Networking
DNS Record Types Explained: A, AAAA, CNAME, MX, TXT and More
A practical guide to every DNS record type you'll encounter: A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, CAA, PTR with real configuration examples.
Blog
Deep-dive technical articles on cloud architecture, networking, security, databases, and infrastructure. Written by practitioners who build and scale production systems.
Networking
TCP vs UDP: The Complete Guide to Transport Layer Protocols
A thorough comparison of TCP and UDP covering reliability, performance, use cases, and when QUIC changes the equation for modern applications.
Cloud Architecture
What Does Serverless Really Mean? Cutting Through the Marketing
A principal architect with 30 years of infrastructure experience explains what serverless actually means, when it works brilliantly, and when it falls flat.
Networking
How Does a CDN Work? Content Delivery Networks from Edge to Origin
Understand how CDNs cache and deliver content from edge servers, DNS-based routing, cache hierarchies, and when to use (or skip) a CDN.
Networking
Layer 4 vs Layer 7: Load Balancing, Firewalls, and Why It Matters
Understand the practical differences between Layer 4 and Layer 7 for load balancers, firewalls, and proxies with real architecture examples.
Cloud Architecture
EC2, EBS, EFS, Lambda: What They Really Are vs Physical Hardware
A veteran cloud architect maps AWS compute and storage services to their physical hardware equivalents, explaining what EC2, EBS, EFS, and Lambda really are under the hood.
Networking
The OSI Model Explained: All 7 Layers with Real-World Examples
Master the OSI model's 7 layers with practical examples, real protocols at each layer, and why this framework still matters for troubleshooting.
Networking
Routing Protocols Explained: OSPF, BGP, RIP, EIGRP and When to Use Each
A practical guide to routing protocols: OSPF, BGP, RIP, and EIGRP compared with real-world use cases, configurations, and selection criteria.
Networking
What is MPLS? Multiprotocol Label Switching Explained for Modern Networks
Understand MPLS label switching, how it differs from IP routing, its role in enterprise WANs, and why SD-WAN is replacing it in many networks.
Cloud Architecture
Virtualization and Hypervisors: How Virtual Machines Actually Work
A principal architect explains how virtualization and hypervisors actually work under the hood, from CPU privilege rings to memory overcommit, with real war stories.
Networking
What is SNI (Server Name Indication)? How TLS Powers Multi-Domain Hosting
Learn how SNI lets one IP address serve TLS certificates for multiple domains, why it was invented, and what happens when clients don't support it.
Cloud Architecture
What is Cloud Computing? A No-BS Guide from Someone Who Built Data Centers
A veteran architect who built physical data centers explains what cloud computing actually is, how it works under the hood, and why it matters for your infrastructure decisions.