220-1101無料認定試験材料はこちらの692問題
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質問 # 161
Which of the following utilizes TCP ports 20/21 and transfers data in cleartext?
- A. SSH
- B. FTP
- C. SNMP
- D. Telnet
正解：B
解説：
FTP (File Transfer Protocol) uses TCP ports 20/21 and transfers data in cleartext, which means the data is not encrypted and can be read by anyone who intercepts it. This makes FTP insecure for transferring sensitive information. SSH (Secure Shell), on the other hand, uses port 22 and encrypts data, making it more secure. SNMP (Simple Network Management Protocol) uses ports 161/162 and is used to monitor network devices. Telnet uses port 23 and transfers data in cleartext, making it insecure. Reference: CompTIA A+ Certification Exam: Core 1 - Page 199
質問 # 162
A user is unable to access the internet on a PC. A technician examines the PC and runs the following commands:
Which of the following steps in the troubleshooting process does this series of commands represent?
- A. Verify full system functionality.
- B. Establish a theory.
- C. Establish a plan of action.
- D. Identify the problem.
正解：A
質問 # 163
A user on the marketing team uses various multimedia applications that consume a lot of memory. The user needs to install more RAM to run these applications effectively. When the user opens the computer case, the user sees four slots in two sets of colors. Which of the following memory types is MOST likely required?
- A. Triple-channel
- B. Quad-channel
- C. Error correction code RAM
- D. Dual-channel
- E. Single-channel
正解：D
解説：
Explanation
The two sets of colors on the motherboard indicate that it supports dual-channel memory, which doubles the bandwidth available to the memory controller. Dual-channel memory requires two identical memory modules to be installed in pairs in the correct slots to work effectively. In this case, the user can install two identical RAM modules to enable dual-channel memory, which will provide better performance when using multimedia applications that consume a lot of memory.
質問 # 164
Using the output below:
Which of the following is the default gateway?
- A. 172.25.1.4
- B. 255.255.255.0
- C. 172.25.1.39
- D. 172.25.1.252
正解：D
解説：
Explanation
The default gateway is the IP address of the router or device that connects a network to another network or the internet. In the output below, the default gateway is 172.25.1.252, as shown in the line "Default Gateway . . . .
. . . . . : 172.25.1.252". The other IP addresses are not default gateways, but either local IP addresses (172.25.1.39 and 172.25.1.4) or subnet masks (255.255.255.0).
質問 # 165
Which of the following models is an example of metered utilization?
- A. Multitenant
- B. Pay-as-you-go
- C. Reserved instance
- D. Subscription-based
正解：B
解説：
Explanation
Metered utilization is a pricing model for cloud computing services, where the customer pays only for the amount of resources that are consumed, such as CPU time, memory, storage, bandwidth, etc. The customer is billed based on the actual usage of the resources, rather than a fixed or upfront fee. Metered utilization is also known as usage-based pricing or pay-per-use12.
Pay-as-you-go is an example of metered utilization, where the customer pays for the cloud resources on demand, without any long-term commitment or contract. The customer can scale up or down the resources as needed, and only pay for what is used. Pay-as-you-go is a flexible and cost-effective option for customers who have unpredictable or variable workloads, or who want to try out new services or features12.
The other options are not examples of metered utilization. Reserved instance is a pricing model where the customer pays a discounted rate for a fixed amount of cloud resources for a specified period of time, such as one or three years. The customer can reserve the resources in advance, and benefit from lower costs and guaranteed availability. Reserved instance is suitable for customers who have predictable or steady workloads, or who want to optimize their budget12.
Subscription-based is a pricing model where the customer pays a fixed fee for a set of cloud services or features for a certain period of time, such as monthly or annually. The customer can access the services or features as much as needed, without worrying about the usage or consumption of the resources. Subscription-based is suitable for customers who want to have a consistent and predictable cost, or who want to access premium or exclusive services or features12.
Multitenant is not a pricing model, but a cloud architecture where multiple customers share the same physical or virtual resources, such as servers, databases, applications, etc. The resources are isolated and secured for each customer, and the customers can benefit from lower costs, higher scalability, and faster updates. Multitenant is a common characteristic of public cloud services, where the cloud provider manages and maintains the resources for the customers12.
