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Hardware

445 questions

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Question 201Question →

A bench technician is performing scheduled preventive maintenance and calibration on a Fused Deposition Modeling (FDM) 3D printer that has begun exhibiting poor first-layer adhesion and inconsistent filament extrusion. Which TWO of the following maintenance actions should the technician perform to resolve these issues? (Select TWO.)

Select all that apply

Show answer & explanation

Answer: Level the build plate and calibrate the Z-axis offset; Clean the heated print bed surface and clear residue from the extruder nozzle

Answer

The correct maintenance actions are leveling the build plate while calibrating the Z-axis offset, and cleaning the heated print bed surface while clearing residue from the extruder nozzle.
For Fused Deposition Modeling (FDM) 3D printers, first-layer adhesion issues are primarily caused by an unlevel build plate or incorrect Z-axis offset gap between the nozzle and the bed. Inconsistent extrusion is typically caused by partial nozzle clogs or buildup on the extruder tip. Therefore, leveling the build plate, calibrating Z-axis offset, cleaning the print bed surface, and clearing nozzle residue are the correct maintenance actions.

Step-by-Step Solution

1
Analyze the symptoms described in the scenario
The FDM printer experiences poor first-layer adhesion and inconsistent filament extrusion.
Identifying the printer technology (FDM) and failure symptoms points directly to bed distance and hot-end/nozzle delivery mechanisms.
2
Identify correct maintenance steps for FDM adhesion and extrusion
Leveling the print bed and adjusting the Z-axis offset establishes the correct distance between the nozzle and bed. Cleaning the print bed removes oils that prevent adhesion, and unclogging/cleaning the nozzle restores consistent filament output.
These steps address both first-layer bonding and mechanical extrusion pathway obstructions.
3
Differentiate FDM components from SLA and laser printer components
Resin vats belong to SLA printers, while fusers and charge rollers belong to laser printers.
CompTIA A+ requires distinguishing consumables and maintenance parts across different printer technologies.

Key Concept

FDM 3D Printer Maintenance and Consumables Troubleshooting
Question 202Question →

A desktop computer powers on when the power button is pressed, but the fans spin continuously at maximum speed, no video signal is sent to the display, and the system fails to complete the Power-On Self-Test (POST). Upon inspecting the motherboard, a technician notices that while the 24-pin main ATX power cable is securely attached, an 8-pin header located near the CPU socket remains unpopulated. Which of the following power supply connectors should the technician plug into this motherboard header?

Show answer & explanation

Answer: EPS12V 8-pin (4+4 pin) power connector

Answer

EPS12V 8-pin (4+4 pin) power connector
The EPS12V 8-pin connector (frequently split into a 4+4 pin configuration for backward compatibility) is specifically designed to provide dedicated +12V power to the motherboard's CPU power delivery circuits located adjacent to the CPU socket.

Step-by-Step Solution

1
Identify the unpopulated motherboard connector location and its function
The unpopulated 8-pin header near the CPU socket is responsible for supplying dedicated auxiliary 12V power to the processor.
Modern CPUs draw substantial power that cannot be supplied safely through the primary 24-pin ATX main power connector alone.
2
Match the correct power supply unit (PSU) cable to the motherboard CPU power header
The EPS12V 8-pin (or 4+4-pin split) cable matches the keying and voltage layout of the socket.
EPS12V connectors deliver ground and +12V power to the processor's power delivery phase components.

Key Concept

Motherboard Power Connectors and CPU Auxiliary Power
Question 203Question →

An IT support technician is troubleshooting a departmental laser printer that suddenly produces completely solid black pages on every print job. Inspecting the printed output shows that toner covers the paper from edge to edge uniformly. Which of the following components is most likely failing or disconnected to cause this specific symptom?

Show answer & explanation

Answer: Primary charge roller

Answer

The primary charge roller is most likely failing or disconnected, preventing the drum from receiving a uniform negative charge.
During the conditioning phase of the electrophotographic (EP) printing process, the primary charge roller (PCR) conditions the photosensitive drum with a high uniform negative charge (typically around -600V). In standard write-black laser systems, toner carries a negative charge and is repelled by charged drum areas while adhering to discharged areas exposed by the laser. If the primary charge roller loses power or fails, the drum receives no negative charge, causing the negatively charged toner to stick to the entire drum surface, resulting in solid black pages.

