What Is an FQDN? Fully Qualified Domain Names Explained
What a fully qualified domain name is, how it differs from a hostname and a URL, why the trailing dot matters, and how to set your server's FQDN on Linux.
Networking
What Is a Storage Area Network (SAN)? SAN vs NAS vs DAS
What a storage area network is, how SANs use iSCSI, Fibre Channel and NVMe over Fabrics, and how SAN compares with NAS and direct-attached storage.
What Is DNS? How the Domain Name System Works
How DNS turns domain names into IP addresses: resolvers, root and TLD servers, record types, TTL and propagation, plus dig commands to check yours.
What Is TCP? How the Transmission Control Protocol Works
TCP explained: the three-way handshake, ports, connection states and TCP vs UDP, with real tcpdump and ss output and commands to check your server.
How We Built a Scalable WebRTC Call Center for a Remote BPO Sales Team (VICIdial Case Study)
Focus: VICIdial implementation, WebRTC calling, remote sales team solution Industry: BPO (Business Process Outsourcing) / Call Center Operations Key Technologies: VICIdial, Asterisk 18, PJSIP, WebRTC, ConfBridge, Let’s Encrypt SSL Remote call centers face a critical challenge: deploying agents across locations…
How to Set Up a CDN in 30 Minutes
A slow website loses 53% of visitors in under 3 seconds. Slow page speeds frustrate visitors and hurt your SEO rankings. Every extra second it takes to load a page means fewer conversions, higher bounce rates, and lost revenue. To…