References:
CompTIA A+ Core 1 (220-1101) Certification Study Guide, Chapter 4: Cloud Computing and Virtualization, Section 4.2: Cloud Computing Concepts, Page 261 CompTIA A+ Core 1 (220-1101) and Core 2 (220-1102) Exam Cram, Chapter 6: Cloud Computing and Virtualization, Section 6.2: Cloud Computing Concepts, Page 241
質問 # 166
A user creates a support ticket to report a conference room projector that does not work. The user says that even though the provided cables are being used, the projector screen shows the following error message:
No signal input
Which of the following describes the FIRST action that should be taken?
- A. Verify that the user is using an approved OS.
- B. Check the video cable and replace it if necessary.
- C. Replace the projector bulb.
- D. Verify that the projector is turned on.
正解：B
解説：
Explanation
The most common reasons you may be seeing the "No Signal" message: The projector and the source device are not connected correctly.
The first action should be to check the video cable and replace it if necessary, as the error message suggests that the projector is not receiving a signal from the laptop. Verifying that the projector is turned on and checking the bulb would come after verifying the video cable.
質問 # 167
A user wants a second monitor installed on a laptop. The VGA/DVI or HDMI cables have already been connected. Which of the following should the technician do to configure the laptop to show both screens?
- A. Plug in the monitor to the USB port.
- B. Adjust the monitor display settings.
- C. Power cycle the laptop.
- D. Power cycle the monitor.
正解：B
解説：
Explanation
To configure the laptop to show both screens, the technician should adjust the monitor display settings. On Windows 10 or 11, the technician can select the Start menu, then open Settings, then select Display. The PC should automatically detect the monitors and show the desktop. If the monitors are not detected, the technician can select Multiple displays, then Detect. The technician can then use the dropdown list next to the image of the desktop to choose how the screen will project across the displays12345.
質問 # 168
An administrator notices that on an intermittent basis the virtual machines are running slowly. The virtual machines are correctly sized, and the hardware has enough free resources to cope with demand Which of the following is most likely the cause?
- A. The physical servers are contending for resources
- B. The physical servers do not have enough network bandwidth.
- C. The physical servers are throttling due to overheating
- D. The physical servers are not able to draw enough power
正解：C
解説：
The physical servers are throttling due to overheating. This means that the servers are reducing their performance to prevent damage from excessive heat. This can cause the virtual machines to run slowly, as they depend on the physical servers' resources. To avoid this, the servers need adequate cooling and ventilation, as well as monitoring of their temperature and fan speed. According to the CompTIA Core1 objectives, one of the environmental factors that can affect system performance is overheating. A research paper on thermal management of servers also states that overheating can lead to performance degradation, reliability issues, and energy inefficiency.
質問 # 169
Using the output below:
Which of the following is the default gateway?
- A. 172.25.1.4
- B. 255.255.255.0
- C. 172.25.1.39
- D. 172.25.1.252
正解：D
解説：
The default gateway is the IP address of the router or device that connects a network to another network or the internet. In the output below, the default gateway is 172.25.1.252, as shown in the line "Default Gateway . . . .
. . . . . : 172.25.1.252". The other IP addresses are not default gateways, but either local IP addresses (172.25.1.39 and 172.25.1.4) or subnet masks (255.255.255.0).
質問 # 170
Following a scheduled power outage, users report they cannot access the local intranet. A technician is able to ping the IP address of the server that is hosting the website. Which of the following serves is MOST likely offline?
- A. DNS
- B. File
- C. Web
- D. DHCP
正解：A
解説：
Explanation
DNS stands for Domain Name System and is a service that translates domain names (such as www.example.com) into IP addresses (such as 192.168.1.100) that computers can use to communicate over a network. If the DNS server is offline, users may not be able to access websites or other network resources by using their domain names, even if they are online and reachable by their IP addresses. The technician should check if the DNS server is running and configured correctly, or use an alternative DNS server if possible.
Reference: https://www.comptia.org/training/books/a-core-1-220-1101-study-guide (page 81)
質問 # 171
Which of the following should a technician use to terminate an RJ45 port?
