Final answer:
In order to ensure domain users connect to DB1 using their credentials, they should Create a Service Principal Name (SPN) for User1, and Configure the delegation settings of User1.So the correct option is B and C.
Step-by-step explanation:
To facilitate domain users connecting to DB1 with their credentials, two actions are required:
B. Create a Service Principal Name (SPN) for User1: Generate an SPN for User1 associated with the service it represents, ensuring proper authentication delegation.
E. Configure the delegation settings of Server1 and Server2:
Enable constrained delegation on Server1 and Server2 for User1, permitting these servers to impersonate the user when connecting to DB1.
By creating the SPN for User1, you establish its identity for the service it represents.
Then, configuring constrained delegation on Server1 and Server2 allows these servers in the NLB cluster to impersonate users and forward their credentials to DB1.
This setup enables seamless user authentication for accessing the DB through Web1, enhancing security and user experience within the network infrastructure.
So these are the correct options.(Band C)