Files using the .pka extension refer to activity files created by the Packet Tracer tool. The Packet Tracer software was developed by Cisco as an interactive network learning system. It helps create network topologies, configure devices, inject packets, and simulate networks visually. A .pka file is a special format for practice activities made by Cisco to be edited and saved only with appropriate software.
To solve .pka file problems, associate the file type with the right application. Update your .pka opening software, since only the latest version supports the current file format. Search the Cisco website for an available Packet Tracer update.
You need to update the application you normally use to open .pka files, as only the latest software version supports the current format. You should also scan the .pka file for viruses using a popular antivirus program.
The .pka extension is mainly given to Packet Tracer Activity Format files. Packet Tracer is a Cisco program that simulates basic computer networks, often for educational purposes. .pka files store data on network design and configuration from Packet Tracer practice sessions. The files are meant to be edited and saved only with Packet Tracer software.
Usually you can easily open .pka files by installing the correct software with File->Open support. Read this guide to open your .pka file now!
Cisco Packet Tracer