Network Security
Network security encompasses the technologies, policies, and practices designed to protect the integrity, confidentiality, and availability of computer networks and data.
Explanation
Key network security components include firewalls (filter traffic between networks), intrusion detection/prevention systems (IDS/IPS), encryption (protects data in transit and at rest), VPNs (create secure tunnels over public networks), and network segmentation. Defense-in-depth layers multiple security controls so that if one fails, others still protect the system. Common threats include malware, phishing, denial-of-service attacks, man-in-the-middle attacks, and ransomware.
Key Points
- •Defense-in-depth: multiple layers of security controls
- •Firewalls filter traffic; IDS detects threats; IPS blocks threats
- •Encryption protects data in transit (TLS/SSL) and at rest (AES)
Exam Tip
IDS detects and alerts; IPS detects and actively blocks. Know the difference — IPS takes automatic action while IDS only monitors and reports.
Frequently Asked Questions
Related Topics
Access Controls
Access controls are security measures that restrict who can view, modify, or use computing resources, ensuring that only authorized individuals can access systems and data.
Cybersecurity Frameworks
Cybersecurity frameworks are structured sets of guidelines and best practices that organizations use to manage and reduce cybersecurity risk.
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