無料220-1101サンプル問題で100%カバー率のリアル試験問題（更新された672問あります)
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質問 # 157
Several users report that a projector routinely turns off in the middle of meetings and does not tum back on immediately. Users have to wait several minutes before the projector will turn back on. When the projector is on, the picture is clear and bright. Which of the following is the most likely reason the projector is turning off?
- A. The projector is overheating and needs to be cleaned.
- B. The video cable connecting the video source to the projector is failing.
- C. The outlet that the projector is plugged into is faulty.
- D. The bulb in the projector is failing.
正解：A
解説：
Explanation
The projector is overheating and needs to be cleaned. A common cause of projector shutdown is overheating, which can be triggered by dust accumulation, blocked vents, or faulty fans. The projector has a thermal protection circuit that turns it off when the temperature reaches a certain level, and it will not turn back on until it cools down. To prevent this issue, the projector needs to be cleaned regularly and placed in a well-ventilated area. The video cable, the bulb, and the outlet are not likely to cause the projector to turn off intermittently.
質問 # 158
A user's smartphone repeatedly loses the connection to a home Wi-Fi network. The user has already tried restarting the smartphone, rebooting the router, and resetting the smartphone's Wi-Fi network settings. Which of the following should the user do next to resolve the issue?
- A. Replace the router.
- B. Switch the router to 5GHz.
- C. Update the smartphone's OS.
- D. Check the range of the router.
正解：C
解説：
If a smartphone repeatedly loses connection to a home Wi-Fi network and the common troubleshooting steps like restarting the device, rebooting the router, and resetting the Wi-Fi settings have not resolved the issue, updating the smartphone's operating system (OS) could be the next logical step. OS updates often include fixes for known bugs and improvements in connectivity and compatibility with network hardware, which could resolve persistent connection issues.
References:
* CompTIA A+ Core 1 (220-1101) Exam Objectives, specifically the sections related to troubleshooting mobile devices and connectivity issues, which would cover the importance of maintaining updated OS versions for optimal performance and compatibility.
* General troubleshooting approaches for mobile devices, with an emphasis on the role of software updates in resolving connectivity and performance issues.
質問 # 159
An IT technician is working on a help desk ticket concerning a user's inability to create a virtual machine. The technician has already checked the RAM and HDD space in the user's machine. Which of the following settings should the technician check NEXT to help troubleshoot the issue?
- A. MSConfig
- B. BitLocker
- C. BIOS
- D. Secure Boot
正解：C
解説：
One of the possible settings that could prevent a user from creating a virtual machine is BIOS (Basic Input/Output System). BIOS is a firmware that controls how hardware components interact with each other and with software applications. Some BIOS settings may need to be changed or enabled to allow virtualization, such as VT-x (Intel Virtualization Technology) or AMD-V (AMD Virtualization). The other options are not related to virtualization settings. Verified References: [How To Enable Virtualization In BIOS Settings].
質問 # 160
A laptop's external webcam software is running, but neither images nor videos can be viewed. Which of the following should a technician do first?
- A. Reseat the webcam.
- B. Restart the computer and run system diagnostics.
- C. Reinstall the webcam software and drivers.
- D. Research new webcam firmware.
正解：A
解説：
Explanation
The first step that a technician should do is A. Reseat the webcam.
Reseating the webcam means unplugging and plugging back the webcam into the laptop's USB port. This can help to ensure that the webcam is properly connected and recognized by the laptop. Reseating the webcam is a simple and quick troubleshooting technique that can solve many common issues, such as loose or faulty connections, power or bandwidth problems, or driver or software conflicts.
Reseating the webcam is the first step that a technician should do, because it follows the principle of starting with the easiest and most obvious solution before moving on to more complex and time-consuming ones.
Reseating the webcam can also help to isolate the problem and eliminate other possible causes.
The other options are not the first steps that a technician should do, because they are more disruptive or less effective. Restarting the computer and running system diagnostics (option B) may be helpful if the problem is caused by a software or hardware error, but it may also cause data loss or interruption of other tasks.
Reinstalling the webcam software and drivers (option C) may be necessary if the problem is caused by a corrupted or outdated software or driver, but it may also introduce compatibility or configuration issues.
Researching new webcam firmware (option D) may be useful if the problem is caused by a firmware bug or vulnerability, but it may also pose security or stability risks.
