[2025年06月05日] 365日無料更新220-1101日本語知能問題集をゲット [Q457-Q482]

[2025年06月05日] 365日無料更新220-1101日本語知能問題集をゲット

ベスト品質のCompTIA 220-1101日本語試験問題

質問 # 457
小規模倉庫での在庫追跡に使用するのに最も適切なプロトコルは次のうちどれですか?

• A. Bluetooth
• B. 近距離無線通信
• C. 無線周波数識別
• D. 802.11

正解：C

解説：
Radio-frequency identification (RFID) is the most appropriate protocol to use for inventory tracking in a small warehouse. RFID is a technology that uses radio waves to identify and track objects that have RFID tags attached to them. RFID tags are small devices that store information about the object, such as its name, serial number, location, or status. RFID tags can be passive, which means they do not have a battery and rely on the radio signal from the reader to power them, or active, which means they have a battery and can transmit their own signal. RFID readers are devices that can scan the RFID tags and read the information stored on them.

質問 # 458
システム管理者は、システムのホストベースのファイアウォールを通過する SMTP トラフィックを許可する任務を負っています。管理者は次のポートのうちどれを有効にする必要がありますか?

• A. 0
• B. 1
• C. 2
• D. 3

正解：C

解説：
SMTP (Simple Mail Transfer Protocol) uses port 25 to send email messages between servers12.
SMTP uses port 25 to send email messages between mail servers. Therefore, the system administrator should enable port 25 to allow SMTP traffic through the host-based firewall.

質問 # 459
技術者は最近、64 ビット Windows プリント サーバーを介してネットワーク上で共有されている新しいプリンタを設置しました。レガシー OS を搭載したコンピュータを所有する 2 人のユーザーは、この新しいプリンタで印刷できません。この問題を解決するために技術者が行うべきことは次のうちどれですか?

• A. ユーザーのコンピュータで Windows Update を実行します_
• B. プリント サーバーで 32 ビット ドライバーを有効にします。
• C. Print Spooler を有効にし、コンピューターを再起動します。
• D. コンピューターを 64 ビット ドライバーに更新します。

正解：B

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 # 460
ある部門ではプリンターをアップグレードしており、消耗品のコストを節約したいと考えています。次のプリンタ機能のうち、部門のコスト削減につながるものはどれですか?

• A. 丁合い
• B. 両面印刷
• C. スキャナ
• D. セキュアプリント

正解：B

解説：
Duplex printing allows printing on both sides of a paper, which can significantly reduce paper consumption and costs associated with buying paper. This makes duplex printing the best feature for cutting costs on consumables.

質問 # 461
非キャリアグレードのワイヤレス バックホールを実装しているときに、技術者は現在のチャネル選択がさまざまな RF 信号によって外部から汚染されていることに気付きました。スペクトル分析を実行すると、技術者は RF 汚染がほとんどないチャネルを発見しました。残念ながら、技術者はそのチャネルを選択できません。
この問題の原因として最も可能性が高いのは次のどれですか?

• A. チャネルはライセンスされたバンドの使用のために予約されています。
• B. チャネルはベンダーによってブロック解除される必要があります。
• C. チャンネル選択に欠陥があります。製造元にお問い合わせください。
• D. チャネルのロックを解除するには、デバイスのファームウェアを更新する必要があります。

正解：A

解説：
The 2. band is subdivided into up to 14 channels, spaced at 5 MHz intervals from 2412 MHz up to 2484 MHz.
Wi-Fi requires bandwidth of approximately 20 MHz, not 5 MHz. Consequently, a site designer needs to choose the channels that do not overlap. On a WLAN where only the first 11 channels are available, channels
1, 6, and 11 can be selected as non-overlapping. Note: In the Americas, regulations permit the use of channels
1-11 only, while in Europe, channels 1-13 are permitted. In Japan, all 14 channels are permitted.

質問 # 462
ユーザーは PC をアップグレードするためにハード ドライブを調査し、NVMe ドライブを購入することにしました。購入する前にユーザーが PC で利用できることを確認する必要があるのは次のうちどれですか? (2 つ選択してください)。

• A. SATA
• B. DRAM
• C. SCSI
• D. PCIe
• E. M.2
• F. SAS

正解：D、E

解説：
NVMe (Non-Volatile Memory Express) drives are high-speed solid-state drives that utilize the PCIe (Peripheral Component Interconnect Express) interface to connect to the motherboard. Before purchasing an NVMe drive, the user should confirm that the PC has an available M.2 slot for the drive and that the PC has a PCIe interface for the M.2 slot.
SATA (Serial ATA) is an older interface for hard drives and is not compatible with NVMe drives. SAS (Serial Attached SCSI) is a newer interface for hard drives and is typically used for enterprise-level storage systems. SCSI (Small Computer System Interface) is a parallel interface for hard drives that is primarily used in high-end workstations and servers. DRAM (Dynamic Random Access Memory) is a type of memory commonly used in computers, but it is not relevant to the storage of data on a hard drive.
Reference: CompTIA A+ Core 1 Exam Guide, page 267.

