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10 questions with answer explanations. Choose an answer below to begin.
A technician needs to allow HTTP traffic through a firewall. Which TCP port should be opened?
2.1 Compare and contrast TCP and UDP ports
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A technician needs to allow HTTP traffic through a firewall. Which TCP port should be opened?
21
22
80
443
Correct answer
80
HTTP uses TCP port 80. Port 21 is FTP, port 22 is SSH, and port 443 is HTTPS.
Which memory type is volatile and used for temporary data storage while the computer is on?
SSD
HDD
RAM
ROM
Correct answer
RAM
RAM (Random Access Memory) is volatile; data is lost when power is off. SSDs and HDDs are non-volatile storage, and ROM retains data without power.
A user has a monitor with a DisplayPort input and a computer with only an HDMI output. Which type of adapter is needed?
DisplayPort to HDMI
HDMI to VGA
DVI to HDMI
USB-C to HDMI
Correct answer
DisplayPort to HDMI
A DisplayPort to HDMI adapter connects the HDMI computer to the DisplayPort monitor. The other options either reverse the direction or use incompatible connectors.
A technician is building a PC in a standard mid-tower case. Which power supply form factor is most commonly used?
ATX
SFX
LP4
EPS
Correct answer
ATX
ATX is the standard power supply form factor for most desktop builds. SFX is used in small form factor cases, LP4 is a connector type, and EPS is a CPU power connector standard.
A PC powers on (fans spin, lights on) but the monitor shows no display and no beep codes. What should be checked first?
Replace the power supply
Reseat the RAM modules
Replace the motherboard
Check the monitor cable connection
Correct answer
Reseat the RAM modules
No display with fan activity often indicates a RAM issue. Reseating RAM is a quick and common fix. While a monitor cable could be loose, the lack of beeps suggests the system isn't posting, and RAM is a likely cause.
Which RAID level provides disk mirroring without striping or parity?
RAID 0
RAID 1
RAID 5
RAID 10
Correct answer
RAID 1
RAID 1 creates an exact copy (mirror) of data on two drives. RAID 0 uses striping, RAID 5 uses striping with parity, and RAID 10 combines mirroring and striping.
A laser printer produces pages with vertical black lines in the same position on each page. Which component is most likely defective?
Toner cartridge
Fuser assembly
Drum unit
Transfer roller
Correct answer
Drum unit
Repeating vertical black lines often indicate a scratched or damaged drum. Toner issues cause light prints, a bad fuser causes smearing, and a damaged transfer roller can cause white spots.
Which twisted-pair cable category is commonly used for backbone applications and supports 10 Gbps over distances up to 100 meters?
Cat5e
Cat6
Cat6a
Cat7
Correct answer
Cat6a
Cat6a supports 10 Gbps up to 100 meters. Cat5e supports up to 1 Gbps, Cat6 supports 10 Gbps but only up to 55 meters, and Cat7 is not widely standardized for Ethernet.
A user reports that contacts on their smartphone are no longer syncing with the cloud service. After verifying internet connectivity, what should the technician check next?
The account sync settings are enabled
The device date and time are correct
The battery level is above 20%
Airplane mode is turned off
Correct answer
The account sync settings are enabled
If internet works, the most common cause is that sync is disabled in account settings. Incorrect date/time can affect certificates but is less common; battery level and airplane mode would affect connectivity, which is already verified.
Which tool is specifically designed to prevent electrostatic discharge (ESD) when working inside a computer?
Multimeter
Antistatic wrist strap
Cable tester
Power supply tester
Correct answer
Antistatic wrist strap
An antistatic wrist strap grounds the technician to prevent ESD. A multimeter measures voltage, a cable tester checks network cables, and a power supply tester tests PSU outputs.
Recall the answer before opening each card.
HTTP uses TCP port 80. FTP uses port 21, SSH uses port 22, and HTTPS uses port 443.
RAM (Random Access Memory) is volatile; data is lost when power is off. SSDs and HDDs are non-volatile storage.
A DisplayPort to HDMI adapter. Direction matters: the computer side (HDMI) goes to the adapter's HDMI input, and the adapter's DisplayPort connects to the monitor.
ATX is the standard form factor. SFX is for small cases, LP4 is a connector, and EPS is a CPU power connector standard.
Reseat the RAM modules. Common cause of no POST with fans spinning is loose or faulty RAM. Check each module one at a time.
RAID 1 mirrors data on two drives. RAID 0 stripes, RAID 5 uses parity, and RAID 10 combines mirroring and striping.
A scratched or damaged drum unit. The drum transfers toner to paper; defects cause streaks. Toner issues cause light prints, fuser causes smearing.
Cat6a. Cat5e supports 1 Gbps, Cat6 supports 10 Gbps only up to 55 meters, and Cat7 is not widely standardized for Ethernet.
Account sync settings. Disabled sync is the most common cause after connectivity. Check date/time if certificate issues arise, but sync settings come first.
Antistatic wrist strap. It grounds the technician. Multimeter tests voltage, cable tester checks cables, power supply tester tests PSU outputs.
FTP (File Transfer Protocol) uses port 21 for control. Data transfer may use port 20. This is separate from HTTP or SSH.
Non-volatile. ROM retains data without power, unlike RAM which is volatile and loses data when powered off.
An HDMI to DisplayPort adapter, but note: common scenario is HDMI output to DisplayPort monitor, requiring a DisplayPort to HDMI adapter (active or passive). Direction must match.
