Packet Tracer 5.2
Packet Tracer version 5.2 is a new minor release containing new and additional features not available in Packet Tracer version 5.1. CCNA Security program requires the use of Packet Tracer 5.2. There is no program requirements that make it necessary to upgrade to version 5.2 for CCNA Discovery and CCNA Exploration, you can upgrade to the new version to take advantage of enhancements and new features in this version.
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