Step-by-Step Solution

1
Analyze the reported defect symptom.
The printer produces edge-to-edge solid black output on every sheet.
Understanding the image defect identifies which electrophotographic printing step is malfunctioning.
2
Evaluate drum charging dynamics in electrophotographic printing.
In EP printing, toner is negatively charged and attracted to discharged (less negative) areas of the drum created by the laser. If the primary charge roller fails, the drum receives no negative charge, making the entire drum surface attractive to toner.
Determining why toner is adhering to the entire drum surface pinpoints the conditioning stage component.
3
Conclude the root cause based on component roles.
A faulty primary charge roller (or primary corona) directly leads to solid black pages.
Eliminates other components that cause blank pages, smudging, or light prints.

Key Concept

Electrophotographic (EP) Laser Printing Conditioning Stage and Drum Charging
Question 204Question →

A technician is preparing to replace a motherboard in a mid-tower workstation chassis. The upgrade requires maintaining physical compatibility with the existing computer case while supporting standard desktop power supply delivery and expansion requirements. Which TWO of the following motherboard specification details should the technician verify before purchasing the replacement board?

Select all that apply

Show answer & explanation

Answer: Standard ATX form factor dimensions (12×9.6 inches12 \times 9.6\text{ inches}) and mounting hole patterns compatible with the chassis standoffs; 24-pin main ATX power connector and 8-pin EPS12V auxiliary CPU power socket presence for power supply cable connectivity

Answer

The technician must verify standard ATX form factor dimensions (12×9.6 inches12 \times 9.6\text{ inches}) with compatible mounting hole patterns and confirm the motherboard features both a 24-pin main ATX power connector and an 8-pin EPS12V auxiliary CPU power socket.
The standard ATX form factor uses a 12×9.6 inches12 \times 9.6\text{ inches} board layout with fixed standoff mounting locations that fit mid-tower chassis. Additionally, a desktop system requires both the primary 24-pin ATX power header for board logic and an 8-pin EPS12V connector for dedicated processor power delivery.

Step-by-Step Solution

1
Evaluate chassis form factor and mounting requirements
Confirm standard ATX measurements (12×9.6 inches12 \times 9.6\text{ inches}) align with mid-tower case screw standoffs
Motherboards must physically fit inside the enclosure and align with predefined mounting standoffs to prevent short circuits.
2
Identify power connection standards required for full motherboard powering
Require a 24-pin main power connection and an 8-pin EPS12V CPU power connection
Modern desktop motherboards derive main system power via a 24-pin connector while utilizing an 8-pin EPS12V cable for processor voltage delivery.

Key Concept

Motherboard Form Factors and Power Connectors
Estimated Time:1m 30s
Question 205Question →

A technician installs a new PCIe x4 M.2 solid-state drive into a motherboard's primary M.2 slot. Upon booting the system, the technician notices that the new M.2 SSD is functioning correctly, but two SATA hard drives previously connected to motherboard ports SATA5 and SATA6 are no longer detected by the BIOS/UEFI. The technician verifies that all power and data cables are securely attached. Which of the following best explains why the two SATA drives are no longer recognized?

Show answer & explanation

Answer: The motherboard shares bus bandwidth between the M.2 slot and specific SATA ports, automatically disabling those SATA ports when an M.2 drive is populated.

Answer

The motherboard shares bus bandwidth between the M.2 slot and specific onboard SATA ports, automatically disabling those SATA ports when the M.2 slot is populated.
On many desktop motherboards, internal bandwidth limitations dictate that certain expansion interfaces share controller lanes. When an M.2 SSD is installed into a slot that shares bandwidth with onboard SATA ports, the motherboard automatically disables those specific SATA ports (in this case, SATA5 and SATA6). Moving the SATA drives to unaffected ports restores their connectivity.

