Trouble
Shooting
Steps
A+
Core
Concepts
Cable
&
Ports
Power
&
Cooling
Storage
&
RAID
100

What is Identify the problem?

The first step in the CompTIA troubleshooting methodology, right after considering corporate policies and procedures.

100

What is Direct Support or Hands-on Repairs?


The term for an A+ Specialist performing hands-on repairs or maintenance for users.

100

What has 15 pins?

SATA power connector.

100

What is a Watt (W) or Wattage rating?

The unit of measure for a Power Supply Unit's (PSU) output capability.

100

What is RAID 0 (Striping without Parity)?

This RAID level stripes data across at least two disks but offers no redundancy.

200

What is Gathering information/asking questions (or Identify the problem)?

The phase where you ask about exact error messages or how long the problem has been occurring.

200

What is x64 (or x86-64)?

The minimum CPU architecture required for modern 64-bit operating systems.

200

What is Serial Attached SCSI (SAS)?

The interface used for high-performance storage devices often found in enterprise server environments.


200

What is a Modular Power Supply?

The name for a PSU that allows you to attach only the necessary power cables, which reduces chassis clutter.

200

What has three drives?

RAID 5 array.

300

What is a Teaching moment?

The process used to correct a user misconception or show them how to properly use equipment.

300

What is Structured Cabling (or a Permanent Link)?

The standard Ethernet cabling run from the wall port through the patch panel.

300

What is Category 6 (Cat6) or Cat6a?

The copper twisted pair cable standard rated to support network speeds of up to 10 Gbps.

300

What is Liquid Cooling (or a Liquid Cooling System)?

A cooling technology that pumps water around the chassis and provides more effective cooling than air convection.

300

What is wear leveling?

The technique utilized by drive firmware and operating systems to evenly distribute writing across all blocks to extend the SSD's lifespan.

400

What is Document findings/lessons learned (and implementing preventive measures)?

The necessary action after successfully resolving an issue and verifying full system functionality.

400

What is the +12 VDC Rail?

The most important electrical rail (voltage) for modern computer systems due to its heavy usage.

400

What is an Active Adapter Cable?

The cable type that has connectors for two different cable types and uses internal circuitry to convert signals, such as digital to analog.


400

What is 80 PLUS Gold?

This efficiency rating requires a PSU to be at least 87% efficient at 20% load, 90% at 50% load, and 87% at 100% load.

400

What is M.2 2280?

The form factor label for an M.2 SSD that is 22mm wide and 80mm long.

500

What is Substituting with a known good (or Testing the theory)?

The diagnostic method used to confirm a theory by substituting a suspected faulty item with a known working item.

500

What is a Private IP Address (or RFC 1918 Address)?

The type of address, defined by RFC 1918, that is not routable over the public internet.

500

What is the Lightning connector?

The proprietary connector used by older Apple iPhone and iPad models for wired peripherals and charging.

500

What is a Redundant Power Supply?

The term for two PSUs installed in a server environment, where one takes over immediately if the other fails.

500

What is Master Boot Record (MBR)?

The partitioning scheme that limits a storage drive to only four primary partitions.