The query for a seeks a legally no-cost, digitally signed, ready-to-deploy virtual appliance. Conclusion: No such publicly available resource exists from Cisco Systems. All official OVA files require a valid Cisco Smart Account, an active support contract for the CSR 1000v product, or a time-limited evaluation entitlement. "Free verified" downloads found on third-party torrent or file-sharing sites are unverifiable, often tampered with, and pose severe security risks.

: Assign at least 4 GB of RAM and 8 GB of disk space for stable performance.

: Choose a hardware profile (Small, Medium, or Large) based on your lab needs. "Small" is typically sufficient for basic CLI practice.