The su (substitute user) command is used in Linux to switch to another user account, most commonly to escalate privileges by switching to the root (administrator) account. It allows administrative tasks to be performed in a terminal session.
A). runas is a Windows command for executing a program under another user ' s context.
B). cmcl is not a valid Linux or administrative command.
C). net user is a Windows command for managing local user accounts.
Reference:
CompTIA A+ 220-1102 Objective 1.9: Identify common features and tools of the Linux client/desktop OS.
Study Guide Section: Linux command-line tools - su, sudo

Explanation:
Issue: Limited network connectivity
Resolution: Refresh DHCP
Verify/Resolve: ipconfig
Issue (drop-down)
Limited network connectivity
Why this matches:
"Internet Down" most commonly indicates the workstation has lost valid Layer 3 connectivity (bad/expired DHCP lease, APIPA address, wrong gateway, etc.). In CompTIA A+ terms, this aligns best with limited connectivity symptoms (can't reach internet resources).
Resolution (drop-down)
Refresh DHCP
Why this is the most efficient fix:
If the client has:
an expired lease
an APIPA address (169.254.x.x) because DHCP failed
an incorrect IP/gateway from a bad lease
...then the fastest first remediation is to renew DHCP to obtain a correct IP address, default gateway, and DNS servers. This is a standard CompTIA A+ troubleshooting action (quick, low-risk, high-success).
Verify/Resolve (drop-down)
ipconfig
Why this is the correct verification tool:
ipconfig is the primary Windows CLI tool to:
check current IP settings (ipconfig /all)
release/renew DHCP (ipconfig /release and ipconfig /renew)
confirm you received a valid IP + gateway + DNS, which is required for internet access.
What you would do (mapped to those choices)
Using ipconfig to complete "Refresh DHCP" and confirm the fix:
Check current addressing
ipconfig /all
Look for:
Valid IPv4 (not 169.254.x.x)
Valid Default Gateway
DNS servers present
Refresh the DHCP lease
ipconfig /release
ipconfig /renew
Verify outcome
Run ipconfig again to confirm:
You now have a correct IP for the network
Default gateway is populated
If the gateway/DNS populate correctly, internet access typically returns.

The recurring print issue suggests theprint spooler service is not set to start automatically, causing it to stop between sessions. Ensuring it is set tostart automaticallyand manuallystarting the servicewill resolve the issue.
FromMark Soper - Mike Meyers ' Lab Manual:
"The print spooler is essential for print services. If it isn't configured to start automatically, users may experience recurring failures."
"Manually starting the service or setting it to ' Automatic ' in the Services panel resolves persistent print availability problems."

If the system fails to boot after removing the USB installation media, it often means the BIOS is not pointing to the correct boot device. This typically involves an issue with the BIOS settings-such as UEFI being disabled when the OS was installed in UEFI mode.
FromAll-in-One Exam Guideby Travis Everett:
"One of the most common post-installation issues is failing to configure the boot mode correctly in BIOS. If an OS is installed in UEFI mode, the UEFI boot must be enabled, otherwise the system won't detect the bootloader."

Apps like GPS or roaming services often drain battery during travel.Checking app utilizationhelps identify battery drain sources.
FromQUENTIN DOCTER - COMPTIA A+ COMPLETE study GUIDE:
"Monitoring app activity can reveal high-power usage apps running in the background, especially when mobile data or GPS is active."