Step-by-Step Solution

1
Analyze the reported hardware symptom following the component installation.
The new M.2 SSD operates normally, but specific SATA ports (SATA5 and SATA6) suddenly stop detecting drives despite secure physical cabling.
Determining why functional hardware loses connection specifically after adding an M.2 device.
2
Evaluate motherboard system architecture regarding lane routing and bandwidth sharing.
On modern motherboards, high-speed M.2 slots share PCIe or SATA controller lanes with designated onboard SATA ports.
When an M.2 device is detected in a shared slot, motherboard multiplexers disable the corresponding SATA ports to allocate bandwidth to the M.2 drive.
3
Identify the correct resolution for the technician.
The technician should relocate the SATA data cables from ports SATA5 and SATA6 to unshared SATA ports (such as SATA1 through SATA4).
This resolves the detection issue without removing the M.2 drive.

Key Concept

Motherboard Lane Sharing and M.2/SATA Bandwidth Multiplexing
Question 206Question →

A technician is inventorying motherboard connections while assembling a custom computer system. Match each motherboard internal connector or header to its correct functional description.

Click a left item, then click its matching right item

Items

24-pin ATX Main Connector
8-pin EPS12V Connector
USB 3.2 Gen 2 (Type-E) Header
Front Panel System Header

Matches

Show answer & explanation

Answer

The 24-pin ATX Main Connector matches with delivering primary multi-rail DC power (+3.3V, +5V, +12V) to motherboard logic circuits. The 8-pin EPS12V Connector matches with supplying dedicated +12V power directly to the CPU VRM. The USB 3.2 Gen 2 (Type-E) Header matches with connecting chassis front-panel USB Type-C ports up to 10 Gbps. The Front Panel System Header matches with connecting chassis wiring for switches and LEDs.
Each motherboard internal connector has a specific role: the 24-pin ATX connector delivers main power to motherboard components; the 8-pin EPS12V connector delivers dedicated +12V power to the CPU; the USB 3.2 Gen 2 Type-E header drives chassis USB-C front ports; and the front panel system header links chassis switches and activity LEDs.

Step-by-Step Solution

1
Distinguish between main motherboard power and CPU-specific power connectors.
The 24-pin ATX connector supplies overall motherboard logic and bus power (+3.3V, +5V, +12V), while the 8-pin EPS12V supplies dedicated +12V power for the CPU VRM.
Modern CPUs consume substantial power requiring dedicated +12V power leads separate from main motherboard traces.
2
Identify high-speed internal peripheral data headers versus chassis control pin blocks.
The USB 3.2 Gen 2 Type-E header provides front-panel USB-C port connectivity, whereas the front panel system header uses individual pin pairs for power/reset switches and status LEDs.
Front-panel headers separate high-speed data throughput interfaces from basic low-voltage mechanical switches and diagnostic indicator LEDs.

Key Concept

Motherboard Power Connectors and Header Pinouts
Question 207Question →

A technician is assembling a desktop computer and has connected the 24-pin ATX power cable from the power supply unit to the motherboard. When the power button is pressed, the internal LEDs light up and the cooling fans spin, but the system fails to complete POST and provides no power to the processor. Which of the following power connections did the technician most likely omit?

Show answer & explanation

Answer: The 4-pin or 8-pin EPS12V / CPU power connector located near the CPU socket

Answer

The 4-pin or 8-pin EPS12V / CPU power connector located near the CPU socket
The correct option is the choice specifying the 4-pin or 8-pin EPS12V connector. Modern motherboards require a separate 4-pin or 8-pin power connection located near the processor socket to power the CPU voltage regulator circuits. Connecting only the 24-pin main ATX power cable provides power to board components and cooling fans, but leaves the processor unpowered, causing POST to fail.

Step-by-Step Solution

1
Analyze the reported system symptoms
System receives baseline power (LEDs and fans turn on via the 24-pin main ATX connection), but CPU does not initialize and POST fails.
The 24-pin ATX connector supplies power to motherboard circuitry, RAM, and PCIe slots, but modern CPUs require a dedicated power source.
2
Identify the missing required motherboard connector
Identify the 4/8-pin EPS12V auxiliary CPU power connector.
The EPS12V (or ATX12V) connector provides dedicated +12V lines specifically for the CPU voltage regulator module (VRM).

