1. HTTP 1.1 is the most recent version of the Hypertext Transfer Protocol, the standard protocol for transferring files on the World Wide Web. HTTP 1.1 is an extension of HTTP 1.0, which was the first version of the protocol. HTTP 1.1 adds several new features to the protocol, including persistent connections, pipelining, and chunked transfer encoding. Is HTTP 1. 1 still used? Yes, HTTP 1.1 is still used. It is the most recent version of the HTTP protocol and is supported by all major browsers. Is HTTP 1. 1 the same as https? No, HTTP 1.1 is not the same as HTTPS. HTTPS is a secure communications protocol that runs on top of HTTP. HTTPS adds security by encrypting data that is sent between a web browser and a web server. What is the key difference between HTTP 1. 1 and HTTP 2? The key difference between HTTP 1.1 and HTTP 2 is that HTTP 2 uses multiplexing to allow multiple requests to be sent over a single connection. This results in a significant performance improvement over HTTP 1.1. Is HTTP 1. 1 secure? HTTP 1.1 is a secure protocol that uses TLS encryption to protect data in transit. This makes it difficult for attackers to eavesdrop on communications or tamper with data. Is HTTP 1. 1 bidirectional? Yes, HTTP 1.1 is bidirectional. This means that it can send and receive data at the same time. This is in contrast to HTTP 1.0, which is unidirectional and can only send data.