I would expect they would do the same as other big scalers, and handle most of the networking in dedicated card firmware,
https://learn.microsoft.com/en-us/azure/azure-boost/overview...
https://learn.microsoft.com/en-us/azure/virtual-network/acce...
https://learn.microsoft.com/en-us/azure/azure-boost/overview...
https://learn.microsoft.com/en-us/azure/virtual-network/acce...