Http/2

background

1. HTTP/2 standard was published as RFC 7540 on May 14, 2015
2. based on SPDY (by google).

important stuff

1. Negotiation mechanism:  for picking http version
2. Compatibilty:  mostly backwards compatible
3. Multiplexing & Concurrency: Several requests can be sent in rapid succession on the same TCP connection, and responses can be received out of order - eliminating the need for multiple connections between the client and the server
4. Server push: The server can send resources the client has not yet requested
5. Header compression: HTTP header size is drastically reduced
6. Stream dependencies: the client can indicate to the server which of the resources are more important than the others