Module 3: Networks

Time Required: 1 Hour

3.1 Module outline and expected learning outcomes

• Introduction to the fundamental aspects of data communication
• Describe the basic components of computer networking
• Learners will be given a simple overview of the key concepts and terminology related to how data is transmitted

3.2 Network conceptual models, protocols and devices

• Open Systems Interconnection (OSI) Model
• The arrangement of various elements of a computer network
• IP Addresses and Routing
• DNS

3.3 The fundamentals of computer networks

• TCP and UDP
• Network Address Translation (NAT)
• Wireless LANs
• Encryption

3.4 Network risks

• Risks and vulnerabilities
  • Hacking and disruption
  • Data loss/exfiltration
  • Misconfiguration

3.5 Securing networks from risks

• Process of configuring secure administrative access network devices
• Purpose of Authentication, Authorisation and Auditing (AAA)
• Digital Signatures and Certificate Authorities
• Key Establishment and Data Transmission
• Introduction to Firewalls – function and operation of a firewall to mitigate risk
• Tools to implement packet filtering
• How to investigate security vulnerabilities
• Basic overview of cryptographic systems and how it is used to encrypt and secure data