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Computer Networks

Foundations of Networking4

Physical Layer & Signals3

Data Link Layer6

Network Layer & Routing6

Transport Layer5

Application Layer & The Web4

Wireless, Security & Performance3

Encryption and how HTTPS keeps a connection private
Firewalls, and the attacks they defend against
Wi-Fi standards and real-world network performance

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Computer Networks

Foundations of Networking4

Physical Layer & Signals3

Data Link Layer6

Network Layer & Routing6

Transport Layer5

Application Layer & The Web4

Wireless, Security & Performance3

Encryption and how HTTPS keeps a connection private
Firewalls, and the attacks they defend against
Wi-Fi standards and real-world network performance

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Encryption and how HTTPS keeps a connection private

Why plain HTTP is like a postcard anyone can read, and the clever math (public-key cryptography) that lets two strangers agree on a secret key in public.

10 min readUpdated 2026-09-03computer-networkssecurityhttpsencryption