Unit 839: Comprehensive Network Security

1. Introduction to Networking

1.1 Basics of Networking

• Definition and purpose of computer networks
• Overview of data transmission

1.2 Network Types

• LAN, WAN, MAN, PAN
• Wired vs Wireless networks

1.3 Network Components

• Routers, switches, hubs, access points
• Network interface cards (NICs)

1.4 Network Protocols

• TCP/IP suite overview
• Common protocols: HTTP, FTP, SMTP, DNS

1.5 OSI Model

• Seven layers explained: Physical, Data Link, Network, Transport, Session, Presentation, Application
• Role of each layer in data transmission

2. Network Security Fundamentals

2.1 Importance of Network Security

• Protecting data integrity, confidentiality, and availability
• Consequences of security breaches

2.2 Common Security Threats

• Viruses, worms, trojans
• Social engineering

2.3 Basic Security Measures

• Firewalls: types and functions
• Encryption concepts and types (symmetric, asymmetric)
• Authentication protocols (e.g., passwords, two-factor authentication)

3. Types of Network Attacks

3.1 Malware

• Definitions and examples
• Infection methods and impact

3.2 Phishing Attacks

• Tactics used by attackers
• Recognizing phishing attempts

3.3 Distributed Denial of Service (DDoS) Attacks

• Mechanisms and effects
• Botnets overview

3.4 Man-in-the-Middle (MitM) Attacks

• How MitM attacks intercept communications
• Prevention techniques

4. Network Security Best Practices

4.1 Password Management

• Characteristics of strong passwords
• Password policies and management tools

4.2 Software Updates and Patch Management

• Importance of regular updates
• Vulnerability management

4.3 Network Segmentation

• Benefits and methods
• VLANs and subnetting basics

4.4 Monitoring and Incident Response

• Network monitoring tools
• Incident detection and response strategies

5. Wireless Network Security

5.1 Wireless Network Vulnerabilities

• Open networks
• Rogue access points

5.2 Security Techniques for Wireless Networks

• WPA and WPA2 encryption standards
• MAC address filtering
• SSID hiding

5.3 Best Practices

• Using VPNs over wireless
• Physical security considerations

6. Intrusion Detection and Prevention Systems (IDPS)

6.1 Overview of IDPS

• Definitions and purpose

6.2 Types of IDPS

• Network-based (NIDS)
• Host-based (HIDS)
• Hybrid systems

6.3 Deployment Strategies

• Placement in network topology
• Configuration considerations

6.4 Role in Network Security

• Real-time threat detection
• Automated response capabilities

7. Virtual Private Networks (VPNs)

7.1 Introduction to VPNs

• Purpose and benefits

7.2 VPN Protocols

• PPTP, L2TP, IPSec, SSL/TLS

7.3 Tunneling Concepts

• How tunneling secures data

7.4 Use Cases

• Remote access
• Secure communication over public networks

8. Network Security Policies and Compliance

8.1 Importance of Security Policies

• Establishing rules and standards

8.2 Compliance Requirements

• GDPR overview
• HIPAA basics

8.3 Audits and Risk Assessments

• Purpose and procedures
• Risk management strategies

8.4 Continuous Improvement

• Policy review and updates
• Training and awareness