[2024年03月] ベストA+学習ガイドは220-1101試験問題集
220-1101認定ガイド問題と解答トレーニング
質問 # 277
A technician is diagnosing a workstation that shuts down unexpectedly during a butn-in test. Which of the following is the MOST likely cause for this symptom?
- A. Faulty CMOS battery
- B. Faulty RAM
- C. OS update issue
- D. Overheating
正解：D
解説：
Explanation
If a workstation shuts down unexpectedly during a burn-in test, overheating is the most likely cause. This is because a burn-in test is designed to stress the components of the workstation, which can generate a lot of heat. Therefore, overheating is the correct answer. References: CompTIA A+ Certification Exam Guide, Ninth Edition, page 120
質問 # 278
A user sends a print job lo a network printer, and the print job uses double the amount of paper as expected.
Which of the following should the user configure to get the expected result?
- A. Transparency
- B. Duplex
- C. Landscape
- D. Collate
正解：B
質問 # 279
A technician attempts to join a Windows client to a domain but receives the following error:
An attempt to resolve the hostname has failed.
The technician generates the display shown below utilizing ipconfig /all.
Which of the following is the most likely reason for the error?
- A. DNS
- B. Subnet mask
- C. Default gateway
- D. IPv4 address
- E. Physical address
正解：A
解説：
Explanation
The most likely reason for the error is that the DNS server is not configured correctly. The technician should check the DNS server settings and make sure they are correct.
DNS, or Domain Name System, is a service that translates domain names, such as www.example.com, into IP addresses, such as 192.168.1.1, that computers use to communicate with each other. DNS is essential for joining a Windows client to a domain, which is a logical group of computers that share a common directory and security policy. A domain name, such as example.com, identifies the domain and its members on the network.
To join a Windows client to a domain, the client needs to resolve the hostname of the domain controller, which is the server that manages the domain and its resources. The client sends a DNS query to the DNS server, asking for the IP address of the domain controller. The DNS server responds with the IP address, and the client uses it to establish a connection with the domain controller and complete the domain join process.
However, if the DNS server is not configured correctly, the client may not be able to resolve the hostname of the domain controller, and receive the error: An attempt to resolve the hostname has failed. This can happen if the DNS server is not reachable, not authoritative, or not updated. For example, the DNS server may have an incorrect IP address, a wrong DNS suffix, a missing or outdated DNS record, or a firewall blocking the DNS traffic.
To fix the error, the technician should verify that the DNS server settings on the client and the domain controller are correct and consistent. The technician can use the ipconfig /all command to display the DNS server settings, such as the IPv4 address, the subnet mask, the default gateway, and the DNS suffix. The technician can also use the nslookup command to test the DNS resolution and the ping command to test the connectivity. The technician should make sure that the client and the domain controller are using the same DNS server, and that the DNS server can resolve the hostname of the domain controller.
References:
How to Resolve the "Temporary failure in name resolution" Error1
Strict hostname resolution configured but no hostname was set2
Error: Hostname Not Resolved to an IP Address - HostGator3
The Host Name Could Not be Resolved in DNS4
Troubleshoot DNS name resolution on the Internet - Windows Server5
質問 # 280
A user needs to connect a laptop to the internet while traveling on a train. Which of the following features should be enabled on the user's phone?
- A. Roaming
- B. Hotspot
- C. Near-field communication
- D. Bluetooth
正解：B
解説：
Explanation
A hotspot is a feature that allows a phone to share its cellular data connection with other devices via Wi-Fi, Bluetooth, or USB. This can be useful when traveling on a train, where Wi-Fi networks may not be available or reliable. A hotspot can provide internet access to a laptop or other devices that need to connect to the web.
Bluetooth is a wireless technology that allows devices to communicate over short distances, usually within 10 meters. It can be used to pair devices such as headphones, speakers, keyboards, mice, etc. However, it cannot be used to share internet access from a phone to a laptop.
Near-field communication (NFC) is a wireless technology that allows devices to exchange data by touching or bringing them close together, usually within 4 cm. It can be used for applications such as contactless payments, smart cards, digital tickets, etc. However, it cannot be used to share internet access from a phone to a laptop.
Roaming is a feature that allows a phone to use another carrier's network when the home network is not available. This can be useful when traveling abroad, where the home network may not have coverage or agreements with local operators. However, roaming can incur additional charges and may not provide the same speed or quality of service as the home network. Roaming does not affect the ability of the phone to share internet access with other devices via hotspot.
