Packet Tracer is a cross-platform visual simulation tool designed by Cisco Systems that allows users to create network topologies and imitate modern computer networks. The software allows users to simulate the configuration of Cisco routers and switches using a simulated command line interface. Packet Tracer makes use of a drag and drop user interface, allowing users to add and remove simulated network devices as they see fit. The software is mainly focused towards Certified Cisco Network Associate Academy students as an educational tool for helping them learn fundamental CCNA concepts. Previously students enrolled in a CCNA Academy program could freely download and use the tool free of charge for educational use.Practicals are based on following topics:• Topologies• HTTP(Hyper Text Transfer Protocol)• DNS(Domain Name server)• DHCP(Dynamic Host configuration Protocol)• Gmail• VIOP(Voice over IP)• Subnet• LanSegmant component• RIP(Routing Information Protocol)• OSPF(Open Shortest Path)