Tag: classful network address ranges

Classful vs. Classless IP Addressing
CCNA April 19, 2025

Classful vs. Classless IP Addressing: A Deep Dive into Networking Evolution

IP addressing is the backbone of modern networking, enabling devices to communicate across local networks and the internet. Every device—whether a smartphone, server, or IoT sensor—requires a unique IP address to send and receive data. However, the original IP addressing system (classful addressing) struggled to scale with the internet’s explosive growth. This led to inefficiencies […]
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CCNA August 27, 2019

IPv4 Classful Network Exclusive Explanation

A classful network is a network addressing architecture used in networks since 1981. RFCs 790 and 791, released in 1981, describe how IPv4 network addresses were primarily allocated based on a classification system. The authors of IPv4 addresses set up three classes of network addresses: class A, B, and C for different network sizes. Classful […]
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