The CCNA exam removed Frame Relay years ago, but many advanced networking textbooks still have Frame Relay troubleshooting labs. Version 6.3 supports it perfectly; newer versions have deprecated it.
Released around 2016, version 6.3 was primarily a stability update. Its main distinction from 6.2 was the introduction of mandatory NetAcad login for a full experience, though guest access with a short wait time remained possible. Cisco Packet Tracer 6.3 Free Download
Practice configurations without fear of damaging real physical hardware. Buggy Protocols: The CCNA exam removed Frame Relay years ago,