Here’s my list of IT/security basics that I think IT auditors ought to know. If you can’t understand and audit these items, you do not know enough about technology to avoid having the wool pulled over your irises (not matter how good an auditor you are). The list is in no particular order.
If you’re a CISA or CISSP and you don’t know the following, I think you have some work to do.
ITauditSecurity 