 and HTTP 1.1

  1. HTTP 1.0 is frequently applied in headers, while HTTPS 1.1 is mainly used in introducing sophisticated cache management approaches.
  2. HTTP 1.0 features some bandwidth while HTPP 1.1 features less bandwidth.
  3. HTTP 1.1 supports host header response and also messages, while HTTP 1.0 works by implying that every server has to bind a distinct IP address.
  4. HTTP 1.0 only has one request and answer for every TCP connection, whereby HTTP 1.1 makes it possible to reuse the connection.
  5. HTPP 1.1 utilizes optimizations such as inlining, domain sharding, and concatenating while HTTP 1.0 only supports caching so as to serve the websites quickly.


Since the inception of HTTP or the HYPERTEXT Transfer Protocol in 1989, it has remained the standard approach to data transfer within websites. Nevertheless, HTTP 1.1 has undergone a few modifications ever since its release in 1997, with the latest modification being HTTP 2 released in 2015.

It helped by providing different ways of reducing latency. HTTP 1.1 has increased its popularity, with a rough estimate claiming that it supports almost a third of the websites on the internet. Understanding HTTP 1.1 and HTTP 2 technological distinctions can easily assist web developers in making educated and profound judgments in regards to emerging practices in the ever-shifting world.

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