Hypertext Transfer Protocol (HTTP) is an application level network protocol that is used for the transfer of content on the World Wide Web.
SPDY is an experimental protocol for multiplexing multiple, concurrent streams (typically HTTP request/response streams) over a single TCP connection.
"Http 2 is even better than spdy and check this article for a use case regarding spdy"
from question "HTTP2 protocol impact on web developement?"
"Anything that you do with http is more or less equivalent with spdy and neither is really anything but an implementation detail of your soa work"
from question "Using SPDY in a SOA architecture"
"Spdy is a more efficient protocol than http"
from question "Using SPDY as an underlying transport for SOA related implementations"
"In fact with optimizations like spdy you might find that a tls-secured connection actually performs better than plain http"
from question "How to encrypt parts of a webpage with node.js"