SFX is a small form factor power supply used in compact cases. It is smaller than ATX and not suitable for standard mid-tower builds.
Yes, often. No beep codes indicate the system is not POSTing, and RAM is a common culprit. Reseating or replacing RAM can resolve.
Striping without redundancy. Data is split across drives for performance but offers no fault tolerance.
Low toner or a defective toner cartridge. Also, the transfer roller or drum can cause light prints, but vertical lines are more specific to the drum.
1 Gbps at 100 meters. It is suitable for most home networks but not for 10 Gbps applications.
Disabled account sync settings, incorrect date/time (affects certificates), or authentication problems. After confirming internet, sync settings are the next check.
Voltage, current, and resistance. It is used to test power supplies, continuity, and components, but does not prevent ESD.
Read the prompt, commit to an answer, then flip the card. Move through the deck at your own pace and repeat any topic that does not come back quickly.
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Connect the concepts
Open a branch to connect a topic with its practice questions and explanations. Use the map to choose your next review topic.
This is an analysis of the practice bank, not a claim about the vendor's live exam blueprint. Use it to identify the knowledge, judgment, and recall patterns exercised here, then verify your coverage against the current official exam guide.
The practice bank exercises knowledge of TCP/UDP ports and network cable categories. For example, HTTP traffic requires opening TCP port 80, while FTP uses port 21, SSH port 22, and HTTPS port 443. Additionally, twisted-pair cable categories are compared: Cat6a supports 10 Gbps over up to 100 meters, whereas Cat5e handles 1 Gbps, Cat6 only 10 Gbps to 55 meters, and Cat7 lacks widespread Ethernet standardization. These topics fall under objectives 2.1 and 2.2, requiring technicians to select the correct port or cable based on scenario requirements.
Questions 2, 3, and 4 evaluate understanding of volatile vs non-volatile memory, adapter types, and power supply form factors. RAM is volatile and loses data when power is off, unlike SSDs, HDDs, and ROM. For video connectivity, a DisplayPort to HDMI adapter is needed when the computer has HDMI output and the monitor has DisplayPort input. The ATX power supply is standard for mid-tower cases; SFX is for small cases, and LP4 and EPS are connector types. These topics align with objectives 3.1 and 3.2, requiring component identification and compatibility decisions.
This section covers RAID levels and laser printer components. RAID 1 provides disk mirroring without striping or parity, unlike RAID 0 (striping), RAID 5 (striping with parity), and RAID 10 (mirroring and striping). For laser printers, repeating vertical black lines typically indicate a scratched drum unit; toner issues cause light prints, a bad fuser causes smearing, and a damaged transfer roller leads to white spots. These correspond to objectives 3.3 and 3.6, testing ability to configure RAID and identify printer defects.
Questions 5, 9, and 10 address troubleshooting hardware, mobile devices, and ESD safety. With no display but fans spinning, reseating RAM is a quick check since it often prevents POST. For mobile contacts not syncing, after verifying internet connectivity, checking account sync settings is the next logical step; incorrect date/time or airplane mode are less likely. To prevent ESD when working inside a computer, an antistatic wrist strap is the specific tool; other tools like multimeters test voltage or connectivity. These align with objectives 5.2, 4.5, and 4.1, emphasizing systematic troubleshooting and safety.
Study workflow
When a PC powers on but shows no display and no beep codes, power off, unplug, then remove and reinsert RAM modules firmly. Ensure they click into place. Test one module at a time if multiple. This often resolves POST failures caused by loose or improperly seated memory.
For smartphone contacts not syncing to the cloud, first verify internet connectivity (Wi-Fi or cellular data). Then go to Settings > Accounts/Cloud and ensure sync is enabled for contacts. If disabled, toggle it on. Also check for error messages or re-authenticate if needed.
Before opening a computer case, attach the antistatic wrist strap's clip to a grounded metal surface (e.g., case frame) and wrap the band snugly around your wrist. This prevents electrostatic discharge (ESD) damage to sensitive components like RAM, CPU, or motherboard.
If prints show repeating vertical black lines, power off the printer and open the toner/drum access. Remove the toner cartridge and inspect the drum for scratches or defects. Replace the drum unit if damaged, following manufacturer instructions. Test print after replacement.
To connect an HDMI output to a DisplayPort monitor, choose an active or passive HDMI-to-DisplayPort adapter. Ensure the adapter supports the desired resolution and refresh rate. Avoid using a DisplayPort-to-HDMI adapter, which would reverse the signal direction.
FAQ
Clear boundaries on what the bank covers, how to use it, and where official vendor information still matters.
HTTP uses TCP port 80 as a well-known port for web traffic. TCP ensures reliable, ordered delivery of data, which is essential for web pages. Other common ports include 21 (FTP), 22 (SSH), and 443 (HTTPS).
Volatile memory, like RAM, loses data when power is off and is used for temporary storage. Non-volatile memory, like SSDs, HDDs, and ROM, retains data without power. This distinction is critical for data persistence and system operation.
RAID 1 provides disk mirroring, creating an exact copy of data on two drives. It offers redundancy but no striping or parity. RAID 0 uses striping, RAID 5 uses parity, and RAID 10 combines mirroring and striping.
An antistatic wrist strap is the specific tool for ESD prevention. It grounds the technician to dissipate static charge. Other tools like multimeters or cable testers do not prevent ESD.
Repeating vertical black lines often indicate a scratched or damaged drum unit. The drum transfers toner to the paper, so any defect causes streaks. Other components like the fuser or toner cartridge cause different issues.
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