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Computer Networks

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Network Layer & Routing6

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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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Firewalls, and the attacks they defend against

How a firewall decides what traffic to let through, and simple explanations of DoS attacks, spoofing, and man-in-the-middle attacks.

8 min readUpdated 2026-09-03computer-networkssecurityfirewallsddos