CompTIA 220-1101 Practice Test - Questions Answers, Page 45

The most likely issue is C. Tray settings.

Tray settings are the configuration options that tell the printer what size and type of paper is loaded in each tray. If the tray settings do not match the actual paper size and type, the printer may not be able to feed the paper correctly and cause paper jams.

In this scenario, the team that is having issues prints legal-sized documents, which are 8.5 x 14 inches, while the other teams print letter-sized documents, which are 8.5 x 11 inches. If the printer's tray settings are set to letter size by default, the printer may not recognize the legal-sized paper and try to pull it as if it were letter-sized paper. This can result in paper jams or misaligned printing.

To fix this issue, the team should check and adjust the tray settings on the printer to match the paper size and type they are using. They can also use a separate tray for legal-sized paper and another tray for letter-sized paper, and make sure to select the correct tray when printing.

The other options are less likely to cause the issue, because:

• Worn rollers are the rubber parts that grip and move the paper through the printer. They can wear out over time and lose their traction, causing paper jams or misfeeds. However, worn rollers would affect all teams and all paper sizes, not just one team and one paper size.

• Page orientation is the direction of the paper, either portrait or landscape. It can affect how the document is printed on the paper, but not how the paper is fed into the printer. Page orientation can be changed in the print settings or in the document itself, but it would not cause paper jams unless the paper size is also incorrect.

• Multipage misfeed is when more than one sheet of paper is pulled into the printer at once, causing a jam. This can happen if the paper is too thin, too thick, or too slippery, or if there is too much or too little paper in the tray. However, multipage misfeed would also affect all teams and all paper sizes, not just one team and one paper size.

For more information and tips on how to prevent and fix paper jams, you can visit these links:

• Fix Paper Jam Errors | HP® Support

• Common Causes of Paper Jams and How to Fix Them - 1ink.com

The correct answer is D. Raise the filament flow amount.

Filament flow amount, also known as extrusion multiplier or flow rate, is the setting that controls how much filament is extruded by the nozzle during 3D printing. It is usually expressed as a percentage of the default value, which is 100%. Increasing the filament flow amount means extruding more filament than usual, while decreasing it means extruding less1.

The filament flow amount can affect the quality and adhesion of the first layer, which is crucial for a successful 3D print. If the filament flow amount is too low, the nozzle may not extrude enough filament to fill the gaps between the lines and create a smooth and solid first layer. This can result in poor adhesion, curling, warping, or detachment of the print from the bed12.

To improve adherence on the first layer, the user should raise the filament flow amount slightly, such as 105% or 110%, to ensure that enough filament is extruded to create a strong bond with the bed.

The user should also make sure that the nozzle height, bed leveling, and bed temperature are properly calibrated for optimal first layer adhesion12.

The other options are less likely to improve adherence on the first layer, because:

• Lowering the print bed temperature may reduce the adhesion of the TPU filament to the bed, as TPU usually requires a bed temperature between 20-60°C for the best results3. Lowering the bed temperature may also increase the risk of warping or curling of the print4.

• Adjusting the RPM of the cooling fan may not have a significant effect on the first layer adhesion, as cooling fans are not required with TPU3. In fact, using a cooling fan with TPU may cause cracking or delamination of the print, as TPU needs to cool down slowly and evenly4.

• Increasing the print speed may worsen the first layer adhesion, as TPU is a flexible and elastic filament that needs to be printed slowly and consistently. A recommended print speed for TPU is 15-30mm/s3. Increasing the print speed may cause clogging, stringing, blobs, or under-extrusion of the filament4.

For more information and tips on how to 3D print TPU filament like a pro, you can visit these links:

• How to 3D Print TPU Filament Like a Pro – Ultimate Guide & FAQ

• The Complete TPU Filament 3D Printing Guide - 3DSourced

• TPU Filament 3D Printing Material – The Complete Guide

• TPU filament - learn everything about the TPU material for 3D printing

A burning smell on a desktop computer is a serious issue that indicates a hardware malfunction or failure. It can be caused by overheating, a faulty power supply, a malfunctioning motherboard, or a short circuit12. If left unchecked, it can damage the components, cause a fire, or harm the user.

