Which of the following technical controls helps to prevent Smartphones from connecting to a corporate network?

Application whitelisting controls which applications can run on a device but does not directly prevent a device from connecting to a network.

Remote wiping erases data from a lost or stolen device after the fact; it does not prevent devices from initially connecting to the network.

An acceptable use policy is an administrative/policy control, not a technical control, and cannot technically enforce network access restrictions.

MDM solutions allow administrators to define and enforce policies that control which devices are permitted to connect to corporate resources, including network access control integration. Through certificate-based enrollment and compliance policies, MDM can block non-enrolled or non-compliant smartphones from joining the corporate network. It is the primary technical control purpose-built for managing and restricting mobile device access.