When the Application sensor receives traffic on that port, the protocol decoder will try to determine if the received data matches the HTTPS traffic In this case it will not match because it is P2P traffic, so this will class as violation and blocked The protocol decoder also try to determine what type of traffic it is, and even if it could not figure out it is P2P traffic, it still count as a violation because even though it does not know what it is, it knows for fact it is not HTTPS