Unit 837: Comprehensive Network Concepts and Security

1. Introduction to Networks

• Definition and purpose of computer networks
• Types of networks: LAN, WAN, MAN, PAN
• Network components: routers, switches, hubs, servers, clients
• Importance of networking in modern computing and daily life

2. Network Topologies

• Overview of network topology concepts
• Bus topology
  • Structure and operation
  • Advantages and disadvantages
• Ring topology
  • Structure and data flow
  • Pros and cons
• Star topology
  • Centralized architecture
  • Benefits and limitations
• Mesh topology
  • Full vs partial mesh
  • Reliability and complexity
• Hybrid topology
  • Combining different topologies
  • Use cases and scalability considerations

3. Network Protocols

• Introduction to network protocols and standards
• TCP/IP Protocol Suite
  • Layers and functions
  • IP addressing and routing basics
• HTTP (HyperText Transfer Protocol)
  • Role in web communication
  • Secure HTTP (HTTPS)
• FTP (File Transfer Protocol)
  • File transfer mechanisms
  • Security considerations
• DNS (Domain Name System)
  • Domain name resolution process
  • Importance in network connectivity

4. Network Security Fundamentals

• Overview of network security
• Authentication methods
  • Passwords, biometrics, multi-factor authentication
• Encryption basics
  • Symmetric vs asymmetric encryption
  • Common encryption protocols (SSL/TLS)
• Firewalls
  • Types and deployment
  • Packet filtering and stateful inspection
• Intrusion Detection Systems (IDS)
  • Detection techniques
  • Signature-based vs anomaly-based IDS

5. Types of Network Attacks

• Common network attack types
• Malware
  • Viruses, worms, trojans
  • Delivery and impact
• Phishing
  • Social engineering techniques
  • Recognizing phishing attempts
• Distributed Denial of Service (DDoS)
  • Attack vectors
  • Effects on network availability
• Man-in-the-Middle (MitM) attacks
  • Interception and data manipulation
  • Prevention strategies

6. Network Security Best Practices

• Implementing access controls
  • Role-based access control (RBAC)
  • Principle of least privilege
• Regular software updates and patch management
• Performing security audits and vulnerability assessments
• Developing and executing incident response plans
  • Identification, containment, eradication, recovery

7. Wireless Network Security

• Challenges unique to wireless networks
• Securing Wi-Fi networks
  • WPA2/WPA3 encryption
  • SSID management and hiding
• Preventing unauthorized access
  • MAC filtering, strong passwords
• Protecting data in wireless transmission
  • VPNs and secure protocols

8. Virtual Private Networks (VPNs)

• VPN concepts and purpose
• Types of VPNs: Remote Access, Site-to-Site
• How VPNs create secure tunnels
• Encryption and authentication in VPNs
• Use cases: remote work, secure browsing

9. Network Monitoring and Management

• Importance of monitoring and management
• Tools overview:
  • SNMP (Simple Network Management Protocol)
  • Wireshark for packet analysis
  • Nmap for network scanning
• Maintaining network performance
• Identifying and responding to security incidents
• Troubleshooting common network issues