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OSI model

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March 21, 2010  4:42 PM

Book Review: CISSP Video Mentor by Shon Harris



Posted by: Troy Tate
asymmetric encryption, CISSP, education, encryption, ip-sec, ipsec, OSI model, PKI, Shon Harris, technology training, training, video learning

Shon Harris is a well known author of information security training materials. She is the owner and president of Logical Security. I recently had the opportunity to go through her CISSP Video Mentor course presented by Pearson...

May 19, 2009  5:48 PM

Did you see this? TCP/IP networking from the wire up



Posted by: Troy Tate
education, Networking, OSI model, tcp/ip

Here is another source for educating yourself and some of your users on what networking is all about and why fixes are not always explained in simple terms. The example that the author gives of trying to explain to a casual air traveller how all of the devices on an aircraft work together for a...


January 9, 2009  4:38 PM

PROTOCOL analysis vs protocol analysis (with a small p)



Posted by: Troy Tate
Microsoft, Microsoft Exchange, network monitor, OSI model, patches, protocol analysis, SMTP, tcp, wireshark

Recently we had an issue at a site where outbound messages larger than 1MB were backing up in the outbound message queue. The messages were tagged with a 421 4.4.2 Connection dropped error. This was a puzzling issue since the smart relay host was on the local LAN, and in fact, on...


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