質問 # 281
A user requested upgrades to a company-issued laptop to increase its performance while working with a large database stored on drive C. Which of the following tasks should a systems administrator complete to BEST meet this goal? (Select TWO).
- A. Upgrade to 1GB NIC.
- B. Install a hybrid drive.
- C. Upgrade the power supply.
- D. Migrate to a SSD.
- E. Increase the RAM.
- F. Configure RAID 1.
正解：B、E
解説：
CompTIA covers it in page 97 of the comptia A+ complete study guide.
質問 # 282
Which of the following protocols provides the fastest bandwidth?
- A. 802.11ax
- B. 802.11n
- C. 802.11ac
- D. 802.11a
正解：A
解説：
The 802.11ax protocol, also known as Wi-Fi 6, provides the fastest bandwidth among the options listed. It can achieve up to 10 Gbps of data transfer rate, using technologies such as OFDMA, MU-MIMO, and 1024-QAM. The 802.11ac protocol, or Wi-Fi 5, is the second fastest, with a maximum of 3.46 Gbps, followed by the 802.11n protocol, or Wi-Fi 4, with a maximum of 600 Mbps. The 802.11a protocol is the slowest, with a maximum of 54 Mbps
https://www.lifewire.com/wireless-standards-802-11a-802-11b-g-n-and-802-11ac-816553
質問 # 283
A technician needs to determine where a printer is connected on a patch panel. Which of the following is the best tool for the technician to use tolocate the port?
- A. Toner probe
- B. Cable tester
- C. Wi-Fi analyzer
- D. Loopback plug
正解：A
解説：
The correct answer is A. Toner probe.
A toner probe is an electronic test instrument that can help trace wires and locate the port where a printer is connected on a patch panel. A toner probe consists of two parts: a tone generator and a tone detector. The tone generator sends a signal through the cable, and the tone detector picks up the signal at the other end. By using a toner probe, a technician can identify which port on the patch panel corresponds to the printer cable.
A loopback plug is a device that can test the functionality of a network port by sending and receiving signals from the same port. A loopback plug is not useful for locating ports on a patch panel.
A cable tester is a device that can verify the integrity and continuity of a cable by checking for open, short, or miswired connections. A cable tester can also measure the length and resistance of a cable. A cable tester is not useful for locating ports on a patch panel.
A Wi-Fi analyzer is a software or hardware tool that can monitor and analyze wireless networks by scanning for available channels, signal strength, security settings, and other parameters. A Wi-Fi analyzer is not useful for locating ports on a patch panel.
質問 # 284
Which of the following best describes the type of cloud a healthcare company should use for a patient record portal?
- A. Community
- B. public
- C. Hybrid
- D. Private
正解：D
解説：
Explanation
A patient record portal is a web-based application that allows patients to access their health information, such as medical history, test results, prescriptions, and appointments. A patient record portal needs to be secure, reliable, and compliant with the health data regulations of the country or region where it operates1.
The type of cloud that best describes the type of cloud a healthcare company should use for a patient record portal is D. Private. A private cloud is a cloud computing model that is dedicated to a single organization and provides exclusive access and control over its resources and data2. A private cloud can offer the following benefits for a patient record portal:
Enhanced security and privacy: A private cloud can protect the sensitive health data from unauthorized access or breaches by using encryption, firewalls, authentication, and other security measures. A private cloud can also comply with the health data regulations, such as HIPAA in the US or GDPR in the EU, by ensuring that the data is stored and processed within the jurisdiction of the organization3.
Improved performance and reliability: A private cloud can optimize the speed and availability of the patient record portal by using dedicated servers, network bandwidth, and storage capacity. A private cloud can also ensure that the patient record portal can handle high demand and traffic without compromising its quality or functionality3.
Greater customization and flexibility: A private cloud can tailor the patient record portal to the specific needs and preferences of the organization and its patients by using customized applications, interfaces, and features. A private cloud can also scale up or down the resources and services of the patient record portal as needed without affecting its performance or cost3.
質問 # 285
A user reports that a printer pulls multiple sheets of paper from the paper tray instead of a single sheet. Which of the following should a technician investigate to resolve this issue? (Select two).
