strange statement and question about security zones in PCNSA study guide

[ppk_vs]

Hi everyone,

I am reading a study guide for PCNSA now, and cannot understand this statement about security zones, p 67, 2.6:

"Security zones are divided into two broad categories: Intrazone and Interzone."   That sounds really strange, how can be some zone related to intrazone or interzone? That is about the traffic flow, so shows between which zone traffic goes, so it can be used as a security policy characteristic, but not for a single zone.

   But after there is a question which is even more strange:

Q1. Which two default zones are included with the PAN-OS software? (Choosetwo.)
a) Interzone
b) Extrazone
c) Intrazone
d) Extranet

With a correct answer A,C. So, suddenly study guide's author change his opinion about "Interzone" and "Intrazone" that they are not zone categories, but some default zone names. But this is also for me sounds really strange, I have never seen such default zones and cannot find it in documentation.