Are credentials required during agent mode scan

Are credentials required during agent mode scan

We are thinking to purchase service desk and we have some questions before we buy it and test the system

The question is on Agent mode scan of the assets. We manually downloaded ManageEngineAssetExplorerAgent.msi agent and manually installed on the client stations and enabled agent mode in SD.

Now we are not able to understand how to scan those clients and are any credentials required to scan them.

As I read one of benefits are that only one port 9000 is required during the scan and nothing else.

Which scan should be initiated, Domain, Network or ?

Thank you

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