- A. Toner probe
- B. Cable stripper
- C. Cable tester
- D. Punchdown tool
正解：D
解説：
To terminate an RJ45 port, a technician should use a punchdown tool. This tool is specifically designed to insert and cut (terminate) the wires into a patch panel, keystone jack, or a network surface mount box. The punchdown tool ensures that the wire is properly seated in the terminal block and that the connection is secure. It also trims the excess wire during the termination process, which is not a function that cable testers, toner probes, or cable strippers are designed to perform.
References:
* CompTIA A+ Certification Core 1 220-1101 study materials and learning resources1.
* Networking tools and best practices for hardware and device management as covered in the CompTIA A+ certification guidelines
質問 # 172
A company laptop uses a docking station with an integrated NIC and is unable to access a wired SOHO network using DHCP. A technician runs ipconfig anddiscovers the laptop has an IPv4 assignment of 169.254.0.9. The NIC does not have any link or activity lights on. Which of the following should the technician do next?
- A. Replace the laptop.
- B. Reboot the DHCP server.
- C. Restart the laptop in safe mode.
- D. Reset the network adapter.
- E. Reseat the laptop in the docking station.
正解：E
解説：
The most likely answer is E. Reseat the laptop in the docking station.
The IPv4 address of 169.254.0.9 indicates that the laptop is using an Automatic Private IP Address (APIPA), which means that it could not obtain a valid IP address from the DHCP server on the network1. This could be caused by a physical or logical problem with the network adapter, the cable, the docking station, or the network itself2.
One of the possible solutions is to reseat the laptop in the docking station, which means to remove it and insert it again, making sure that it is properly aligned and connected. This can help fix any loose or faulty connections between the laptop and the docking station, and between the docking station and the network cable3. Reseating the laptop can also trigger a new DHCP request and renew the IP address4.
Other possible solutions include resetting the network adapter, replacing the network cable, rebooting the DHCP server, or restarting the laptop in safe mode. However, these are less likely to be effective than reseating the laptop, as they involve more steps and may not address the root cause of the problem234. Replacing the laptop is an extreme and unnecessary measure, as there is no evidence that the laptop itself is faulty.
質問 # 173
Which of the following is the MAXIMUM power PoE+ provides?
- A. 95W
- B. 60W
- C. 15.4W
- D. 30W
正解：D
解説：
Explanation
The earliest PoE switches from a few years ago generated 15 Watts per port (IEEE 802.3af). Today, most use the PoE+ standard (IEEE 802.3at), which generates up to 30 Watts per port. That's plenty for most devices that people want to connect
質問 # 174
A user reports a cell phone is getting hot. Which of the following are MOST likely to be possible causes? (Select THREE).
- A. A failing battery
- B. Granting too many application camera permissions
- C. Too many open applications
- D. Less than 15% free storage space on the phone
- E. Recurring prompts to install OS updates
- F. Privileged control
- G. Using the device as a Wi-Fi hotspot
- H. A cracked screen
正解：A、C、G
質問 # 175
An integrated webcam on a user's laptop broke, so a technician installed a temporary, external webcam. Since the external webcam installation, other users can only see part of the user's face during videoconferences. Which of the following BEST describes the reason for this issue?
- A. The webcam driver should be updated.
- B. The webcam is not compatible with the OS.
- C. The webcam is plugged into the wrong USB port.
- D. The webcam is not on a level surface.
正解：D
解説：
The most likely reason for the issue is that the webcam is not on a level surface, which causes the camera angle to be distorted. The user should adjust the position of the webcam so that it is aligned with the laptop screen and captures the user's face fully. The other options are not relevant to this issue, as they would not affect the camera angle or visibility of the user's face. Verified Reference: How to Position Your Webcam Correctly.
質問 # 176
A technician needs to increase the available RAM on a virtual workstation. Which of the following should the technician do?
- A. Upgrade to the latest DDR5 modules.
- B. Increase the ECC memory timings in the BIOS.
- C. Use a hypervisor to adjust the resource allocation.
- D. Clear the temporary files on the workstation's boot drive.
