Communication and Network Security dives into secure design principles for networks, covering OSI/TCP/IP models, IPv4/IPv6, and protocols like IPSec, SSH, SSL/TLS. It explores network segmentation (physical, logical, micro), performance metrics, and traffic management. Topics include VoIP, wireless technologies, SDNs, and cloud networking with VPCs. The course also addresses secure network components, access control, endpoint security, and implementing secure communication channels for voice, video, and remote access. Essential for security professionals, it equips you with knowledge to design and manage secure networks effectively.