Key Concept

Motherboard Power Connectors and CPU Power Requirements
Question 208Question →

A system technician is upgrading a high-density virtualization server host from an older processor to a modern multi-core x86_64 processor. The motherboard utilizes a Land Grid Array (LGA) socket architecture. During the installation planning, the technician must also verify thermal management and hardware-assisted virtualization support. Which combination of architectural characteristics and installation procedures correctly describes this processor deployment?

Show answer & explanation

Answer: The socket pins are located on the motherboard rather than the CPU package; hardware-assisted virtualization (VT-x/AMD-V) must be enabled in UEFI/BIOS, and a thin layer of thermal compound is required between the CPU integrated heat spreader and heatsink.

Answer

In Land Grid Array (LGA) architectures, the spring-loaded pins are situated directly within the motherboard socket. Bare-metal 64-bit hypervisors require enabling CPU hardware-assisted virtualization (Intel VT-x or AMD-V) in the system UEFI/BIOS, and thermal interface material (TIM) must be applied between the CPU's Integrated Heat Spreader (IHS) and the heatsink or cold plate.
Land Grid Array (LGA) sockets feature pins on the motherboard socket rather than on the processor packaging. Deploying a virtualization host requires enabling hardware-assisted virtualization (VT-x/AMD-V) in system firmware, and thermal compound must always be applied between the CPU integrated heat spreader and the thermal block to facilitate heat transfer.

Step-by-Step Solution

1
Identify the physical architecture of an LGA socket.
Confirm that LGA sockets house pins on the motherboard socket grid, whereas the processor underside features flat conductive pads.
Prevents mistaking LGA features for PGA (pins on CPU) or BGA (soldered chip).
2
Determine thermal interface requirements.
Verify that thermal compound is required to eliminate air pockets between the processor IHS and the cooling surface regardless of active, passive, or liquid cooling methods.
Air is a poor heat conductor, leading to rapid thermal throttling if thermal compound is omitted.
3
Analyze firmware prerequisites for 64-bit guest virtualization.
Identify that Intel VT-x or AMD-V extensions must be toggled on within the UEFI/BIOS settings.
Type 1 hypervisors require hardware-level virtualization support to run 64-bit guest operating systems efficiently.

Key Concept

LGA socket physical pin arrangement, thermal interface material application, and hardware-assisted CPU virtualization requirements.
Question 209Question →

A technician is upgrading the system memory in a standard laptop computer. Which physical RAM form factor should the technician select for installation?

Show answer & explanation

Answer: SO-DIMM

Answer

SO-DIMM (Small Outline Dual In-line Memory Module) is the correct form factor used in laptops.
SO-DIMM (Small Outline Dual In-line Memory Module) is specifically engineered with a smaller footprint and pin layout to accommodate the tight physical space constraints of laptop motherboards.

Step-by-Step Solution

1
Identify the system form factor
The target machine is a standard laptop computer.
Laptops require compact hardware components due to space restrictions.
2
Match the RAM form factor to laptop requirements
Select SO-DIMM memory.
SO-DIMM modules are roughly half the length of standard desktop DIMMs and fit laptop RAM slots.

Key Concept

RAM Form Factors (SO-DIMM vs DIMM)
Estimated Time:45s
Question 210Question →

A field technician is deploying a network management appliance inside an industrial facility with significant electromagnetic interference (EMI) from heavy motorized equipment. The deployment requires establishing a direct connection to a legacy switch console port using an RS-232 serial interface, as well as running a 10Gbps Ethernet network trunk line over a distance of 85 meters (85 m85\text{ m}) across the factory floor. Which TWO of the following cabling standards and physical connector types must the technician select to meet these requirements?

