I've been in IT for years now and I have to watch videos like this to keep my mind fresh. Listen to this guy!!! This was a great presentation! Better than most I've seen before on the topic of OSI.
Hate being the person to point out a mistake, especially when the content you put out is so awesome, however when you spoke about ports you indicated SNMP (Simple Network Management Protocol) as using port 25 and being for email, however that should be SMTP (Send Mail To People).