質問 # 463
自然災害が発生し、開発チームのストレージ システムが回復不能になりました。技術者は、複数の仮想マシンをサポートできるハイパーバイザーを含む交換用ストレージ アレイを準備しています。2 つの独立したベイが使用可能であり、両方を使用する必要があります。
プライマリ アレイの要件は次のとおりです。
* 拡張性は不要
* 読み取りが非常に速い
* 1つのドライブのフォールトトレランス
* 1台のドライブのみで機能する機能
* 簡単に回復可能なデータ
* 高い冗長性
* ドライブの最小数
セカンダリ アレイの要件は次のとおりです。
* 1つのドライブのフォールトトレランス
* 総スペース600G3
* 最高の書き込みパフォーマンス
* ドライブの最小数
説明書：
適切なハード ドライブをドラッグ アンド ドロップします。次に、各アレイを開いて構成を完了します。

正解：

解説：

Explanation:
Primary Array:
* Drag and drop two 120 GB SSD hard drives to the primary array bay.
* Open the primary array and select RAID 1 as the RAID level. RAID 1 provides fault tolerance of one drive, ability to function with only one drive, easily recoverable data, high redundancy, and very fast on reads. It also does not need to be scalable and uses the minimum number of drives (two) for RAID 1.
* Confirm the configuration and close the primary array.
Secondary Array:
* Drag and drop two 300 GB SSD hard drives to the secondary array bay.
* Open the secondary array and select RAID 0 as the RAID level. RAID 0 provides the best write performance and uses the minimum number of drives (two) for RAID 0. It also provides a total space of
600 GB (300 GB x 2), which meets the requirement.
* Confirm the configuration and close the secondary array.
You have completed the configuration of the storage arrays.

質問 # 464
ある大学生は、キャンパスの共有スペースにあるコンピューターで Linux のライブ CD から起動することができました。今後この種の行為が発生するのを防ぐのに最も効果的なのは次のうちどれですか?

• A. セキュアブートを有効にします。
• B. 起動パスワードを設定します。
• C. TPM セキュリティ機能が必要です。
• D. すべてのメディア オプションを無効にします。

正解：A

解説：
Enabling secure boot will verify the digital signature of the bootloader and operating system, ensuring that the system only boots from trusted and authorised sources. This can prevent booting from an unauthorised live CD or other external media.
The best way to prevent booting from a live Linux CD on a computer in a shared space on campus is to enable secure boot. Secure boot is a feature that ensures that the system only runs software that is signed by an authorized party. This means that the system will not boot from any unauthorized media, including live Linux CDs.
Secure Boot is a feature that ensures that the system only runs software that is signed by an authorized party. This means that the system will not boot from any unauthorized media, including live Linux CDs. Secure Boot is an important security feature designed to prevent malicious software from loading when your PC starts up (boots)1.
Booting from a live Linux CD is a process that allows you to run a Linux operating system from a CD or DVD without installing it on your hard drive. This can be useful for testing or troubleshooting purposes. To boot from a live Linux CD, you need to insert the CD or DVD into your computer's CD/DVD drive and restart your computer. Most systems are set up to automatically boot from the CD/DVD drive, but if your system is not set up this way, you may need to change a system setting to boot from a Linux CD/DVD23.

質問 # 465
技術者が SSH 経由でネットワーク デバイスに接続できない_ 技術者はラップトップとの代替接続方法として次のケーブルのどれを使用する必要がありますか?

• A. HDMI
• B. パラレル
• C. シリアル
• D. ライトニング

正解：C

解説：
The correct answer is A. Serial.
A serial cable is a type of cable that can be used to connect a laptop to a network device via a serial port. A serial port is a physical interface that allows data transmission between devices using serial communication, which is a method of sending data one bit at a time over a single wire. Serial ports are often used for console access to network devices, such as routers, switches, firewalls, or servers, when other methods of connection, such as SSH (Secure Shell), are not available or not working.
SSH is a protocol that allows secure and encrypted remote login and command execution over a network.
SSH uses public key cryptography to authenticate the client and the server, and to encrypt the data exchanged between them. SSH can be accessed through different ports, depending on the configuration of the server and the client. The default port for SSH is 22, but it can be changed to any other port for security reasons.
HDMI (High-Definition Multimedia Interface) is a type of cable that can be used to transmit audio and video signals between devices, such as laptops, monitors, TVs, or projectors. HDMI cables support high-definition video and audio formats, and can also carry Ethernet and power signals. HDMI cables are not suitable for connecting to network devices via SSH, as they are designed for multimedia purposes.
Parallel cables are a type of cable that can be used to connect devices that use parallel communication, which is a method of sending data multiple bits at a time over multiple wires. Parallel cables are often used for connecting printers or scanners to computers, but they are not commonly used for network devices or SSH connections.
Lightning cables are a type of cable that can be used to connect Apple devices, such as iPhones, iPads, or iPods, to computers or chargers. Lightning cables support data transfer and power delivery, and can also be used with adapters to connect to other types of ports, such as USB or HDMI. Lightning cables are not compatible with network devices or SSH connections, as they are specific to Apple products.
Therefore, the only cable that can be used as an alternative connection method with a laptop when SSH is not working is a serial cable. Serial cables can provide console access to network devices and allow configuration and troubleshooting commands to be executed. For more information about SSH and its alternatives, you can refer to the following web search results: Alternatives to SSH, How To Configure Custom Connection Options for your SSH Client, Understanding the SSH Encryption and Connection Process, How to Use Public Key Authentication with SSH.