Select all that apply

Show answer & explanation

Answer: DB-9 connector for the serial console interface; STP Category 6a cable for the Ethernet network trunk line

Answer

The technician should select the DB-9 connector for the serial console connection and STP Category 6a cabling for the 10Gbps Ethernet trunk line.
Connecting to a legacy RS-232 serial console port requires a DB-9 connector. Running 10Gbps Ethernet over 85 meters in an environment with high electromagnetic interference requires Category 6a STP cabling, which supports 10Gbps up to 100 meters and includes foil shielding against motor noise.

Step-by-Step Solution

1
Identify physical connector requirement for legacy RS-232 serial console connectivity.
Legacy RS-232 management ports utilize 9-pin D-subminiature (DB-9 / DE-9) physical connectors.
DB-9 connectors provide the dedicated pins required for RS-232 asynchronous serial data communication.
2
Determine copper Ethernet cabling requirement for 10Gbps throughput across an 85m industrial span.
Category 6a supports 10Gbps up to 100 meters, and Shielded Twisted Pair (STP) protects data signals from industrial EMI.
Standard Cat 6 UTP drops throughput to 1Gbps beyond 55 meters and lacks shielding against heavy electrical motor noise.

Key Concept

Selecting appropriate copper cabling standards (Category 6a STP vs Cat 6 UTP) and serial peripheral connectors (DB-9) based on distance, bandwidth, and environmental EMI constraints.
Question 211Question →

A systems technician is deploying a specialized edge computing appliance designed to run several client virtual machines. During hardware inspection, the technician observes that the processor is permanently soldered directly onto the system board using an array of solder spheres rather than fitting into a removable socket. When attempting to start 64-bit guest virtual machines, the hypervisor throws an error stating that hardware-assisted virtualization is unavailable. Which of the following correctly identifies this CPU socket/packaging type and the required step to enable hypervisor support?

Show answer & explanation

Answer: BGA (Ball Grid Array) packaging; enable hardware virtualization extensions (such as Intel VT-x or AMD-V) in the motherboard's UEFI/BIOS settings.

Answer

The correct option identifies the processor as BGA (Ball Grid Array) packaging and specifies enabling hardware virtualization extensions (Intel VT-x or AMD-V) within the UEFI/BIOS settings.
Processors permanently soldered to the motherboard using solder spheres use Ball Grid Array (BGA) packaging. In addition, hosting 64-bit guest virtual machines requires hardware-assisted virtualization (Intel VT-x or AMD-V), an architectural CPU feature that must be enabled in the system UEFI/BIOS.

Step-by-Step Solution

1
Analyze the physical CPU mounting description
Processors soldered directly to the motherboard using an array of solder balls use BGA (Ball Grid Array) packaging and cannot be upgraded via a standard socket swap.
BGA is designed for compact and embedded systems where the CPU is permanently attached during manufacturing.
2
Analyze the hypervisor error regarding hardware-assisted virtualization
Virtualization extensions (Intel VT-x / AMD-V) are architectural CPU features supported by modern x86/x64 processors but are often toggled off by default in firmware.
Enabling hardware virtualization in UEFI/BIOS exposes the necessary hardware extensions to the host operating system and hypervisor.

Key Concept

CPU packaging types (BGA vs LGA vs PGA) and architectural CPU virtualization features (VT-x / AMD-V)
Estimated Time:1m 30s
Question 212Question →

A technician is connecting a high-performance external solid-state drive enclosure requiring up to 40 Gbps throughput to a workstation. The workstation features a USB Type-C port marked with a Thunderbolt icon. Which cable should the technician select to ensure maximum data transfer speed?

Show answer & explanation

Answer: A Thunderbolt 4 USB Type-C cable

Answer

The technician should select a Thunderbolt 4 USB Type-C cable to achieve the maximum 40 Gbps data throughput.
Thunderbolt 4 uses the USB Type-C form factor and delivers up to 40 Gbps data throughput. Using a certified Thunderbolt 4 cable ensures all required high-speed differential signal lanes are physically present.

