Downloading Cisco IOS/NX-OS from unofficial sites is risky (malware, backdoors) and violates Cisco’s licensing. Always use official sources.
The nxos.7.0.3.I7.9.bin file is a system image for Cisco Nexus 3000/9000 switches designed for enhanced stability and security within the 7.0(3)I7 release train. Authentic, secure downloads of this proprietary software require an active Cisco service contract via the official Cisco Software Central portal. For the secure download, visit Cisco Software Central. nxos703i79bin download link