正解：C
解説：
A hypervisor is a software layer that manages and allocates resources for virtual machines (VMs) on a physical host machine. A technician can use a hypervisor to adjust the resource allocation for a virtual workstation, such as increasing the amount of RAM assigned to it from the available pool of memory on the host machine. This can improve the performance and functionality of the virtual workstation without requiring any hardware changes or modifications. Reference: https://www.comptia.org/training/books/a-core-
1-220-1101-study-guide (page 59)
質問 # 177
A technician is trying to set up a computer to dual boot from both Windows and Linux. The technician believes that a setting is preventing the computer from accessing the flash drive with the OS image prior to loading the OS. Which of the following settings should the technician check?
- A. TPM
- B. UEFI
- C. PXE
- D. ACL
正解：B
解説：
The Unified Extensible Firmware Interface (UEFI) is the setting that should be checked when a computer is not booting from a flash drive containing an OS image. UEFI is a modern firmware that replaces the traditional BIOS and includes a "Secure Boot" feature that can prevent unauthorized operating systems from loading during the system's boot process. This security feature might be the reason the computer cannot access the flash drive before loading the OS. Disabling Secure Boot or adjusting the boot order within the UEFI settings can allow the system to boot from the flash drive. This is supported by the CompTIA A+ Core 1 (220-1101) Exam Objectives, particularly in sections 1.4 "Given a scenario set up and configure accessories and ports of mobile devices" and 4.0 "Virtualization and Cloud Computing", emphasizing the importance of UEFI settings in boot processes and virtualization .
質問 # 178
Which of the following DNS records is used to point to a mail server?
- A. TXT
- B. MX
- C. A
- D. AAA
正解：B
解説：
An MX (Mail Exchange) record in DNS specifies the mail server responsible for accepting email messages on behalf of a domain. It is a vital component of the email delivery process, directing email to the correct server based on the domain part of the email address. Without properly configured MX records, a domain's email system cannot function correctly.
質問 # 179
Which of the following network options would work BEST to ensure a client-side virtual machine cannot access the rest of the network?
- A. NAT mode
- B. Host-only mode
- C. Direct mode
- D. Bridge mode
正解：B
解説：
Host-only mode is a network option that isolates a client-side virtual machine from the rest of the network. It allows the virtual machine to communicate only with the host machine and other virtual machines on the same host. NAT mode allows the virtual machine to share the host's IP address and access the network through it. Bridge mode allows the virtual machine to have its own IP address and connect directly to the network. Direct mode is not a valid network option for virtual machines.
質問 # 180
Which of the following would MOST likely be used to obtain electronic images of a large number of printed documents?
- A. ADF/flatbed scanner
- B. QR scanner
- C. Camera/webcam
- D. NFC device
正解：A
質問 # 181
A user reports the following:
1. When accessing large images, PC performance is degraded.
2. When accessing small text files, PC performance is as expected.
Which of the following is the most likely cause of the performance issues?
- A. RAID controller failure
- B. Insufficient power supply
- C. HDD fragmentation
- D. RAID array configuration errors
正解：C
解説：
HDD fragmentation is a condition where the data on a hard disk drive (HDD) is not stored in contiguous clusters, but scattered across different physical locations on the disk. This happens when files are created, modified, or deleted over time, leaving gaps and fragments of data on the disk. HDD fragmentation can affect the performance of the PC, especially when accessing large files that require more disk operations to read or write12.
According to some web search results123, some signs and symptoms of a heavily fragmented HDD are:
* Longer load times for files and programs
* Graphics-heavy apps and games take too long to load new windows or process new environments
* Reduced disk space and efficiency
* Increased disk noise and temperature
* Accelerated disk wear and failure
To fix this issue, the user can use a tool called Disk Defragmenter, which is built-in in Windows. Disk Defragmenter rearranges the fragmented data on the HDD so that it is stored in contiguous clusters, improving the disk performance and reliability1. Disk Defragmenter can run on a schedule or manually by following these steps1:
* Open Disk Defragmenter by clicking the Start button. In the search box, type Disk Defragmenter, and then, in the list of results, click Disk Defragmenter.
* Under Current status, select the disk you want to defragment.
