I rarely write about Internet Explorer. In part, its because I don't use it, but also, on the assumption that no one that reads a Defensive Computing blog uses it either. Nonetheless, I included it in this series on limiting web browsers to TLS 1.2, because, frankly, it does such a good job of it.
To recap, there are six versions of the security protocol that underlies secure websites, those transmitted with HTTPS rather than HTTP. The two oldest versions SSL 2 and SSL 3 have not been considered secure for a very long time and are no longer used by websites or web browsers. The next three versions, known as TLS 1.0 and TLS 1.1 and TLS 1.2 are the topic at hand. There is an even newer version, TLS 1.3, but it is still in draft status and hardly used anywhere.