What is a dev space in SAP Business Application Studio?

How can you verify in SAP Business Application Studio that a connection to an external system works?

In a cloud connector system mapping, what's the difference between the internal host and the virtual host?

What happens to SAP Business Application Studio dev spaces that aren't used for a while?

What state must a dev space be in to download its contents, and why would you download it?

What is SAP Business Application Studio?

What does the "Host in Request Header" setting control in a cloud connector system mapping?