Update README

README.md

@@ -2,6 +2,15 @@
 
 This repository contains the YANG models published by Arista Networks.
 
+Arista EOS supports YANG-model based configuration management and
+streaming telemetry over
+[gNMI](https://github.com/openconfig/reference/tree/master/rpc/gnmi)
+(the gRPC Network Management Interface),
+[NETCONF](https://tools.ietf.org/html/rfc6241), and
+[RESTCONF](https://tools.ietf.org/html/rfc8040). YANG models are
+encoded as JSON in Google Protocol Buffers by gRPC, XML by NETCONF,
+and JSON by RESTCONF.
+
 The `release/` directory contains the fully supported Arista
 YANG models. Fully supported means that the models are fully
 reviewed, commented, and tested, and will continue to be supported
@@ -13,6 +22,4 @@ and deviations for OpenConfig models supported by EOS.
 The `experimental/` directory contains the Arista YANG models that do
 not meet the criteria for being under `release/`, but which we want
 to make available to customers who need them before they are
-fully supported. These models are not loaded by the OpenConfig
-agent in EOS by default. Instead they must be explicitly enabled
-by the CLI.
+fully supported.