Syllabus

Subnetting Interactive Lessons

1IPv4Learn how IPv4 addresses, prefixes, scopes, and Linux interface output fit together.
2SubnetsLearn how prefixes define IPv4 subnets and influence on-link delivery, routing, and policy.
3Subnet MathLearn how to calculate IPv4 network, broadcast, range, and address counts from a prefix.
4Subnetting CheatsLearn compact binary and block-size methods for checking IPv4 subnet calculations.
5CIDRLearn how CIDR prefixes represent address ranges, subnet boundaries, and aggregated routes.
6NATLearn how source, destination, and port translation modify IPv4 flows and connection state.
7IPv6Learn how to read IPv6 addresses, prefixes, scopes, autoconfiguration, and Linux routing state.

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Before you begin

Frequently Asked Questions

What calculations will I learn?

You will learn how addresses, prefix lengths, subnet masks, and host ranges relate, with subnet arithmetic and a practical reference lesson.

Does the course cover both IPv4 and IPv6?

Yes. Separate lessons introduce IPv4 and IPv6, while the subnet and CIDR concepts help you reason about address allocation.

Should I understand binary numbers first?

Basic binary familiarity is helpful, but the subnet math lessons are designed to build the connection between bits, prefixes, masks, and address ranges.

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