IPv4 Addressing & Subnetting

Whether you are preparing for the Cisco CCNA certification or simply want to refresh your understanding of IPv4 addressing and subnetting, this course provides a clear and structured learning path. It is designed to help learners build confidence in one of the most important foundations of networking. The course begins with a look at the early history of ARPANET and explains why TCP/IP was originally developed. This background helps learners understand how modern IP networking evolved and why addressing became such an important part of network communication. From there, the course explains the development of IP addressing, starting from the early method where only the first byte was treated as the network portion. Learners will then move into classful addressing, subnetting, Variable Length Subnet Masking, commonly known as VLSM, and Classless Inter-Domain Routing, also known as CIDR. The training also covers IPv4 route summarization and supernetting, helping learners understand how networks can be grouped, simplified, and represented more efficiently in routing tables. As an added benefit, the course includes multiple quiz slides with answers. These quizzes allow learners to pause the videos, test their understanding, and then check their responses before moving forward. By the end of this course, learners will have a stronger understanding of IPv4 addressing, subnetting, summarization, and the key concepts needed for CCNA preparation and real-world networking.