- CISSP in 21 Days Second Edition
- CISSP in 21 Days Second Edition
- Credits
- About the Author
- About the Reviewer
- www.PacktPub.com
- Preface
- 1. Day 1 – Security and Risk Management - Security, Compliance, and Policies
- 2. Day 2 – Security and Risk Management - Risk Management, Business Continuity, and Security Education
- 3. Day 3 – Asset Security - Information and Asset Classification
- 4. Day 4 – Asset Security - Data Security Controls and Handling
- 5. Day 5 – Exam Cram and Practice Questions
- 6. Day 6 – Security Engineering - Security Design, Practices, Models, and Vulnerability Mitigation
- 7. Day 7 – Security Engineering - Cryptography
- 8. Day 8 – Communication and Network Security - Network Security
- An overview of communication and network security
- Network architecture, protocols, and technologies
- Open System Interconnect (OSI) model
- OSI layers and security
- Application layer protocols and security
- Presentation layer protocols and security
- Summary
- Sample questions
- 9. Day 9 – Communication and Network Security - Communication Security
- An overview of communication security
- Security in communication channels
- Attacks on communication networks
- Preventing or mitigating communication network attacks
- Summary
- Sample questions
- 10. Day 10 – Exam Cram and Practice Questions
- 11. Day 11 – Identity and Access Management - Identity Management
- 12. Day 12 – Identity and Access Management - Access Management, Provisioning, and Attacks
- 13. Day 13 – Security Assessment and Testing - Designing, Performing Security Assessment, and Tests
- An overview of security assessment and testing
- Security assessment and test strategies
- Security controls
- Summary
- Sample questions
- 14. Day 14 – Security Assessment and Testing - Controlling, Analyzing, Auditing, and Reporting
- 15. Day 15 – Exam Cram and Practice Questions
- 16. Day 16 – Security Operations - Foundational Concepts
- An overview of operations security
- The physical security design
- Physical and operations security controls
- Operations/facility security
- Protecting and securing equipment
- Computer investigations
- Summary
- Sample questions
- 17. Day 17 – Security Operations - Incident Management and Disaster Recovery
- 18. Day 18 – Software Development Security - Security in Software Development Life Cycle
- 19. Day 19 – Software Development Security - Assessing effectiveness of Software Security
- 20. Day 20 – Exam Cram and Practice Questions
- 21. Day 21 – Exam Cram and Mock Test
In this chapter, we covered some of the concepts in telecommunications and the network security domain.
We've revised Open System Interconnect (OSI) and the TCP/IP protocol suite. OSI forms the baseline for other models such as TCP/IP. There are seven layers in an OSI model, with the layers stacked. Each layer has a communication mechanism using protocols. A protocol or an implementation of it may have vulnerabilities that can be exploited by threat agents. Countermeasures have to applied to improve the security.
In the next chapter, we will cover the next four layers in the OSI model, the application of cryptography in communication security, and concepts related to securing network components.
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