This course is part-one of the nine-part series that starts by taking an in-depth look at how the internet facilitates the movement of data packets across both LANs (Local Area Network) and WANs (Wide Area Network). Students learn how to interpret various protocols such as TCP/IP, HTTP, HTTPs, SMTP and FTP. We examine the entire flow and life-cycle of data-packet movement from origin to destination. The course examines the role of DNS and SMTP servers in routing internet traffic and email transmissions. Mechanism to safeguard the movement of data, such as network routers, ports and firewalls, are also explored.