Step-by-Step Solution

1
Identify the peripheral throughput specification and host interface type.
The external storage drive requires 40 Gbps throughput, and the workstation provides a Thunderbolt-enabled USB Type-C port.
Cable selection must meet both physical form factor and protocol bandwidth requirements.
2
Select a cable rated for the required protocol standard.
A certified Thunderbolt 4 USB Type-C cable supports full 40 Gbps bidirectional transfer speeds.
Physical connector compatibility does not guarantee protocol performance; internal cable wiring must support the high-speed signaling protocol.

Key Concept

Distinction between physical connector form factor (USB Type-C) and protocol throughput standards (Thunderbolt 4 vs USB 2.0)
Question 213Question →

A field technician is deploying network cables inside an industrial facility where cables will run through ceiling air handling spaces and near heavy machinery generating high electromagnetic interference (EMI). Which TWO cable specifications or construction features should the technician select for this environment? Select TWO.

Select all that apply

Show answer & explanation

Answer: Shielded Twisted Pair (STP) cabling to mitigate electromagnetic interference; Plenum-rated jacket insulation to comply with building fire safety standards

Answer

The correct selections are Shielded Twisted Pair (STP) cabling to mitigate EMI and Plenum-rated jacket insulation to comply with building fire codes in air handling spaces.
Shielded Twisted Pair (STP) provides metallic shielding to block electromagnetic interference (EMI) from heavy machinery, while plenum-rated jacket insulation is flame-retardant and releases low smoke, meeting safety requirements for air handling plenum spaces.

Step-by-Step Solution

1
Analyze environmental noise requirements
Industrial machinery generates heavy electromagnetic interference (EMI), requiring Shielded Twisted Pair (STP) cabling rather than Unshielded Twisted Pair (UTP).
STP incorporates metallic foil or braid shielding that blocks noise from external electrical equipment.
2
Analyze environmental space and fire safety requirements
Ceiling air handling spaces are classified as plenum spaces, requiring plenum-rated (CMP) cable jacketing.
Plenum cables resist fire and emit low toxic fumes if burned, whereas PVC cables emit hazardous gases in air circulation spaces.

Key Concept

Cable Shielding and Fire Rating Specifications
Question 214Question →

Match each physical connector or cable type on the left with its primary application or characteristic on the right.

Click a left item, then click its matching right item

Items

RJ45 Connector
USB Type-C
DB9 Connector
RG-6 Coaxial Cable

Matches

Show answer & explanation

Answer

RJ45 Connector matches the 8P8C Ethernet plug description; USB Type-C matches the reversible multi-function connector description; DB9 Connector matches the legacy 9-pin serial/console connector description; RG-6 Coaxial Cable matches the thick shielded cable for cable TV and modems.
Each connector corresponds to its standard hardware specification: RJ45 is 8P8C for Ethernet cables, USB Type-C is reversible and multi-protocol, DB9 is a 9-pin serial connector, and RG-6 is coaxial cabling for cable broadband.

Step-by-Step Solution

1
Identify the primary Ethernet networking connector.
RJ45 is an 8P8C connector used on twisted-pair cables like Cat 5e/6.
Ethernet cabling standard dictates RJ45 physical connectors.
2
Identify the universal peripheral connector with reversible orientation.
USB Type-C is the 24-pin reversible connector that handles data, display, and power.
USB Type-C physical standard provides high pin density for multiple protocols.
3
Identify the serial interface connector used for hardware management.
DB9 is a 9-pin D-sub connector used for serial communication (RS-232).
DB9 connectors are legacy serial ports used for management/console access.
4
Identify the coaxial cabling used for cable internet and TV.
RG-6 is the standard coaxial cable for high-frequency video and cable broadband.
RG-6 has a thicker core wire and heavier shielding than RG-59.

Key Concept

Network and peripheral cabling connector physical formats and capabilities.
Question 215Question →

A technician is connecting modern external peripherals to a high-end workstation using USB Type-C cables. Which TWO of the following statements correctly describe capabilities provided by the physical USB Type-C connector specification? (Select TWO.)

Select all that apply

Show answer & explanation

Answer: It features a reversible physical plug design that can be inserted in either orientation.; It can deliver power, high-speed data, and video signals over a single cable connection.

