Network Knowledge Base

Understanding IP addressing, IPv4, IPv6, subnetting, and how devices communicate on networks.

• article What is an IP Address?
• article IPv4 vs IPv6: Key Differences
• article Public vs Private IP Addresses
• article How to Find Your IP Address
• article Understanding Subnets & CIDR

How the Domain Name System works, record types, propagation, and troubleshooting DNS issues.

• article How DNS Works
• article DNS Record Types Explained
• article DNS Propagation: Why Changes Take Time
• article Troubleshooting DNS Issues
• article Best Public DNS Servers

Email authentication, blacklists, spam prevention, and ensuring your emails reach the inbox.

• article SPF Records Explained
• article DKIM: Email Signing
• article DMARC: Putting It Together
• article Getting Off Email Blacklists
• article Email Deliverability Best Practices

Protecting your network, understanding threats, VPNs, firewalls, and security best practices.

• article How to Hide Your IP Address
• article How VPNs Work
• article Firewall Fundamentals
• article SSL/TLS & HTTPS Explained
• article Common Network Threats

How to use essential network diagnostic tools like ping, traceroute, nslookup, and more.

• article How to Use Ping
• article Understanding Traceroute
• article Using nslookup & dig
• article WHOIS Lookups Explained
• article Monitoring Connections with netstat

Essential reference tables for ports, HTTP codes, DNS records, and other networking fundamentals.

• article Common Port Numbers
• article HTTP Status Codes
• article Private IP Address Ranges
• article CIDR Notation Chart
• article DNS Record Types Reference