Many network engineers and students host their entire CCNA lab portfolios on GitHub. Search for terms like "CCNA Packet Tracer Labs" to find community-vetted topologies.
Not all PKT files are created equal. Here are the most reliable places to find high-quality labs:
High-quality .pkt repositories generally categorize their example files by technology or certification blueprint. Here are the core scenarios you should seek out: Basic Switching & Routing cisco packet tracer example files pkt
If you are searching for files today, look for these specific topologies to cover the core CCNA curriculum:
Ethernet, fiber, serial, and wireless connections. Many network engineers and students host their entire
courses. They include a "grading" feature and instructions that pop up when the file is opened. .pkz (Packet Tracer Compressed File)
You might be modifying configurations that are outside the scope of the Activity Wizard's grading criteria. Here are the most reliable places to find
: Most practice .pkt and .pka files match Cisco Certified Network Associate (CCNA) and Cisco Certified Support Technician (CCST) exam blueprints.
: The standard save file. It contains the entire network topology and its configurations exactly as they were when saved.