CompTIA 220-1101 Practice Test - Questions Answers, Page 53

A power supply unit (PSU) is a component that converts AC power from the wall outlet to DC power that can be used by the computer components. A PSU has various specifications, such as input voltage, output voltage, wattage, connector type, form factor, and efficiency rating3. In this scenario, the engineer is building a workstation that requires the following components: an ATX motherboard, a multi-core processor, a dedicated graphics solution, a SATA hard drive, and DDR4 memory. The most suitable power supply specification for this workstation is 12V, 500W output. This means that the PSU can provide 12 volts of DC power and 500 watts of total power to the components. 12V is the standard output voltage for most modern PSUs, and it is compatible with the ATX motherboard and the SATA hard drive4. 500W is a sufficient wattage for a workstation that has a multi-core processor and a dedicated graphics solution, which are power-hungry components5. The other power supply specifications are not suitable for this workstation because:

* SFX, 18-pin connector is a form factor and a connector type that are not compatible with the ATX motherboard, which requires an ATX form factor and a 24-pin connector6.

* DC input is a type of input voltage that is not common for desktop PSUs, which usually use AC input from the wall outlet.

* Type A socket is a type of AC power plug that is used in North America and Japan, but it is not a power supply specification.

Reference

3: What Power Supply Do I Have: Quick Ways to Find Your PSU Specs

4: Power Supply 101: A Reference Of Specifications

5: How to Choose the Right Power Supply for Your PC

6: SFX vs ATX PSU: What's the Difference?

: AC vs DC Power Supply: What's the Difference?

: AC power plugs and sockets - Wikipedia

Two-factor authentication (2FA) is a method of verifying a user's identity by requiring two pieces of evidence: something the user knows (such as a password) and something the user has (such as a device). A mobile authenticator application is a software program that runs on a smartphone or tablet and generates a one-time code or token that the user can enter along with their password to access a system. This adds an extra layer of security to prevent unauthorized access.

Reference

* The Official CompTIA A+ Core 1 Student Guide (Exam 220-1101), page 13-14

* CompTIA A+ Certification Exam Core 1 Objectives, page 9, objective 2.5

* What is Two-Factor Authentication?

A thermal receipt printer uses heat to print on thermal paper, which has a special coating that reacts to heat and produces black marks. If the paper roll is inserted in the wrong orientation, the printer will not be able to print anything on the paper. Therefore, the first thing the technician should do is to check if the paper roll is loaded correctly, with the paper feeding under, not over. This is a common and easy mistake to fix, and it does not require any software or hardware changes.

Reference

* Troubleshooting Your Thermal Printer Problems - Thermal POS Receipt Printer Tips & Tricks, paragraph 2

* POS Thermal Receipt Printer Troubleshoot - Not Printing Evenly, video at 0:15

* Receipt Printer Troubleshooting -- Shopfront, bullet point 2

ipconfig is a command-line tool that displays the current configuration of the network interfaces on a Windows PC. It can also be used to release and renew the IP address, flush the DNS cache, and display the routing table. If the PC is unable to ping the local gateway, the technician should use ipconfig to check the IP address, subnet mask, default gateway, and DNS servers of the PC. The technician can also use ipconfig /renew to request a new IP address from the DHCP server, or ipconfig /flushdns to clear the DNS cache.

Reference

* [CompTIA A+ Core 1 (220-1001) Certification Study Guide], page 78

* How to use the ipconfig command on Windows 10

* How to Ping the Windows Network Router

MMS (Multimedia Messaging Service) is a type of text message that can include images, videos, audio, or other media files. Unlike SMS (Short Message Service), which only uses cellular networks, MMS requires mobile data service to send and receive messages. Therefore, if the mobile data service is disabled on the smartphone, the user will not be able to send or receive MMS messages, even if they can make and receive voice calls using the cellular network.

Reference

* What is MMS messaging? How to send and receive MMS messages on your iPhone or Android device

* Why Can't I Send or Receive MMS Messages?

* The Official CompTIA A+ Core 1 Student Guide (Exam 220-1101), page 349

The user's smartphone is losing its charge rapidly and feels thicker than it was when new.Both of these symptoms point towards abad battery.

A bad battery loses its ability to hold a charge,leading to rapid draining.Additionally,a bad battery can physically swell,which explains why the phone feels thicker.

Malware infection,damaged charge port,and poor connectivity are unlikely causes for both the rapid draining and the increased thickness.

Reference

CompTIA A+ Certification Core 1 220-1101 Study Guide,Chapter 2:Mobile Devices,Section 2.2 Mobile Device Batteries

https://www.comptia.org/training/books/a-core-1-220-1101-study-guide

The technician is unable to access the company portal website, but other websites work fine. This suggests an issue with resolving the specific URL of the company portal, which is a function of DNS.

Here's why other options are not the most likely cause:

DHCP reservations:This is not relevant as the issue persists even when the technician tries a different workstation,indicating a problem beyond individual device configuration.

Static IP addresses:Similar to DHCP reservations,static IPs are not likely the cause as both affected workstations are experiencing the issue.

Default gateway:While the default gateway is necessary for internet access,other websites are working,making it less likely to be the root cause.

CompTIA A+ Certification Core 1 220-1101 Study Guide,Chapter 4:Networking,Section 4.2 Addressing and Naming

The technician is unable to access the company portal website, but other websites work fine. This suggests an issue with resolving the specific URL of the company portal, which is a function of DNS.

Here's why other options are not the most likely cause:

DHCP reservations:This is not relevant as the issue persists even when the technician tries a different workstation,indicating a problem beyond individual device configuration.

Static IP addresses:Similar to DHCP reservations,static IPs are not likely the cause as both affected workstations are experiencing the issue.

Default gateway:While the default gateway is necessary for internet access,other websites are working,making it less likely to be the root cause.

CompTIA A+ Certification Core 1 220-1101 Study Guide,Chapter 4:Networking,Section 4.2 Addressing and Naming

The problem in this scenario is that the battery charger is not a USB device, but a device that plugs into a USB port to draw power. Therefore, it does not have a unique identifier that can be recognized by the peripheral security software, which is designed to prevent unauthorized USB devices from accessing the company's network or data. The security software cannot add the battery charger to its whitelist, and may block its power supply or generate alerts.

The best solution for this problem is to provide a USB to AC adapter for the battery charger, which is a device that converts the USB power output to an AC power input that can be plugged into a wall outlet. This way, the battery charger does not need to connect to the docking station or the computer, and does not trigger the peripheral security software. The user can still charge the camera's battery without compromising the company's security policy.

The other options are not advisable because they either do not solve the problem or create new risks. Option B, adding a powered USB hub to the docking station, may not work if the security software also monitors the hub's ports and detects the battery charger as an unknown device. Option C, disabling the peripheral security software for this user only, is a very bad idea because it exposes the user's computer and the company's network to potential attacks from malicious USB devices. Option D, replacing the battery charger with a USB device that has a unique identifier, is unnecessary and costly, and may not be compatible with the camera's battery.

CompTIA A+ Core 1 (220-1101) Certification Study Guide, Chapter 9: Security, Section 9.3: Device Security, Page 419

CompTIA A+ Core 1 (220-1101) and Core 2 (220-1102) Pearson uCertify Course and Labs and Textbook Bundle, Chapter 9: Security, Section 9.3: Device Security, Page 420

CompTIA A+ Core 1 (220-1101) and Core 2 (220-1102) Exam Cram, Chapter 9: Security, Section 9.3: Device Security, Page 402