Answer

USB Type-C features a reversible plug design and supports simultaneous delivery of power, data, and video signals over a single connection when paired with compatible host controllers and cables.
The USB Type-C connector is designed with a symmetrical, reversible plug layout and supports Alternate Modes alongside USB Power Delivery (USB-PD). This allows a single USB Type-C cable to simultaneously transmit power, display signals, and data.

Step-by-Step Solution

1
Analyze physical connector features
Identify that USB Type-C was designed specifically with a symmetrical pin arrangement to allow reversible insertion.
Improves user usability over directional legacy connectors like USB Type-A or Micro-USB.
2
Evaluate protocol and feature multiplexing capabilities
Confirm that USB Type-C supports USB-PD (Power Delivery) and Alternate Modes (DisplayPort, Thunderbolt).
Allows a single cable to transport power, high-resolution video, and high-speed peripheral data.
3
Differentiate physical form factor from protocol standards
Reject claims that all Type-C cables support 40 Gbps Thunderbolt rates automatically.
Physical connector shape does not imply underlying protocol support unless explicitly certified.

Key Concept

Distinction between USB Type-C physical form factor characteristics and protocol-level capabilities (Alternate Modes / USB-PD).
Question 216Question →

A field technician is deploying a desktop computer and needs to connect an unshielded twisted-pair (UTP) Ethernet cable to the motherboard's built-in network interface card (NIC). Which physical connector type is standard for this network connection?

Show answer & explanation

Answer: RJ45

Answer

RJ45 is the standard physical connector used for UTP Ethernet network connections.
RJ45 is the industry-standard 8P8C modular connector utilized for twisted-pair Ethernet networking across Category 5e, 6, and 6a cables.

Step-by-Step Solution

1
Identify the cable type and network requirement from the scenario.
The scenario requires connecting an unshielded twisted-pair (UTP) network cable to an Ethernet NIC.
Determining the media type helps select the correct standardized modular connector.
2
Select the standard connector corresponding to 8-conductor twisted-pair Ethernet cables.
The RJ45 connector (8P8C form factor) is universally used for terminating Cat 5e and Cat 6 Ethernet patch cables.
It accommodates all four twisted wire pairs required for full Ethernet network standards.

Key Concept

Twisted-pair Ethernet connectors (RJ45)
Question 217Question →

A field technician needs to establish a direct local management session from a legacy maintenance laptop featuring a DB-9 serial port to the RJ45 console port of a newly mounted network switch. Which cable type should the technician use to successfully establish this management connection?

Show answer & explanation

Answer: DB-9 to RJ45 rollover cable

Answer

The technician should use a DB-9 to RJ45 rollover cable to connect the DB-9 serial interface on the workstation to the switch's RJ45 console port.
Connecting a computer's serial port (DB-9) to a router or switch management port (RJ45) requires a rollover cable (or serial console cable). This cable properly routes serial transmit and receive signals to establish out-of-band terminal management.

Step-by-Step Solution

1
Identify the ports on both host and target devices
The host laptop has a 9-pin D-subminiature (DB-9) serial port, while the switch management interface is an RJ45 console port.
Out-of-band administrative access requires matching host serial signaling with target console pinouts.
2
Select the appropriate serial conversion cable type
Choose a DB-9 to RJ45 rollover (console) cable.
Rollover cables roll the pin positions from one end to the other to correctly pair transmit (TX), receive (RX), and ground pins between DB-9 serial controllers and RJ45 console interfaces.

Key Concept

Serial and Console Cable Standards
Question 218Question →

A network technician is auditing legacy and modern cabling infrastructure in an enterprise deployment. Match each cable or connector type on the left with its correct physical characteristic or performance specification on the right.

