An explanation of what DNS (Domain Name System) is and its role on the Internet.

Created on 10 March, 2025 • Tools • 9 views

A brief introduction to DNS lookup tools and their importance to administrators and developers.

Introduction
- An explanation of what DNS (Domain Name System) is and its role on the Internet.
- A brief introduction to DNS lookup tools and their importance to administrators and developers.

### Basic DNS lookup features
- Domain Name Resolution: How DNS translates human-friendly domain names into IP addresses.
- Record types: A, AAAA, CNAME, MX, and others. Explanation of their meanings and applications.
- Caching: How DNS servers cache queries to improve performance.

### Popular tools for DNS lookups
- nslookup: a command-line utility for checking DNS records.
- dig: a more powerful tool for performing DNS queries.
- whois: used to get information about the owner of a domain.
- Examples of using each tool with commands and their output.

### Application of DNS lookup tools
- Problem Diagnosis: how DNS queries help identify problems accessing sites.
- Security: Using DNS to detect suspicious activity and defend against attacks.