For more information about troubleshooting external webcams, you can refer to the following web search results: [How to Fix Webcam Problems on Your Laptop], [How to Troubleshoot Webcam Issues on Windows
10], [How to Fix Common Webcam Problems].
質問 # 161
A user on a SOHO network is unable to watch online videos, even at 240 pixels. The technician runs ipconfig from the user's computer and records the following:
The technician then connects a test laptop to the router via the user's Cat 5 cable and records the following information:
Which of the following is MOST likely causing the user's issue?
- A. Bad network cable
- B. Incorrect IP address
- C. Misconfigured default gateway
- D. Faulty NIC
正解：D
質問 # 162
A user's desktop computer is connected via an Ethernet cable and often drops the connection. When the computer does connect, the network speeds are normal. No other network users on the same floor are reporting issues. The administrator verified that all authentication systems are working as intended and the Ethernet cable was replaced. Which of the following is the most likely cause of the issue?
- A. Port flapping
- B. 802.1X configuration
- C. Limited connectivity
- D. Slow network speeds
正解：A
解説：
Explanation
Port flapping, also known as link flapping, is a network issue that causes a switch port's state to fluctuate between up and down within short periods of time. This instability affects network connectivity and performance. Port flapping can be caused by various factors, such as faulty cables, hardware issues, configuration issues, or other network issues12. In this scenario, the user's desktop computer is connected via an Ethernet cable and often drops the connection, while no other network users on the same floor are reporting issues. The administrator verified that all authentication systems are working as intended and the Ethernet cable was replaced. Therefore, the most likely cause of the issue is port flapping on the switch port that connects to the user's computer.
References
1: Port flapping - Definition, common causes, and troubleshoot ...
2: Solved: Port Flapping Issue - Cisco Community
質問 # 163
A technician needs to add storage to a workstation. The workstation does not have room to add any internal storage, so the technician plans to add an external storage device. Which of the following connection types should the technician MOST likely use?
- A. SCSI
- B. NVMe
- C. eSATA
- D. PCIe
正解：C
解説：
Explanation
eSATA is the best choice for adding external storage as it offers a fast transfer rate and is specifically designed for external storage devices. SCSI is an older interface that is rarely used today, PCIe is typically used to add expansion cards to a computer, and NVMe is a newer interface for high-speed solid-state storage, but it is typically used for internal storage devices.
質問 # 164
Which of the following technologies can allow multiple networks to traverse a switch?
- A. VLAN
- B. VRRP
- C. DHCP
- D. VPN
正解：A
質問 # 165
While on a VoIP call, one user is unable to understand the other because the audio is breaking up. Which of the following BEST describes what is occurring on the call?
- A. High latency
- B. External interference
- C. No connectivity
- D. Port flapping
正解：A
解説：
Explanation
High latency is what best describes what is occurring on a VoIP call when one user is unable to understand the other because the audio is breaking up. Latency is the delay between sending and receiving data over a network, and high latency can cause poor quality or interruptions in VoIP calls. External interference, no connectivity, or port flapping are not likely to cause audio breaking up, but rather complete loss of signal or connection.
質問 # 166
A technician is troubleshooting a computer that is not completing POST and gets stuck at the manufacturer logo screen. All internal, removable parts have been disconnected and only the minimum parts necessary to POST were reconnected. However, the symptoms remain the same. Which of the following should the technician try NEXT?
- A. Change the CMOS battery.
- B. Test the RAM in different slots, one at a time.
- C. Replace the motherboard.
- D. Remove and test the power supply.
正解：B
解説：
Explanation
Every computer has a CMOS battery and when you remove that battery, your computer will work almost the same as before. The only difference is you won't be able to save any settings in the BIOS, which includes the date and time. If your PC is not booting after removing CMOS, you need to make sure that you have your CPU and RAM connected because it's not possible for your system to boot without those.. Your motherboard and computer will be able to boot just fine even without a CMOS battery present. The only issue is all your BIOS settings will be reset and the time and date will be inaccurate. You will also be unable to save BIOS settings.
質問 # 167
A customer reports that, after a technician replaced a laptop screen, the laptop is only able to connect to a Wi-Fi network if it is positioned very close to a wireless access point. Which of the following should the technician verify first?
- A. Airplane mode is disabled.
- B. The battery is charging.
- C. The device has the latest OS updates.
- D. The wireless device drivers are the latest version
- E. The internal antennas are connected.
