Net use is a command-line tool that can be used to map a drive in Windows. Mapping a drive means assigning a drive letter to a network location or a local folder, which allows the user to access it more easily and quickly. Net use can also be used to disconnect a mapped drive, display information about mapped drives, or connect to shared resources on another computer. Gpupdate, hostname, and dir are not command-line tools that can be used to map a drive.

https://partners.comptia.org/docs/default-source/resources/comptia-a-220-1102-exam-objectives-(3-0)

When an employee is unable to access the company portal using a VPN on their personal smartphone, the most likely cause is:
* The smartphone is not enrolled in MDM service:Mobile Device Management (MDM) services often control access to company resources. If the smartphone is not enrolled, it may be blocked from accessing the VPN and, consequently, the company portal.
* The application must be purchased by the company:Unlikely, as most VPN applications are free to download or included in the company's software package.
* The smartphone is not on the latest OS version:While this could cause compatibility issues, it is less likely than the MDM enrollment issue.
* The application fails to install and launch:This would be a different problem and would usually present specific error messages.
Reference:
CompTIA A+ 220-1102 Exam Objectives, Section 2.7: Explain common methods for securing mobile and embedded devices.
MDM configuration and access control documentation.

The technician should use the File Explorer application to assist the user with hiding the file 1. The user can right-click the file and select Properties. In the Properties dialog box, select the Hidden check box, and then click OK 1.

If a technician is unable to run an OS installation file and receives a message indicating no software is installed to handle the file, the next step is to mount the ISO file. Mounting the ISO will create a virtual drive from which the installation can be run, mimicking the behavior of a physical installation media.