Updated Protocol and compatibility (markdown)

Protocol-and-compatibility.md

@@ -19,5 +19,5 @@ At the link level, APRS uses the AX.25 protocol, as defined in AmateurPacket-Rad
 - Information Field — This field contains more APRS data. The first character of this field is the APRS Data Type Identifier that specifies the nature of the data that follows.
 - Frame Check Sequence — The FCS is a sequence of 16 bits used for checking the integrity of a received frame.
 
-# TNC2 text protocol
+# APRS TNC2 text protocol
 TNC2 protocol does not use KISS, it sends text based APRS messages, multiple messages are separated by using new line character `\n`.