The first thing the technician should do when troubleshooting a burning smell on a desktop computer is to unplug the computer from the power source. This will stop the flow of electricity and prevent further damage or fire. The technician should also wear protective gloves and eye wear to avoid contact with any hot or hazardous parts.

The other options are less likely to be the first step in troubleshooting, because:

• Locating a fire extinguisher is a good precaution, but it should not be done before unplugging the computer. The fire extinguisher should only be used if there is visible smoke or flames coming from the computer, and only after unplugging it and ensuring that it is safe to do so.

• Calling the fire department is an extreme measure that should only be done if there is an actual fire that cannot be controlled by the fire extinguisher. It should not be done before unplugging the computer and trying to identify and fix the problem.

• Removing the desktop cover is a necessary step to inspect the internal components and find the source of the burning smell. However, it should not be done before unplugging the computer, as it can expose the technician to live wires and electric shocks.

For more information and tips on how to troubleshoot a burning smell on a desktop computer, you can visit these links:

• How to find the source of a burning smell in my computer?

• Burning Smell From PC? 10 Reasons Why It Could Happen

Virtualization is a technology that allows creating multiple virtual machines (VMs) on a single physical server. Each VM can run its own operating system and applications, and share the resources of the physical server, such as CPU, memory, disk, and network1. Virtualization can help improve server utilization and management in several ways, such as:

• Reducing the number of physical servers needed to run the same workload, which can lower the costs of hardware, power, cooling, and maintenance1.

• Increasing the flexibility and scalability of the server infrastructure, as VMs can be created, deleted, moved, or resized on demand without affecting the other VMs or the physical server1.

• Enhancing the availability and reliability of the server applications, as VMs can be backed up, restored, or migrated to another physical server in case of failure or maintenance1.

• Improving the security and isolation of the server data, as VMs can be configured with different levels of access and protection, and separated from each other and the physical server1.

A sandbox is a virtual environment that allows testing or running applications without affecting the main system. A sandbox can isolate the applications from the rest of the system, preventing any unwanted changes, errors, or security risks. A sandbox can also be easily reset to the initial state, discarding any modifications or data generated by the applications12.

A sandbox is a useful tool for stress testing multiple applications, as it can:

• Simulate different scenarios and conditions for the applications, such as high load, low memory, network latency, etc.

• Monitor and measure the performance, stability, and resource consumption of the applications under stress.

• Compare and analyze the results of different applications or different versions of the same application.

• Identify and fix any bugs, errors, or vulnerabilities in the applications before deploying them to the main system.

Hyperthreading is a feature of some CPUs that allows them to execute two threads (sequences of instructions) simultaneously on each core. Hyperthreading can improve the performance of CPUintensive tasks, such as data analytics, by increasing the utilization of CPU resources and reducing idle time. The technician should verify that hyperthreading is enabled in the BIOS settings of the workstation.

NVMe stands for Non-Volatile Memory Express, and it is a type of SSD (solid state drive) that uses PCIe (Peripheral Component Interconnect Express) interface to connect to a computer. NVMe SSDs offer faster performance and lower latency than other types of SSDs, such as SATA (Serial ATA) or M.2 SATA. If a user reports that a PC occasionally fails to boot and makes clicking sounds in the area where non-volatile storage is installed, it indicates that the hard drive is failing and needs to be replaced with an NVMe SSD.

A router is a device that connects multiple networks and forwards packets between them based on their destination IP addresses. A router can also perform DHCP (Dynamic Host Configuration

Protocol) function, which means it can dynamically distribute IP addresses to devices on its network.

A router can also provide other features, such as firewall, NAT (Network Address Translation), VPN (Virtual Private Network), and QoS (Quality of Service).

AAA stands for Authentication, Authorization, and Accounting, and it is a framework that provides security services for network access control. Authentication verifies the identity of a user or device that requests access to a network resource. Authorization determines what level of access or privileges are granted to a user or device based on their identity or role. Accounting tracks and records the usage of network resources by users or devices for billing or auditing purposes. RADIUS (Remote Authentication Dial-In User Service) is a protocol that implements AAA functions by communicating with a central server that stores user credentials and policies.