Formal methods play an important role in validating networking protocols. During the development of TLS 1.3, formal methods have helped to identify several issues with draft versions of the protocol that have been fixed before finalising the protocol. In the transport layer, the QUIC protocol has been proposed to replace the HTTP/TLS/TCP stack. This protocol is being finalised within the IETF and deployed by Google, Cloudlfare, Facebook and many others.
