[Koha] Does Koha support barcode scanners and more questions?

Dear Community Support Team, I am very new and glad that such software exists and great people supporting it. I have following questions 1) Could this software be installed in a webspace and used or should this be in a standalone (local) computer ? 2) Could any barcode scanners be integrated with this software, to update whether it is loaned or returned or any specific way to scan the books ? 3) Is it possible to use a mobile camera to scan and update the software about the books? Thanks and looking forward to knowing the answers. regards, Karthick