Final answer:
The CISSP exam includes eight domains of knowledge, which means the correct answer would be 'c) 8' despite it not being listed as an option in the question.
Step-by-step explanation:
The Certified Information Systems Security Professional (CISSP) exam covers eight domains of knowledge. These domains are:
- Security and Risk Management
- Asset Security
- Security Architecture and Engineering
- Communication and Network Security
- Identity and Access Management (IAM)
- Security Assessment and Testing
- Security Operations
- Software Development Security
Therefore, the correct answer to the question of how many domains of knowledge are covered by the CISSP exam is 'c) 8' (although this option was not listed in the provided choices).