A student, doing a summer semester of study overseas, has taken hundreds of pictures on a smartphone and wants to back them up in case of loss. What service or technology would support this requirement?

To back up hundreds of pictures from a smartphone, the most appropriate service would be cloud services. These services allow users to store and back up their data on remote servers accessed via the internet, providing a convenient and secure way to ensure data is not lost if something happens to the physical device. Popular cloud services for photo backup include Google Photos, iCloud for Apple devices, Amazon Photos, Dropbox, and Microsoft OneDrive. These services often offer automatic syncing, so photos taken on the smartphone would be backed up without requiring manual intervention.