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Layer 3 networking and routing visualization

Networking 2025-12-16

TCP/IP Model and Layer 3 Networking (Routing)

A practical explanation of the TCP/IP model with emphasis on Layer 3 (routing), IP addressing, and routing protocols such as OSPF and BGP.

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Network security and firewall architecture

Network & Security 2025-12-16

Firewalls and Network Segmentation

Learn how to design firewall policies and network segmentation to isolate systems, reduce attack surface, and improve compliance.

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DNS Networking 2025-12-16

DNS Deep Dive: How Domain Resolution Really Works

A developer-friendly deep dive into DNS: TLDs, authoritative servers, recursive resolvers, caching, and common record types (A, AAAA, CNAME, MX, TXT).

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Networking Internet 2025-12-16

How the Internet Works — From Packets and Protocols to Global Infrastructure

Learn how the internet works behind the scenes, from data packets and protocols to routing, DNS, and worldwide infrastructure.

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Reverse proxy and traffic flow architecture

Networking DevOps 2025-12-13

Reverse Proxy Patterns: Architectures for Scalable Web Applications

Understand reverse proxy patterns such as load balancing, SSL termination, caching, API gateways, and edge proxies, and learn when to use each in modern web architectures.

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Cybersecurity 2025-12-13

Zero-Trust Networks: Principles and Best Practices

Learn the principles of zero-trust networks. Understand how micro-segmentation, continuous verification, and least-privilege access protect modern networks.

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