Explanation
Box 1: Yes
By moving much of Azure's software-defined networking stack off the CPUs and into FPGA-based SmartNICs, compute cycles are reclaimed by end user applications, putting less load on the VM, decreasing jitter and inconsistency in latency.
Box 2: Yes
Box 3: No
Accelerated Networking (AN) is generally available (GA) and widely available for Windows and the latest distributions of Linux References:
https://azure.microsoft.com/en-us/blog/maximize-your-vm-s-performance-with-accelerated-networking-now-gen
https://azure.microsoft.com/en-gb/blog/maximize-your-vm-s-performance-with-accelerated-networking-now-gen

Explanation

Box 1: Yes
To configure Azure AD single sign-on with SAP HANA, perform the following steps:
1. In the Azure portal, on the SAP HANA application integration page, select Single sign-on.
2. On the Select a Single sign-on method dialog, select SAML/WS-Fed mode to enable single sign-on.

Box 2: No
Box 3: No
Key security considerations for deploying SAP on Azure
References:
https://docs.microsoft.com/en-us/azure/active-directory/saas-apps/saphana-tutorial
https://docs.microsoft.com/en-us/azure/active-directory/saas-apps/saphana-tutorial

1 - Add SAP Netweaver for the Azure AD application gallery.
2 - Implement Active Directory Federation Services
3 - Add SAP Cloud Platform Identity from the Azure application gallery.
4 - Configuration SAML single sign-on (SSO).

To reference a credential stored in Azure Key Vault, you need to:
1. Retrieve data factory managed identity
2. Grant the managed identity access to your Azure Key Vault
3. Create a linked service pointing to your Azure Key Vault.
4. Create data store linked service, inside which reference the corresponding secret stored in key vault.
Reference:
https://docs.microsoft.com/bs-latn-ba/azure/data-factory/store-credentials-in-key-vault