GNS3 (Graphical Network Simulator-3) is a widely adopted open-source network emulation tool that enables users to design, configure, test, and troubleshoot network topologies in a virtual environment. Unlike basic simulators, GNS3 allows for the use of real IOS and firewall images, giving users an experience that closely mirrors working with physical hardware. It supports integration with virtual machines (such as the GNS3 VM), Docker containers, and tools like Wireshark for deep packet inspection. This makes GNS3 a valuable resource in both educational and professional contexts. In academic environments, it is used to enhance the learning of networking concepts and to prepare students for industry certifications like Cisco’s CCNA, CCNP, and CCIE. For professionals and network engineers, GNS3 offers a safe and flexible platform to test network configurations, simulate enterprise networks, or develop cybersecurity labs. Despite its advantages, GNS3 does come with challenges, incl...
Whether it's streaming a movie, sending an email, or running a global business, networks make it all possible. My networking journey began with a desire to understand how technology truly connects us, and it’s become a major part of my IT path. Through hands-on coursework and certifications like those offered by CompTIA, I've built a solid foundation in network architecture, protocols, and cybersecurity. In this post, I’ll walk you through what I’ve learned and where I’m headed next. Laying the Foundation: Introduction to Networking The Introduction to Networking course was my first step. This course gave me the essential building blocks needed to understand how data moves between computers, servers, and devices. I explored: The OSI and TCP/IP models IP addressing, subnetting, and MAC addresses Switches, routers, hubs, and access points LANs, WANs, and network topologies Caption: "The OSI model: breaking down how data flows layer by layer." This...