正解：E
解説：
Explanation
The internal antennas are the components that allow the laptop to receive and transmit wireless signals from and to the wireless access point. The internal antennas are usually located inside or around the laptop screen, and they are connected to the wireless network card or adapter by thin wires or cables. If the internal antennas are disconnected, damaged, or misaligned, the laptop may experience wireless connectivity issues, such as low signal strength, limited range, or intermittent connection.
In this scenario, a customer reports that, after a technician replaced a laptop screen, the laptop is only able to connect to a Wi-Fi network if it is positioned very close to a wireless access point. This could indicate that the technician accidentally disconnected or damaged the internal antennas during the screen replacement process, and that the laptop is not receiving enough wireless signals from the wireless access point. Therefore, the first thing that the technician should verify is that the internal antennas are properly connected and positioned inside or around the laptop screen.
To verify and reconnect the internal antennas, the technician should follow these steps :
Turn off the laptop and disconnect it from any power source or external device.
Remove the battery and any screws that secure the laptop screen bezel.
Carefully pry off the laptop screen bezel and expose the internal antennas.
Check if the internal antennas are intact and securely connected to the wireless network card or adapter.
The internal antennas may have different colors or labels, such as black, white, gray, main, aux, or 1, 2.
If the internal antennas are disconnected or loose, reconnect them to the corresponding connectors on the wireless network card or adapter. Make sure that they snap into place and that there is no gap or bend in the wires or cables.
If the internal antennas are damaged or broken, replace them with compatible ones. Make sure that they have the same length and shape as the original ones.
Realign and reposition the internal antennas inside or around the laptop screen. Make sure that they do not interfere with any other component or cable, and that they follow the original path and direction.
Reattach the laptop screen bezel and secure it with screws.
Reinsert the battery and turn on the laptop.
Test the wireless connectivity and performance of the laptop.
質問 # 168
Vertical streaks are appearing on the output of a laser printer. Which of the following items is the MOST likely cause?
- A. Ribbon
- B. Transfer belt
- C. Roller
- D. Drum
正解：D
解説：
Vertical or horizontal lines-Marks that appear in the same place (referred to as repetitive defects) are often due to dirty feed rollers (note that there are rollers in the toner cartridge and fuser unit too) or a damaged or dirty photosensitive drum.
Vertical streaks on a laser printer output are usually caused by a damaged or worn-out drum, which is responsible for transferring toner to the paper. If the drum is damaged, toner may accumulate on certain parts of the drum, leading to streaks on the printed output. References: CompTIA A+ Certification All-in-One Exam Guide, Tenth Edition, Chapter 15
質問 # 169
A virtual file server in the cloud is configured to automatically add compute resources during times of high load on the server. Which of the following describes this cloud feature?
- A. Rapid elasticity
- B. Shared resources
- C. File synchronization
- D. High availability
正解：A
解説：
Explanation
Rapid elasticity is a cloud feature that allows cloud services to scale up or down automatically according to demand or load on the server, without requiring manual intervention or configuration changes by users or administrators.This enables cloud services to provide optimal performance and efficiency at all times, as well as reducing costs by only using resources when needed. Reference:
https://www.comptia.org/training/books/a-core-1-220-1101-study-guide (page 98)
質問 # 170
A technician is upgrading a user's laptop from an HDD to an SSD. The user's laptop only has a single bay for a hard drive. Which of the following characteristics of the SSD is the most important in this scenario?
- A. Form factor
- B. Partition type
- C. Storage size
- D. Transfer speed
正解：A
解説：
When upgrading a laptop's storage from an HDD to an SSD, especially in laptops with only a single bay for a hard drive, the most critical characteristic to consider is the form factor. The form factor must match the physical dimensions and interface of the original HDD to ensure that the SSD can fit into the bay and connect properly. Storage size (B) is important for capacity reasons, transfer speed (D) affects performance, and partition type (A) is a software configuration aspect, but the form factor (C) is crucial for the physical compatibility of the SSD with the laptop.
References:
* CompTIA A+ Core 1 Exam Objectives Section 3.3: Given a scenario, select and install storage devices.
質問 # 171
In which of the following places is a laptop's wireless antenna MOST likely located?
