Cisco Packet Tracer is a network simulation tool developed by Cisco Systems. It allows users to create, configure, and troubleshoot virtual networks without the need for physical hardware. This software is widely used in educational settings to help students learn about networking concepts and practice their skills in a safe environment. The tool features a user-friendly interface that supports drag-and-drop functionality, making it accessible for beginners. Users can simulate various network devices, such as routers and switches, and visualize how data flows through a network. Cisco Packet Tracer is an essential resource for those pursuing networking certifications like CCNA.