Knowledge Base
Knowledge Base
Learn the fundamentals behind domains, DNS, and web infrastructure.
What is a Domain Name?
How domains work, registrars, registries, TLDs, and the anatomy of a URL.
How DNS Works
The DNS resolution chain — root servers, nameservers, resolvers, TTL, and caching.
Choosing the Right Domain Name
Tips for picking a memorable domain, TLD selection, and branding.
What is a WHOIS Lookup?
How domain registration data is published and what it reveals.
What is an IP Address?
IPv4 vs. IPv6, public vs. private addresses, CIDR notation, and reverse DNS basics.
Understanding the Network Stack
The OSI model in practice — Layer 4 vs. Layer 7, TCP vs. UDP, and how they relate to firewalls and DDoS protection.
Choosing the Right Linux Distribution
Ubuntu vs. Debian vs. AlmaLinux — target use cases, package managers, release cycles, and community support.
Securing Your VPS
Practical hardening guide — SSH key auth, firewall setup, automatic updates, fail2ban, and reducing attack surface.