Drew the whole OSI stack because I got tired of googling which layer TLS sits on. Many years in. Still counting on my fingers. In practice I touch three of them. Physical, when someone unplugged the thing. Network, when it is DNS. Application, when it is also DNS. Presentation I had to look up. Twice. The first result was a mnemonic about pizza so I closed the tab out of spite. Layer 5 is in there too. Doing something. Allegedly. #OSIModel #Networking #DevOps #SysAdmin #ItsAlwaysDNS #Blog #Thoughts