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  1. How to troubleshoot AirDrop connections

  2. How to troubleshoot HomeKit connections

  3. How to force your iPhone to restart

  4. What to do if your iPhone won't charge

  5. How to put your iPhone into DFU mode

  6. How to restart or reboot your iPhone

  7. What if iOS 12 freezes or stops responding?

  8.  What is “Bootloader”?

  9.  What is RIS and why you use RIS?

  10.  What is SMTP server or POP server?

  11.   What is reservation?_

  12.  What is BSOD? How do you troubleshoot it?

  13.  Explain the term SID?

  14.  Explain the term FIXMBR?

  15.  What is SCSI?

  16.  What is packet?

  17.  What is B Router?