For backing up pictures, music, and videos from a mobile device, what should be used so that these files synchronize across devices?
a cloud service
a device's sim card
a network service
an external hard drive

What is domain name system (dns)? allows dynamic ip address allocation so users do not have to have a preconfigured ip address to use the network converts ip addresses into domains, or identifying labels that use a variety of recognizable naming conventions the efficient coexistence of telephone, video, and data communication within a single network, offering convenience and flexibility not possible with separate infrastructures the integration of communication channels into a single service