Cloud & Network
AWS, Kubernetes, Terraform, network design, and running things in production without it falling over at 2am.
How Internet Requests Actually Work: A Complete Beginner Series
A practical roadmap to understanding how DNS, IP addresses, ports, TCP, UDP, packets, HTTP, TLS, routers, firewalls, and application servers work together when you use the internet.
HTTP Requests Explained: Methods, URLs, Headers, and Bodies
Learn what an HTTP request really contains, how GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS differ, and how browsers interpret URLs, headers, query strings, and request bodies.
DNS, Domain Names, and IP Addresses Explained
Understand why computers use IP addresses, why people use domain names, and how DNS caches, resolvers, and authoritative servers translate a hostname into a reachable destination.
Public IP, Private IP, NAT, and Ports Explained
See how private devices share a public IPv4 address through NAT, how source and destination ports identify network flows, and why one server can safely run many services.
TCP vs UDP: Connections, Reliability, and Real-Time Traffic
Learn how the TCP handshake creates reliable ordered communication, why UDP uses simpler datagrams, and how applications choose between reliability, latency, and control.
Packets and Network Layers: MAC, Switches, Routers, and Gateways
Follow application data as it is encapsulated into TCP segments, IP packets, and Ethernet or Wi-Fi frames, then forwarded through switches, routers, and a default gateway.
What Happens When You Open a Website? The Complete Request Journey
Trace a browser request from URL parsing and DNS through routers and NAT to a firewall, load balancer, reverse proxy, application, cache, database, and the response journey back.
HTTPS, TLS Handshakes, and HTTP Status Codes Explained
Understand how TLS adds encryption, integrity, and server authentication to HTTP, what browsers verify in a certificate, and what common 2xx, 3xx, 4xx, and 5xx status codes mean.
Practical Network Troubleshooting: Ping, DNS, Ports, Cloud, and Containers
Use ping, dig, curl, traceroute, route, and socket tools correctly; distinguish latency from bandwidth; and apply the same networking fundamentals to localhost, cloud networks, Docker, and Kubernetes.
Setting Up a Production AWS Landing Zone with Terraform
Most teams skip the basics when they move to AWS and pay for it later. This walkthrough covers multi account setup with AWS Organizations, service control policies, network segmentation, and central logging, all written as code.
Kubernetes Network Policies: Locking Down Pod Communication
By default every pod in a Kubernetes cluster can talk to every other pod. That is a big security gap. This post shows how to write network policies that enforce least privilege and keep traffic where it belongs.
Moving Compute Closer to Users Without Breaking Consistency
Edge functions and regional deployments reduce latency but introduce new challenges around data consistency and deployment complexity. This covers the patterns that work well and the tradeoffs you need to understand before going edge.