Hostnames and IPs: The Language of the Internet

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About Course

Sucuri Security Academy

Hostnames and IPs: The Language of the Internet

Understanding the difference between a hostname and an IP address is a fundamental skill for anyone managing a website.

This course introduces both concepts in clear, practical terms. You’ll learn how IP addresses uniquely identify devices on the internet, how hostnames provide a human-friendly way to reference them, and how the Domain Name System (DNS) connects the two.

Course Objectives

✓ Differentiate Hostnames & IPs

Understand how IP addresses uniquely identify devices on the internet and how hostnames provide human-friendly references.

✓ Master DNS Resolution

Learn how the Domain Name System connects hostnames to IP addresses and how resolution functions under the hood.

✓ Troubleshoot Connectivity

Discover how to diagnose common connectivity issues using real-world command-line tools like ping and traceroute.

✓ Apply Network Concepts

Build the confidence to apply these fundamentals directly to WordPress hosting, DNS configuration, and server administration.

By the end of this course, you’ll have the confidence to apply these concepts to WordPress hosting, DNS configuration, and basic network diagnostics.

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What Will You Learn?

  • Understand the difference between a hostname and an IP address
  • Explain how DNS translates hostnames into IP addresses
  • Identify when to use a hostname vs. a direct IP address
  • Use basic diagnostic tools like ping and traceroute
  • Troubleshoot common DNS and connectivity issues
  • Apply hostname and IP concepts to WordPress hosting environments

Course Content

Module 1: Foundational Concepts — Defining Digital Identifiers
Introduce hostnames and IP addresses, showing how each functions in web communication.

Module 2: Functionality & Use Cases — IPs and Hostnames in Action
Module Purpose: Show how DNS resolves hostnames to IPs and how both are used in troubleshooting.

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