Description of the TLS protocol and packets
http://blog.fourthbit.com/2014/12/23/traffic-analysis-of-an-ssl-slash-tls-session [blog.fourthbit.com]
2016-11-09 19:53
Some things will change, especially with 1.3, but still a good introduction to how TLS works.
And a guide to certificates: http://www.cem.me/pki/index.html
First few milliseconds of TLS: http://www.moserware.com/2009/06/first-few-milliseconds-of-https.html
Slightly updated: https://security.stackexchange.com/questions/131724/the-first-few-milliseconds-of-an-https-connection-tls-1-2-tls-echde-rsa-with/133708#133708