- A. Duplexer
- B. Tractor feed
- C. Separation pad
- D. Fuser
- E. Pickup roller
- F. Toner cartridge
正解：C、E
解説：
Explanation
The correct answers are C. Pickup roller and D. Separation pad.
A pickup roller is a rubber wheel that grabs the paper from the paper tray and feeds it into the printer. A separation pad is a small piece of cork or rubber that prevents more than one sheet of paper from being fed at a time. If the pickup roller or the separation pad is worn out, dirty, or damaged, it can cause the printer to pull multiple sheets of paper instead of a single sheet. This can lead to paper jams, misprints, or wasted paper.
To resolve this issue, a technician should investigate the condition of the pickup roller and the separation pad and replace them if necessary. The technician should also clean the paper tray and make sure the paper is loaded correctly and not stuck together.
A toner cartridge is a component that contains the toner powder used to create the printout on a laser printer. A tractor feed is a mechanism that uses sprockets to move continuous paper through a dot matrix printer. A duplexer is a device that allows a printer to print on both sides of the paper automatically. A fuser is a part of a laser printer that melts the toner onto the paper using heat and pressure. None of these components are related to the issue of pulling multiple sheets of paper from the paper tray.
Reference: Types of Printers-What You Need to Know for the CompTIA A+ Exams
質問 # 286
A network technician needs to connect into the console of a switch. Which of the following connection types should the technician most likely utilize?
- A. Serial interface
- B. Near-field communication
- C. Port replicator
- D. Bluetooth
正解：A
解説：
A serial interface is a common way to connect to the console port of a switch using a rollover cable and a terminal emulator program. This allows the network technician to configure and troubleshoot the switch. Bluetooth, near-field communication, and port replicator are not used for console connections.
質問 # 287
A customer has contacted you about building two new desktops. The first desktop will be a gaming workstation. The customer requirements include:
Playing the newest games at a high frame rate
Fast game load times
Enough storage to have several games installed at once
High-end audio
No concern about cost
Running the current Windows OS
The second workstation will be a family workstation. The requirements include:
Capability for word processing, videoconferencing, and basic web surfing Minimal cost, as long as it meets the requirements Running the current Windows OS
正解：
解説：
質問 # 288
A user's touch-screen tablet is having an issue with the screen orientation. Which of the following is MOST likely causing this issue?
- A. The screen rotation is locked
- B. The inverter is misconfigured
- C. The screen protector on the tablet is damaged
- D. The touch-screen digitizer is malfunctioning
正解：A
質問 # 289
Which of the following scenarios best illustrate a need for VDI? (Select two).
- A. A company that needs to store IOPB worth of data
- B. An application developer who needs to configure network settings for an application
- C. A payment processor that is planning on implementing virtual currency
- D. A manufacturing plant that has high turnover
- E. A bank that has security concerns regarding employee activity
- F. An IT engineer who is designing and showcasing organization user experiences for multiple clients
正解：E、F
解説：
Explanation
The scenarios that best illustrate a need for VDI are A and D.
VDI can provide several benefits for different use cases, such as:
Enhancing security and compliance by centralizing and encrypting data and applications on the server, rather than on the endpoint devices. This can prevent data loss, theft, or leakage, as well as reduce the risk of malware or unauthorized access. This is especially important for organizations that deal with sensitive or regulated information, such as banks, healthcare providers, or government agencies123.
Improving flexibility and mobility by allowing users to access their desktops and applications from any device, location, or network. This can enable remote work, bring your own device (BYOD) policies, or disaster recovery scenarios. This is especially useful for organizations that have distributed or mobile workforce, such as IT engineers, consultants, or sales representatives123.
Reducing costs and complexity by simplifying the management and maintenance of desktops and applications. This can lower the hardware, software, and energy expenses, as well as the IT staff workload. This is especially beneficial for organizations that have large or diverse desktop environments, such as schools, call centers, or manufacturing plants123.
Based on these benefits, the scenarios that best illustrate a need for VDI are:
A: An IT engineer who is designing and showcasing organization user experiences for multiple clients.This scenario requires flexibility and mobility, as the IT engineer needs to access different desktop environments and applications from various devices and locations. VDI can enable the IT engineer to create and switch between multiple virtual desktops on the same server, and to access them from any client device with an internet connection1.
