Question

a smart phone is always a ______.
○ client
○ network
○ process
○ server

Explanation:

A smartphone requests and consumes services from servers (like app servers, cloud services) and does not function as a core network, a running process, or a server (which provides services to others) by default. A client is a device that accesses remote services, which matches a smartphone's primary role.

Answer:

client