🌐 Networking Fundamentals
How the internet finds and connects machines — IP addresses, DNS, subnets, TLS certificates and domains.
Start learning →- 1What Is an IP Address?Learn what an IP address is, the difference between IPv4 and IPv6, public vs private IPs, and how geolocation works — in plain English.4 min read
- 2Understanding DNS RecordsA clear guide to DNS and its record types — A, AAAA, MX, TXT, NS, CNAME — and how domain names get resolved to IP addresses.5 min read
- 3CIDR & Subnets ExplainedUnderstand CIDR notation, subnet masks, network and broadcast addresses, and how to calculate how many hosts a subnet holds.5 min read
- 4What Is a CSR (Certificate Signing Request)?Understand what a CSR is, what's inside it, how it relates to your private key, and how to decode and check one before you order an SSL certificate.4 min read
- 5How to Check If a Domain Name Is AvailableLearn how to check whether a domain name is available to register, what to do if it's taken, and how WHOIS and DNS help you research a domain.4 min read
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