* To determine if the disk needs to be defragmented or not, click Analyze disk. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
* Once Windows is finished analyzing the disk, you can check the percentage of fragmentation on the disk in the Last Run column. If the number is above 10%, you should defragment the disk.
* Click Defragment disk. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
* Disk Defragmenter might take from several minutes to a few hours to finish, depending on the size and degree of fragmentation of your hard disk. You can still use your computer during the defragmentation process.
質問 # 182
A technician is upgrading a faulty motherboard that was ordered by an end user for an old, high-end desktop computer. However, the technician is unable to install the CPU into the socket. Upon closer inspection, the technician notices the pins on the CPU do not line up with the socket. Which of the following would be the best course of action for the technician to take NEXT?
- A. Try to set as many pins as possible.
- B. Verify the socket type and manufacturer.
- C. Install an adaptor to create a universal socket.
- D. Find a compatible motherboard for the CPU.
正解：B
解説：
In this situation, the best course of action for the technician to take NEXT would be C.
Verify the socket type and manufacturer. If the pins on the CPU do not line up with the socket on the motherboard, it is likely that there is a compatibility issue between the two components. The technician should verify that the socket type and manufacturer of the motherboard match those of the CPU to ensure that they are compatible.
質問 # 183
A technician recently installed a new printer that is being shared over the network via a 64-bit Windows Print Server Two users, who have computers with a legacy OS, are unable to print to this new printer. Which of the following should the technician do to resolve this issue?
- A. Update the computers to a 64-bit driver.
- B. Enable Print Spooler and restart the computer.
- C. Enable 32-bit drivers on the Print Server.
- D. Run Windows Update on the users' computers_
正解：C
解説：
Explanation
The correct answer is A. Enable 32-bit drivers on the Print Server.
A print server is a computer or device that manages the printing requests from multiple clients over a network.
A print server can share one or more printers with different types of clients, such as Windows, Mac, or Linux.
However, to ensure compatibility and functionality, the print server must have the appropriate drivers for each printer and each client1.
A driver is a software component that enables the communication and interaction between a device and an operating system. A driver must match the specifications and features of the device, as well as the architecture and version of the operating system. A driver that is incompatible with either the device or the operating system may cause errors, malfunctions, or performance issues2.
In this scenario, the technician installed a new printer that is being shared over the network via a 64-bit Windows Print Server. This means that the print server has a 64-bit operating system and a 64-bit driver for the printer. However, two users who have computers with a legacy OS (an older or outdated operating system) are unable to print to this new printer. This may be because their computers have a 32-bit operating system and require a 32-bit driver for the printer.
To resolve this issue, the technician should enable 32-bit drivers on the Print Server. This means that the technician should install and configure a 32-bit driver for the printer on the print server, in addition to the existing 64-bit driver. This way, the print server can support both 64-bit and 32-bit clients, and allow them to print to the same printer34.
To enable 32-bit drivers on a Windows Print Server, the technician can follow these steps4:
On the print server, open Control Panel and select Devices and Printers.
Right-click on the printer that needs a 32-bit driver and select Printer Properties.
Click on the Sharing tab and check the box that says Share this printer.
Click on Additional Drivers and check the box that says x86 (for 32-bit).
Click OK and follow the instructions to install and configure the 32-bit driver.
For more information about print servers, drivers, and compatibility issues, you can refer to the following web search results: What is a Print Server?, What is a Device Driver?, How to Install Additional Drivers for Shared Printers, How to Enable 32-Bit Drivers on Windows Server.
質問 # 184
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. Faulty NIC
- B. Misconfigured default gateway
- C. Bad network cable
- D. Incorrect IP address
正解：A
解説：
Based on the information recorded by the technician, the network connection appears to be functioning normally. The user's computer is properly configured with an IPv4 address, subnet mask, and default gateway, which should allow the user to access the internet and online videos. The high download and upload speeds and low ping time recorded from the test laptop also indicate that the network is working well. However, the user's inability to watch online videos suggests that there might be an issue with the network card (NIC) on the user's computer. The NIC might be faulty or malfunctioning, which is preventing the computer from receiving and processing the video data. The technician should try replacing the NIC to resolve the issue.
質問 # 185
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