Foundations of HTTP, HTTPS, and Web Security

Every interaction on the modern web relies on a fundamental set of rules that govern how data is sent and received. Understanding HTTP and HTTPS is crucial for anyone looking to build, secure, or analyze web applications. This course guides you from the absolute basics of web communication to a solid understanding of secure data transfer. You will learn how web browsers interact with servers, how data is structured in requests and response cycles, and how encryption protocols protect sensitive user information from interception. What you'll learn: Understand the core structure of HTTP requests and responses, including methods, headers, and status codes; Explore the transition from HTTP to HTTPS and how TLS encryption secures data in transit; Analyze common web communication vulnerabilities and how secure protocols mitigate these risks; Learn to interpret key security headers such as HSTS, CORS, and Content Security Policies; Discover how modern protocol updates like HTTP/2 and HTTP/3 improve both performance and security. Starting with essential networking terminology and basic conceptual definitions, the material progresses systematically to encryption mechanics, certificate authorities, and practical header configurations. Designed for absolute beginners, aspiring web developers, and IT professionals, this course requires no prior networking or programming experience. Start reading today to master the invisible backbone of the secure web.