What is the purpose of the Port value selected for a specific solution during the Receiver Port configuration in global setup xxx?

What is the maximum number of fields that can be concatenated using the custom mapping?

In SAP Ariba Cloud integration Gateway solutions some of the documents were changed from Idoc type (in CI solution) to pxxy type?
Which of the following documents are affected by this change?
Note: There are 3 correct answers to this question.

What value must you define in the Domain Name field while creating a project connection?

You are setting up a connection for direct connectivity via Cloud Connector. Which Transport Type should you select to configure a connection?