- A. Near the network interface card
- B. Underneath the battery
- C. In the bezel of the lid
- D. Integrated into the motherboard
正解：C
解説：
Explanation
According to Dell Community, the Wi-Fi antenna is located in the top of the LCD display housing. It consists of two elements, fed by two cables, a white main designated on the Wi-Fi card by a white triangle, and a black auxiliary designated on the Wi-Fi card by a black triangle1.
質問 # 172
Which of the following is considered a connectionless protocol?
- A. SSH
- B. UDP
- C. HTTPS
- D. TCP
正解：B
解説：
Explanation
The correct answer is D. UDP.
UDP (User Datagram Protocol) is a connectionless protocol that does not establish a connection before sending or receiving data. UDP simply sends datagrams to the destination without checking if the receiver is ready or not. UDP does not guarantee reliable delivery, error correction, or in-order arrival of the data. UDP is faster and more efficient than connection-oriented protocols for applications that do not require reliability, such as streaming audio or video1
A: SSH (Secure Shell) is not a correct answer. SSH is a connection-oriented protocol that uses TCP (Transmission Control Protocol) as its transport layer. SSH establishes a secure and encrypted connection between two network endpoints before exchanging data. SSH provides authentication, confidentiality, and integrity for remote login and command execution2
B: TCP (Transmission Control Protocol) is not a correct answer. TCP is a connection-oriented protocol that establishes a connection before sending or receiving data. TCP ensures reliable delivery, error correction, and in-order arrival of the data. TCP is slower and more complex than connectionless protocols, but it provides more reliability and quality of service for applications that require it, such as web browsing or email1
C: HTTPS (Hypertext Transfer Protocol Secure) is not a correct answer. HTTPS is a connection-oriented protocol that uses TCP as its transport layer and SSL/TLS as its security layer. HTTPS establishes a secure and encrypted connection between a web browser and a web server before exchanging data. HTTPS provides authentication, confidentiality, and integrity for web transactions, such as online banking or shopping1
質問 # 173
A technician is conducting the following tests on a laptop with a wireless NIC:
*ping of the default gateway
*ping of the localhost
*tracert of the IP address of the default gateway
Which of the following will the technician find by running these tests? (Select two).
- A. Firewall status
- B. MAC address of the wireless NIC
- C. Subnet mask of thenetwork
- D. Connection latency
- E. DNS suffix
- F. Wireless signal strength
正解：C、D
解説：
By running the specified tests (ping of the default gateway, ping of the localhost, and tracert of the IP address of the default gateway), the technician can find connection latency and the subnet mask of the network.
* Connection latency: The time it takes for a ping or tracert command to send and receive a response
* helps in determining the latency in the network connection. Higher latency values can indicate delays in communication over the network.
* Subnet mask of the network: The ipconfig command, which the technician would initially run to perform these tests, provides various details about the network configuration, including the subnet mask.
The subnet mask is essential in determining the network and host portions of an IP address, which is crucial for networking and troubleshooting connectivity issues.
References:
* CompTIA A+ Core 1 (220-1101) Exam Objectives, specifically sections dealing with troubleshooting network connectivity issues and understanding network configurations, including the use of diagnostic commands like ping and tracert.
* Networking fundamentals, which explain the purpose and use of diagnostic tools such as ping (to measure latency) and ipconfig (to view IP configuration details including the subnet mask).
質問 # 174
A user attempts to connect a laptop to a projector but receives the following message from the projector: Out of Range. Which of the following needs to be addressed first?
- A. Verify that the laptop video card driver is the most up-to-date version.
- B. Check the video cable and replace it if necessary.
- C. Set the computer's display settings to extend/duplicate.
- D. Change the resolution settings.
正解：D
解説：
Explanation
The most likely answer is A. Change the resolution settings.
The error "Out of Range" normally means that the resolution being output by the computer is not compatible with the projector. The resolution is the number of pixels that are displayed on the screen. If the resolution is too high for the projector, it may not be able to display the image correctly or at all12.
To resolve this issue, you should try lowering the resolution settings on your laptop to match the native resolution of the projector or a lower one. You can do this by following these steps1:
*Right-click on an empty area of your desktop and select Display settings.
*Under Scale and layout, click on Display resolution and choose a lower option from the drop-down menu.
*Click Apply and then Keep changes.
*Reconnect your laptop to the projector and check if the image is displayed properly.
If changing the resolution settings does not help, you may need to check other factors, such as the video cable, the display settings, or the video card driver. However, these are less likely to cause the "Out of Range" error than the resolution settings.
質問 # 175
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