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DNS Basics
How names resolve
DNS maps human-friendly domain names to IP addresses using recursive resolvers, authoritative servers, and caching to speed lookups and route traffic.
- resolver
- authoritative
- caching
- ttl
- records
How It Works
Clients ask recursive resolvers, which query root, TLD, and authoritative servers.
Records
Common records: A/AAAA, CNAME, MX, TXT; TTL controls caching.
Operate
Monitor zones, set sensible TTLs, and secure with DNSSEC where needed.
Keep Exploring
Guides
API Basics
APIs let software request data or actions from other systems through defined endpoints and responses.
Comparison
RAM vs Storage
RAM handles what your device is actively working on, while storage keeps apps, files, and system data available over time.
How it works
Global Positioning System
GPS uses timing signals from satellites to calculate a receiver's position on Earth.
What it is
Blockchain
A blockchain is a distributed ledger secured by cryptography and consensus nodes.