Network Security Fundamentals And Concepts -

, which serves as the foundational framework for all security policies: Confidentiality

| Protocol | Layer (OSI) | Security Role | |----------|-------------|----------------| | | Network (3) | Encrypts entire IP packets (VPNs). | | TLS/SSL | Transport (4) | Secures application data (HTTPS, FTPS). | | SSH | Application (7) | Secure remote administration. | | SNMPv3 | Application (7) | Secure network device monitoring. | | 802.1X | Data Link (2) | Port-based NAC authentication. | Network Security Fundamentals and Concepts

| Principle | Description | Example | |-----------|-------------|---------| | | Ensuring data is accessible only to authorized parties. | Encryption, access control lists (ACLs). | | Integrity | Guaranteeing that data has not been altered by unauthorized means. | Hashing, digital signatures, checksums. | | Availability | Ensuring systems and data are accessible when needed. | Redundancy, DDoS protection, failover clusters. | , which serves as the foundational framework for

In Zero Trust: