Computer Science

Networks & security

4 free resources, hand-picked and sorted so you can find the right fit for your level and time.

Computer systems
Topics in Computer Science
Algorithms & theory2 Databases & SQL5 Learn to code3 Web & app development9 Software engineering & tools0 Programming languages11 Computer systems4 Networks & security4
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4 resources

C Website David J. Malan · edX / Harvard

CS50's Introduction to Cybersecurity

Harvard's dedicated cybersecurity course - passwords phishing encryption authentication privacy and securing systems. F… Beginner 10 – 40 hrs Full course Exercises Certificate No prerequisites View YouTube Fireship (Jeff Delaney) · YouTube / Fireship

Ethical Hacking in 100 Seconds

A sharp 100-second intro to ethical hacking and penetration testing - what it is why it matters and how CORS fits in. P… Beginner Under 30 min Single video No prerequisites View I Website Vint Cerf & Khan Academy · Khan Academy

Internet Protocols - Khan Academy / Code.org

Short videos by Khan Academy and Code.org - with Vint Cerf explaining IP addresses DNS packets and encryption. Beginner Under 30 min Video series No prerequisites View YouTube Carrie Anne Philbin · YouTube / PBS

The Internet - Crash Course Computer Science #29

A crisp 12-minute animated explainer of how the internet works - IP DNS TCP UDP and the OSI model. The best single-vide… Beginner Under 30 min Single video No prerequisites View