CISSP Domains: Who’s on first?
I just realized something today that I found a tad bit annoying. The numbering of the domains of the CISSP Common Body of Knowledge (CBK) is actually trivial (can’t think of a better word at the moment). I am reviewing some items on my CISSP notes today and was looking at Domain 2: Telecommunications and Network Security. I wanted to compare some of my notes (written in 2006) to whatever else I can find in the web.
So I Googled, “CISSP Domain 2”. The result was TechTarget’s SearchSecurity.com listed at number 1. And it says “CISSP Domain 2 quiz: Access Control.” Access Control? What do you mean Access Control? I thought “Telecommunications and Network Security” is the CBK”s Domain 2?
At first I thought it was a mistake by TechTarget, but as I go down the Google search result they all say Access Control. Was I smoking something when I was typing my notes 4 years ago? You are probably saying, “well Don, what is the big deal?” It sort of kinda a big deal, since if you have been following my entries in this blog, I have Access Control listed as Domain 1 and Telecommunications and Network Security is Domain 2. Don’t want to end up losing street cred here
. Plus really it bugs me not being able to figure out how I could have done such a mistake.
So I visited the original source, I went to ISC2.org and looked up how they listed the domains. And this is what I found:
- Access Control
- Application Development Security
- Business Continuity and Disaster Recovery Planning
- Cryptography
- Information Security Governance and Risk Management
- Legal, Regulations, Investigations and Compliance
- Operations Security
- Physical (Environmental) Security
- Security Architecture and Design
- Telecommunications and Network Security
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If you notice the list is in alphabetical order. There is no direct number designation for each domain. I also used the Shon Harris All-in-One book (
) primarily to do my review. Since I don’t have the book handy (it is stuck somewhere in storage), I went to Amazon and looked up the book and see if I can view the table of contents inside. The book is now on its fifth edition (CISSP All-in-One Exam Guide, Fifth Edition) and I know I have an older version. The oldest version I can find that has the Amazon Look Inside feature is the Third Edition. And voila! There it is the first domain discussed is Access Control and therefore making it Domain 1, right?

But wait, it also lists Telecommunications & Network Security fourth in the list, which means I am still up in smoke
. I looked up the publication date of the third edition and it shows as September 15, 2005. I bought my book in 2003 and this means I have the older edition, which may have a different way of listing the domains. I can’t prove that since I don’t have the book and I don’t feel like diving into the abyss otherwise known as my storage, I just continued Googling for answers.
I looked up the Official CISSP book (
) that I have (Official (ISC)2 Guide to the CISSP CBK ((ISC)2 Press)) and it lists “Information Security Governance and Risk Management” as Domain 1, while “Access Control” is Domain 2. I really could care less, I already passed the exam, I already have 120 CPEs and I am on time on my membership payments to ISC2, so I am set to get my CISSP cert to be renewed by September this year. But this difference in numbering does bug me. Now I think about it, I did notice the numbering difference when I bought the Official CISSP book in 2006, I didn’t pay much attention to it for some reason since I was already deep into my studying of the Shon Harris book. What was I smoking? What was Ms. Harris smoking? Well to be quite sure, nothing.


As I did further Googling I landed into another SearchSecurity.com site. The site that started this little hubbub. And guess what I found?
Domain 1 is “Telecommunications & Network Security”, Domain 2 “Physical Security”…
Whut!?!
Yep, the site contradicted itself.
So a quick conclusion after all this little exercise in WTF, I concluded that OFFICIALLY there are 10 Domains in the CISSP Common Body of Knowledge. Which domain comes first, next and last, is NOT AN OFFICIAL RANKING OR NUMBERING. Don’t get too hung up on this while you are studying, you will not encounter a question in the exam that says, “In Domain 2 of the CBK…”, it will instead more than likely say, “In the Access Control Domain of the CBK…”
All that said, I wish you goodluck on the exam. If you are not taking the exam, thank you for reading
. Happy weekend.
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