General
7 posts — newest first.
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What is Address Resolution Protocol (ARP)?
ARP discovers the MAC address behind an IP address. How the protocol works, the request/reply flow, and where it sits in the networking stack.
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The CAP theorem
Consistency, availability, partition tolerance — you get two. A walk through the CAP trade-offs, database by database.
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The 7 layers of ISO OSI model
The OSI model's seven layers give diverse systems a standard way to communicate. What each layer does and why the model still matters.
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NAS vs SAN – A brief comparison.
NAS serves files over ethernet; SAN serves blocks over a dedicated network. A brief comparison of the two storage architectures and when to pick each.
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Amazon Leadership Principles – my thoughts.
What Amazon's Leadership Principles actually mean in hiring and evaluations — and how to prepare for the behavioral rounds of an Amazon interview.
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Gettings started with Ansible.
Ansible automates configuration and orchestration of infrastructure as code. A getting-started guide: inventory, playbooks, and your first runs.
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Introduction to YAML!
YAML Ain't Markup Language — a human-readable format for configuration. The syntax, the gotchas, and why it's everywhere in infrastructure.