Internet Technology And Security
Published 5/2026
Created by Charles Severance, Brent Severance
MP4 | Video: h264, 1920x1080 | Audio: AAC, 44.1 KHz, 2 Ch
Level: Intermediate | Genre: eLearning | Language: English + subtitle | Duration: 24 Lectures ( 4h 45m ) | Size: 5.87 GB
⚡ Understand how data moves across the Internet using packet switching, IP routing, and layered network architecture
⚡ Explain how TCP ensures reliable, ordered communication over an unreliable network
⚡ Describe how domain names, ports, and protocols enable application-level communication like the web
⚡ Understand core security concepts including encryption, hashing, public key cryptography, and digital certificates
Requirements
❗ No prior experience or courses are required
Description
This course offers a clear and practical introduction to how the Internet works, guiding you from the fundamental mechanics of data transmission all the way to modern security techniques that protect everyday online communication.
We begin by building an intuitive understanding of networking from the ground up. You will learn how data is broken into packets, how those packets travel across shared infrastructure, and how routing decisions are made using IP addresses. From there, we explore how systems like DNS make the Internet usable for humans by translating names into network locations.
Next, the course explains how reliable communication is achieved over an inherently unreliable network. You will see how TCP ensures that data arrives correctly, in order, and at the right speed, forming the foundation for everything from email to streaming video. We then move up to the application layer, where protocols like HTTP power the web through simple but powerful request-response interactions.
In the second half of the course, we shift focus to security. You will learn how encryption protects confidentiality, how hashing ensures data integrity, and how public key cryptography solves the challenge of secure communication between strangers. Finally, we examine how digital certificates and certificate authorities establish trust, enabling secure connections like HTTPS.
Throughout the course, the emphasis is on understanding rather than memorization. By the end, you will have a strong mental model of how the Internet operates and how its core technologies fit together in a coherent, real-world system.
Who this course is for
⭐ This course is designed for learners who want a clear, conceptual understanding of how the Internet works without needing advanced mathematics or prior programming experience. It is especially valuable for students, educators, and professionals who use technology every day but want to better understand what happens "under the hood." If you are beginning your journey in computing, this course will give you a strong mental model of networking and security concepts that are foundational to fields like web development, cybersecurity, and IT. If you already have some technical experience, it will help you connect the pieces-from IP and TCP to HTTP and encryption-into a coherent, end-to-end picture. This course is also a good fit for instructors looking for approachable material to support teaching, or for curious learners who enjoy understanding the deeper structure behind everyday technologies like the web, secure connections, and online communication.