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The OSI Model: Fundamentals
·1128 words·6 mins
A practical breakdown of the 7 OSI layers, what happens at each one, the protocols involved, and how to troubleshoot at each level.
The OSI Model: Intermediate Concepts
Deeper networking concepts mapped to OSI layers — packet captures, TCP internals, MTU issues, NAT, firewalls, and L4 vs L7 load balancing.
The OSI Model: Advanced Concepts
·1681 words·8 mins
Production-level networking — BGP, anycast, container networking, mTLS, eBPF, service meshes, and network observability.
Vim Basics: Navigating and Editing
A practical introduction to Vim — modes, movement, basic editing, and the commands you need to be productive from day one.
Vim Configuration: Making It Yours
How to configure Vim with .vimrc — essential settings, key mappings, the leader key, and a practical starter configuration.