Subnet Machine
Free subnetting practice test
The never ending subnetting quiz. Test your knowledge of subnetting, masks, IP addresses, CIDRs and more.
Start the Subnet Machine What is the Subnet Machine?
The Subnet Machine is a never-ending quiz designed to assist students and professionals in learning and practicing subnetting, a crucial skill in networking.
Subnetting involves dividing a network into smaller, manageable sub-networks (subnets) to improve performance, security, and efficiency in IP network management.
The tool provides a user-friendly interface for practicing subnet calculations, offering various exercises and scenarios to enhance understanding of IP addressing and subnetting concepts. The Subnet Machine is particularly useful for those preparing for networking certifications like Cisco's CCNA or CompTIA's Network+, as subnetting is a fundamental topic covered in these exams.
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