HTTP_2
The IETF's binary-framed protocol that includes header compression, multiplexing multiple requests on the same socket, and server-push. HTTP/1.1 semantics are layered on HTTP/2.
HTTP/2 requires deployments of HTTP/2 that use TLS 1.2 support CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, present in Java 8+ and Android 5+. Servers that enforce this may send an exception message including the string INADEQUATE_SECURITY
.