B: A company that needs to store IOPB worth of data. This scenario does not require VDI, as VDI is not a storage solution but a desktop virtualization solution. VDI can help reduce the storage requirements of endpoint devices by storing data on the server, but it does not provide storage capacity or performance for large-scale data processing or analysis. The company may need a different type of cloud service, such as storage as a service (SaaS) or big data as a service (BDaaS), to store and manage its massive amount of data4.
C: A manufacturing plant that has high turnover. This scenario does not require VDI, as VDI is not a human resource solution but a desktop virtualization solution. VDI can help reduce the costs and complexity of managing desktops and applications for a large number of users, but it does not address the root causes of high turnover, such as low wages, poor working conditions, or lack of training. The manufacturing plant may need to improve its human resource policies and practices to retain its employees.
D: A bank that has security concerns regarding employee activity. This scenario requires security and compliance, as the bank needs to protect its data and applications from internal and external threats. VDI can enhance the security of the bank's desktop environment by storing and encrypting all data and applications on the server, rather than on the endpoint devices. VDI can also provide granular control and monitoring of user access and activity2.The scenarios that do not illustrate a need for VDI are:
E: A payment processor that is planning on implementing virtual currency. This scenario does not require VDI, as VDI is not a payment solution but a desktop virtualization solution. VDI can help improve the security and flexibility of accessing desktops and applications over the internet, but it does not provide the functionality or compatibility for processing virtual currency transactions. The payment processor may need a different type of cloud service, such as blockchain as a service (BaaS) or cryptocurrency as a service (CaaS), to implement and manage its virtual currency platform.
F: An application developer who needs to configure network settings for an application. This scenario does not require VDI, as VDI is not a development solution but a desktop virtualization solution. VDI can help provide different desktop environments and applications for testing purposes, but it does not provide the tools or resources for developing or configuring applications. The application developer may need a different type of cloud service, such as platform as a service (PaaS) or software development as a service (SDaaS), to create and deploy applications.
質問 # 290
A technician is troubleshooting a PC that has been experiencing random system crashes. The technician has already checked the hard drive and the RAM, and both were in good working order. Which of the following steps should the technician take next to troubleshoot the system crashes?
- A. Disable the USB ports
- B. Test the fan speed.
- C. Decrease the RAM timings.
- D. Replace the PSU
正解：D
解説：
A PSU (power supply unit) is a component that converts the AC power from the wall outlet into DC power that the PC components can use. A faulty or failing PSU can cause random system crashes, as well as other problems such as noise, overheating, or no power at all. A PSU can fail due to various reasons, such as age, dust, power surges, or poor quality.
To troubleshoot a PSU, the technician can use a multimeter to measure the voltage output of the PSU connectors. The voltage should be within the acceptable range of the specifications. For example, the 12V rail should be between 11.4V and 12.6V. If the voltage is too low or too high, the PSU is likely defective and needs to be replaced.
Alternatively, the technician can try swapping the PSU with a known good one and see if the system crashes persist. If the system works fine with a different PSU, then the original PSU is the problem and should be replaced.
The other options are not likely to fix the random system crashes. Testing the fan speed may help to diagnose overheating issues, but it is not related to the PSU. Disabling the USB ports may help to eliminate potential conflicts with USB devices, but it is not related to the PSU. Decreasing the RAM timings may help to improve performance and stability, but it is not related to the PSU.
Reference:
Fix Random PC Crashes: 10 Steps to Identify and Fix Issues
Why Does Windows Crash? The 9 Most Common Reasons
質問 # 291
A technician receives several error alerts on a server after an unexpected reboot. A message states that one or more disks are in a degraded state. When the technician advances to the next error message, it indicates the OS is missing. Which of the following are the MOST likely causes of these errors? (Choose two.)
- A. Data loss
- B. Bootable device not found
- C. TPM malfunction
- D. Controller failure
- E. CMOS corruption
- F. Missing drives in the OS
- G. RAID failure
正解：B、G
解説：
Explanation
The message stating that one or more disks are in a degraded state is a clear indication of a RAID failure.
RAID stands for Redundant Array of Independent Disks, and it is a technology used to provide fault tolerance and improve performance by combining multiple hard drives into a single logical unit.
The message indicating that the OS is missing is most likely caused by a bootable device not found. This means that the server is unable to boot from the designated boot device, which could be the hard drive, a CD/DVD drive, or a USB flash drive. This could be caused by a faulty boot device, a loose cable, or a misconfiguration in the BIOS or UEFI settings.
質問 # 292
Using the output below:
Which of the following is the default gateway?
