diff --git a/README.md b/README.md
index da1ef8d..b44d557 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 # Minitel
 An easy-to-implement networking protocol for OpenComputers. Not to be confused with the French computer network of the same name.
 
-See [protocol.md](protocol.md) for more information on the protocol itself.
+## Layers
+Minitel presently implements [layer 3](protocol-3.md) of the OSI model.
diff --git a/protocol.md b/protocol-3.md
similarity index 97%
rename from protocol.md
rename to protocol-3.md
index c8dd4a6..0c9606c 100644
--- a/protocol.md
+++ b/protocol-3.md
@@ -1,4 +1,4 @@
-# Minitel - An easy to implement LAN protocol
+# Minitel - Layer 3
 
 ## Language
 Node - a device of some description on a Minitel network, ie a computer, server, microcontroller or drone.