4.9.3 The Internet

4.9.3 The Internet

1. Internet Security

   • Asymmetric (Public Key) Encryption
     • Key exchange
   • Malware
     • Trojans
     • Worms
     • Viruses
   • Vulnerabilities malware exploit
     • Measures to protect against malware attacks
   • Symmetric (Private Key) Encryption
     • Key exchange
   • How a firewall works?
     • Stateful inspection
     • Packet filtering
     • Proxy server
   • Digital certificates
     • How are they obtained and used?
   • Digital signatures
     • How are they obtained and used?

2. Packet switching and routers

   • Packet switching
     • Main components of a data packet
   • Gateway
   • How is routing achieved?
     • Role of routers

3. Structure of the Internet

   • Uniform Resource Locator (URL)
   • Domain name
   • IP address
     • 4.9.5 IP addresses
   • How are domain names organised?
   • Purpose and function of the Domain Name System (DNS)
   • Need for Internet registries
     • Service provided