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Subnetting is a fundamental skill for network administrators and IT professionals. It involves dividing a larger network into smaller subnetworks, allowing for more efficient management and allocation of IP addresses. Understanding subnetting is crucial for designing, configuring, and troubleshooting complex networks. If you are looking to enhance your subnetting knowledge, there are numerous online courses and certifications available. In this article, we will explore the ten best subnetting courses and certifications online, helping you choose the right one for your professional development.

1. Cisco Certified Network Associate (CCNA)

Undoubtedly one of the most recognized certifications in the networking industry, the CCNA covers a broad range of networking topics, including subnetting. Cisco offers comprehensive training materials and online courses to help candidates prepare for the CCNA exam. By obtaining this certification, you will gain a solid foundation in subnetting and other networking concepts.

2. Udemy: Subnetting Made Simple

If you prefer a more self-paced learning experience, Udemy offers a course called “Subnetting Made Simple.” This course breaks down subnetting into easy-to-understand modules, allowing you to grasp the concept quickly. The instructor provides real-world examples and practical exercises to reinforce your understanding of subnetting.

3. CompTIA Network+

The CompTIA Network+ certification validates the essential networking skills required for entry-level IT professionals. This certification covers subnetting and other networking fundamentals. CompTIA provides study materials, practice exams, and online courses to help you prepare for the Network+ certification exam.

4. Pluralsight: Networking Fundamentals: Subnetting

Pluralsight offers a comprehensive course called “Networking Fundamentals: Subnetting.” This course provides in-depth explanations of subnetting concepts and practical examples. You will learn how to calculate subnets, assign IP addresses, and troubleshoot subnetting issues. This course is suitable for beginners as well as those who want to further strengthen their subnetting skills.

5. International Council of E-Commerce Consultants (EC-Council): Certified Network Defender (CND)

The EC-Council’s Certified Network Defender (CND) certification focuses on network security and defense, with subnetting being a crucial component of network protection. The CND certification covers topics such as IP addressing, subnetting, and network segmentation. By acquiring this certification, you will not only strengthen your subnetting skills but also gain valuable insights into network defense strategies.

6. LinkedIn Learning: Networking Foundations: IP Addressing

LinkedIn Learning offers a course named “Networking Foundations: IP Addressing,” which provides a holistic understanding of IP addressing, including subnetting. This course explains the concepts of Classful IP addressing, IP subnetting, and Variable Length Subnet Masking (VLSM). By completing this course, you will have a firm grasp on subnetting and its role in network design.

7. Microsoft Technology Associate (MTA): Networking Fundamentals

The Microsoft Technology Associate (MTA) certification is an entry-level certification designed to validate foundational IT knowledge. The “Networking Fundamentals” module covers basic networking concepts, including subnetting. Microsoft offers study resources and online courses to help you prepare for the MTA Networking Fundamentals exam.

8. Cybrary: Subnetting

Cybrary offers a free online course dedicated entirely to subnetting. This course covers the fundamentals of subnetting and gradually progresses to more advanced concepts. You will gain hands-on experience with subnetting exercises and quizzes, ensuring a comprehensive understanding of subnetting principles.

9. Coursera: TCP/IP and Advanced Topics

Coursera hosts a course called “TCP/IP and Advanced Topics,” which delves into various aspects of TCP/IP networking. Subnetting is among the topics covered in the course, providing you with a solid understanding of how subnetting fits into the larger networking picture. Coursera’s courses are created by top universities and industry experts, ensuring high-quality content.

10. Global Knowledge: Introduction to Subnetting

Global Knowledge offers a course called “Introduction to Subnetting,” which is specifically designed for beginners. This course covers the basics of subnetting, such as calculating subnet ranges and understanding subnet masks. The instructor provides step-by-step guidance and real-world examples, making it easy for beginners to grasp the core concepts of subnetting.


Enhancing your subnetting skills and knowledge is essential for anyone working in the field of networking. The above-mentioned courses and certifications provide a range of options to suit different learning preferences and skill levels. Whether you choose a vendor-specific certification like CCNA or opt for online courses from platforms like Udemy and Pluralsight, each resource offers valuable insights and practical exercises to help you master subnetting. By investing in your subnetting expertise, you will unlock new possibilities and become a more proficient network administrator or IT professional.