The course introduces computer networking fundamentals and network security across 14 sessions. The first seven session cover network architectures, OSI and TCP/IP models, Ethernet, switching, VLANs, IPv4 and IPv6 addressing, subnetting, routing, TCP and UDP, application-layer protocols, and wireless networks. The remaining seven sessions focus on network threats and attacks, cryptographic foundations, secure communication, authentication, local and wireless network security, firewalls, VPNs, intrusion detection and prevention, security monitoring, and incident response. Practical exercises and case studies develop students’ skills in packet analysis, network troubleshooting, and secure network design.