- A. 255.255.255.0
- B. 172.25.1.39
- C. 172.25.1.252
- D. 172.25.1.4
正解：C
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 # 293
Which of the following is considered a connectionless protocol?
- A. HTTPS
- B. TCP
- C. UDP
- D. SSH
正解：C
解説：
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 # 294
A desktop support technician is tasked with upgrading a laptop so that it has the fastest data access possible. Which of the following BEST satisfies this requirement?
- A. 2.5SASHHD
- B. 2.5SATASSD
- C. 2 NVMe SSD provides the fastest data access possible for a laptop. It is a high-performance solid-state drive that connects directly to the motherboard through an M.2 slot.
- D. mSATASSD
- E. M.2NVMeSSD
正解：E
質問 # 295
Which of the following devices is capable of dynamically distributing an IP address?
- A. Router
- B. Switch
- C. Injector
- D. Hub
正解：A
解説：
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).
質問 # 296
A user reboots a machine. On rebooting, the user hears one beep, and then an error message is displayed. Which of the following are MOST likely causing this issue? (Select TWO).
- A. RAM module
- B. CPU
- C. Boot order
- D. USB flash drive
- E. Power supply
- F. Graphics card
正解：A、B
質問 # 297
A new employee has been issued a company laptop. The employee requests an accessory with a single power source that has wired network connectivity and supports a keyboard, mouse, speakers, and dual monitors.
Which of the following accessories should the systems administrator deploy to BEST meet the new user's needs?
- A. PoE switch
- B. USB-C hub with power delivery
- C. KVM switch with audio
- D. Docking station with DisplayPort
正解：D
解説：
Explanation
A docking station is a hardware accessory that allows laptops to connect to multiple peripherals and devices with a single connection. A docking station with DisplayPort would provide the necessary connectivity for the dual monitors, and it can also support the required peripherals such as the keyboard, mouse, and speakers. In addition, it will provide a wired network connectivity for faster and more reliable network access.
質問 # 298
A user's computer is not receiving a network connection. The technician confirms that the connection seems to be down and looks for the user's port on the patch panel. The port and patch panel are not labeled. Which of the following network tools should the technician use to identify the port?
- A. Toner probe
- B. Network tap
- C. Punchdown tool
- D. Crimper
正解：A
解説：
Toner Probe Many cable testers also incorporate the function of a toner probe, which is used to identify a cable from within a bundle. This may be necessary when the cables have not been labeled properly. The tone generator is connected to the cable using an RJ45 jack and applies a continuous audio signal on the cable. The probe is used to detect the signal and follow the cable over ceilings and through ducts or identify it from within the rest of the bundle.
質問 # 299
A user sends a print job lo a network printer, and the print job uses double the amount of paper as expected.
Which of the following should the user configure to get the expected result?
- A. Transparency
- B. Duplex
- C. Landscape
- D. Collate
正解：B
解説：
Explanation
The user should configure the print job to use the Duplex option, which will print on both sides of the paper and reduce the amount of paper used.
質問 # 300
A technician needs to install a printer on the network. Which of the following must the technician configure?
(Select THREE).
- A. IP address
- B. MAC address
- C. Dots per inch
- D. Drivers
- E. Gateway
- F. PCL
- G. Subnet mask
- H. MB
正解：B、D、F
質問 # 301
A user needs to transfer files from an Apple phone to a workstation. Which of the following connection types should the user utilize?
- A. NFC
- B. Serial
- C. Lightning
- D. USB-C
正解：C
解説：
Explanation
Lightning is a proprietary connection type that is used by Apple devices, such as iPhones, iPads, and iPods, to transfer data, charge, and connect to accessories. Lightning cables have a reversible 8-pin connector that can be plugged into a USB port on a workstation or a power adapter. USB-C, serial, and NFC are not compatible with Apple phones.
質問 # 302
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CompTIA A+ 認定試験：コア1は、コンピュータハードウェア、ソフトウェア、ネットワーキング、およびセキュリティに関連する幅広いトピックをカバーしています。この試験では、コンピュータのコンポーネント、周辺機器、モバイルデバイス、オペレーティングシステム、仮想化、クラウドコンピューティング、およびネットワークプロトコルに関する理解をテストします。さらに、脅威緩和、アクセス制御、およびインシデント対応などの基本的なサイバーセキュリティコンセプトもカバーしています。
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