Click a left item, then click its matching right item

Items

RG-6 Coaxial Cable
Cat 6a UTP Cable
Single-Mode Fiber Cable
eSATA Cable

Matches

Show answer & explanation

Answer

RG-6 Coaxial Cable matches 75-ohm broadband/F-type connectors; Cat 6a UTP Cable matches 10 Gbps at 500 MHz up to 100m; Single-Mode Fiber Cable matches narrow core laser transmission up to 40 km; eSATA Cable matches 6 Gbps external drive connectivity limited to 2 meters.
Each cable type aligns precisely with its engineering specification: RG-6 operates at 75-ohm impedance with F-type connectors; Cat 6a provides 10 Gbps bandwidth at 500 MHz up to 100m; Single-Mode Fiber uses lasers across a 9-micron core for distances up to 40 km; eSATA offers 6 Gbps external storage connections with a 2-meter maximum length.

Step-by-Step Solution

1
Identify the RF broadband media characteristics.
Connect RG-6 coaxial cable to 75-ohm impedance, F-type threaded connectors, and cable modem applications.
RG-6 is engineered specifically with 75-ohm characteristic impedance and thick shielding for cable internet and TV signals.
2
Evaluate high-speed Ethernet copper cabling standards.
Associate Category 6a (Cat 6a) with 500 MHz frequency rating and 10 Gbps throughput over 100 meters.
Standard Cat 6 is limited to 37–55 meters for 10 Gbps, whereas Cat 6a reduces crosstalk to maintain 10 Gbps over the full 100m distance.
3
Analyze optical fiber transmission modes.
Associate Single-Mode Fiber (SMF) with a narrow glass core (~9 μm), laser illumination, and long-range limits (up to 40 km).
Multi-mode fiber uses LED light sources and larger cores (~50–62.5 μm) for shorter distances, while single-mode uses focused lasers for long-haul WAN links.
4
Determine external peripheral storage bus limits.
Match eSATA with 6 Gbps raw transfer speed and a strict 2-meter physical distance limit.
eSATA maintains native SATA controller speeds to external drives without conversion overhead, but strict signal attenuation caps its maximum cable length at 2 meters.

Key Concept

Network and Peripheral Cable Specifications, Distances, and Connector Standards
Estimated Time:1m 30s
Question 219Question →

A help desk technician needs to terminate an unshielded twisted-pair (UTP) Category 6 network cable to connect a computer to a standard Ethernet wall jack. Which physical connector should be attached to the end of the cable?

Show answer & explanation

Answer: RJ45

Answer

RJ45
The RJ45 connector is the industry standard 8-pin connector used to terminate Category 5e, Category 6, and Category 6a twisted-pair cables for Ethernet network connections.

Step-by-Step Solution

1
Identify the media type and purpose.
The scenario requires connecting an Ethernet network cable (Category 6 UTP) to a standard network wall port.
Matching the cable category and network standard dictates the physical connector required.
2
Select the corresponding connector standard.
RJ45 is the standard 8P8C modular connector designed specifically for 4-pair twisted-pair Ethernet cabling.
RJ45 accommodates all 8 conductors (4 pairs) found inside Category 6 cable to establish high-speed Ethernet communication.

Key Concept

Twisted-pair network cable termination standards
Question 220Question →

A technician is installing an internal SSD into a high-performance video editing workstation. The workstation configuration requires storage read speeds exceeding 3,000 MB/s. Which drive interface and protocol combination must the technician select to meet this throughput requirement?

Show answer & explanation

Answer: NVMe over PCIe

Answer

The technician must select NVMe over PCIe to meet the requirement.
NVMe over PCIe is specifically designed for high-performance flash drives and leverages multiple PCIe lanes to easily achieve transfer speeds above 3,000 MB/s.

Step-by-Step Solution

1
Identify the target transfer rate specified in the scenario.
The requirement specifies throughput exceeding 3,000 MB/s.
Establishing the target transfer speed allows filtering out interfaces capped at lower speeds.
2
Compare interface maximum speeds.
SATA interfaces max out at ~600 MB/s, whereas NVMe operating on PCIe lanes can reach multi-gigabyte per second transfer rates.
NVMe over PCIe provides direct connection to CPU/PCIe lanes, overcoming SATA bus bottlenecks.

Key Concept

NVMe vs SATA Interface Bandwidth Limits
Estimated Time:45s
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Hardware Practice Questions — CompTIA A+ (Core 1 & Core 2) — Page 11 | Examkin