Released in 2015, Hypertext Transfer Protocol version 2 (HTTP/2 or H2) is the first significant upgrade over HTTP.
HTTP/2 is capable of loading multiple page elements in parallel over single TCP connection. It reduces the latency to serve requested content faster by doing the following.
There is no concrete answer as it depends on client network speed, browser and many other factors. AKAMAI and Coudflare has demo site where you can experience latency and how fast it loads over HTTP/2 vs HTTP1.1
HTTP/2 Implementation is quite straightforward and this can be configured in web servers, network devices, CDN.
HYou may refer this guide to configure in Apache HTTP, Nginx and LiteSpeed. Most of the CDN provider like Cloudflare, SUCURI, Incapsula, KeyCDN has started supporting HTTP/2 so if you are using them then you can enable HTTP/2 with just one click.
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Check the supported protocol, server preferences, certificate details, common vulnerabilities and more
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Find out the hosting provider of any site, quickly
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HTTP Headers Checker
Test the headers are being advertised by your web server or network edge device
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