It has a limited command set, meaning it is not possible to practice all of the IOS commands that might be required. Thus, Packet Tracer is unsuitable for modelling production networks. The application itself only has a small number of features found within the actual hardware running a current Cisco IOS version. However, due to functional limitations, it is intended by Cisco to be used only as a learning aid, not a replacement for Cisco routers and switches. Packet Tracer is commonly used by NetAcad students, since it is available to them for free. Packet Tracer allows students to design complex and large networks, which is often not feasible with physical hardware, due to costs. Cisco Systems claims that Packet Tracer is useful for network experimentation. Packet Tracer is often used in educational settings as a learning aid. Packet Tracer also allows instructors to create activities that students have to complete. As of Packet Tracer 5.0, Packet Tracer supports a multi-user system that enables multiple users to connect multiple topologies together over a computer network. In addition to simulating certain aspects of computer networks, Packet Tracer can also be used for collaboration. As of version 5.3, Packet Tracer also supports the Border Gateway Protocol. Packet Tracer supports an array of simulated Application Layer protocols, as well as basic routing with RIP, OSPF, EIGRP, BGP, to the extents required by the current CCNA curriculum. A physical connection between devices is represented by a 'cable' item. Packet Tracer allows users to create simulated network topologies by dragging and dropping routers, switches and various other types of network devices. Similar Android and iOS apps are also available. Packet Tracer can be run on Linux, Microsoft Windows, and macOS.

3 PTTP protocol to make Packet Tracer interact with real network devices.

Packet tracer labs company