Hello Yaswanth Tavva,
Thanks for your question.
Yes, These cards are available in NP-series virtual machines.
No, they are not connected directly to the network through their QSFP ports in standard offerings.
See: https://learn.microsoft.com/en-us/azure/virtual-machines/np-series#frequently-asked-questions
For more details on specific deployment options and the latest updates, it is best to check the Azure Marketplace. See: https://azuremarketplace.microsoft.com/en-us/home
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Regards,
Abiola