質問 # 466
SOHO の顧客は、セキュリティを強化するためにネットワーク ハードウェアを購入したいと考えています。ハードウェアはステートフル パケット インスペクションを実行する必要があります。顧客のニーズに最もよく応えるのは次のうちどれですか?

• A. ルーター
• B. プロキシ
• C. ファイアウォール
• D. スイッチ

正解：C

解説：
A firewall is a network device that performs stateful packet inspection, which means it analyzes incoming and outgoing network traffic based on predefined rules and filters, and allows or blocks packets based on their source, destination, protocol, port, or content. A firewall can enhance security by preventing unauthorized access, blocking malicious traffic, enforcing policies, and logging events. A firewall can be hardware-based or software-based, or a combination of both. Reference: https://www.comptia.org/training/books/a-core-1-220-1101-study-guide (page 78)

質問 # 467
技術者が CPU を交換した後、ファンが継続的に動作していることに気付きました。約 5 分後にコンピューターがランダムにクラッシュします。この問題の再発を防ぐために、技術者は次のうちどれを行う必要がありますか?

• A. ソケットを交換します。
• B. セキュアブートを実装します。
• C. Trusted Platform Module を使用します。
• D. サーマルペーストを塗布します。

正解：D

質問 # 468
CAD プログラムをインストールした後、ユーザーの Windows コンピュータの動作が遅くなりました。コンピューターに断続的なタイムアウトが発生し、機能を復元するには再起動が必要になることがよくあります。アプリケーションが実行されていない場合でも、コンピューターは正しく動作しているように見えます。問題のトラブルシューティングを行うために、技術者が次に実行すべきことは次のうちどれですか? (2 つ選択してください)。

• A. イベント ビューアのログを確認します。
• B. アプリケーションを再インストールします。
• C. ビデオカードを交換します。
• D. HDD 上で chkdsk を実行します。
• E. アプリケーションの要件を調査します。
• F. 新しいケースを取り付けます。

正解：A、E

解説：
The technician should research the requirements of the CAD program to see if the computer meets them or needs any upgrades or updates to run it properly. The technician should also check the Event Viewer logs to see if there are any errors or warnings related to the application or system performance that could indicate the cause of the problem or suggest a solution.
Reference: https://www.comptia.org/training/books/a-core-1-220-1101-study-guide (pages 43, 47)

質問 # 469
ハードウェア障害が発生した場合に仮想マシンのデータを保護する最善の方法は次のうちどれですか?

• A. クラウドベースのバックアップ
• B. RAID
• C. UPS
• D. 冗長ハードウェア

正解：A

解説：
The best way to protect the data of a virtual machine in the event of hardware failure is to use a cloud-based backup solution. A cloud-based backup solution is a service that copies and stores the data of a virtual machine to a remote server or storage device over the internet. A cloud-based backup solution can offer several benefits, such as:
* High availability and reliability: A cloud-based backup solution can ensure that the data of a virtual machine is always accessible and recoverable, even if the hardware that hosts the virtual machine fails or is damaged. A cloud-based backup solution can also provide redundancy and fault tolerance, by replicating the data across multiple locations or regions.
* Scalability and flexibility: A cloud-based backup solution can adapt to the changing needs and demands of the virtual machine, by allowing the user to adjust the backup frequency, retention period, and storage capacity. A cloud-based backup solution can also support different types of backup, such as full, incremental, or differential, depending on the user's preferences and requirements.
* Cost-effectiveness and simplicity: A cloud-based backup solution can reduce the cost and complexity of maintaining a backup infrastructure, by eliminating the need to purchase, install, or manage hardware, software, or licenses. A cloud-based backup solution can also automate and streamline the backup process, by providing easy-to-use tools and interfaces, such as web portals, APIs, or scripts.
Other options, such as redundant hardware, UPS, or RAID, may improve the performance or resilience of the hardware that hosts the virtual machine, but they do not provide a complete protection for the data of the virtual machine in the event of hardware failure. Redundant hardware is a technique that uses multiple components or devices to perform the same function, so that if one fails, another can take over. UPS (uninterruptible power supply) is a device that provides backup power to a system in case of a power outage or surge. RAID (redundant array of independent disks) is a technology that combines multiple disks into a logical unit, to improve the speed, capacity, or reliability of the storage. However, these options may not prevent data loss or corruption due to other causes, such as human error, malware, or natural disasters.
Therefore, a cloud-based backup solution is the best way to protect the data of a virtual machine in the event of hardware failure.
References:
* What is Cloud Backup? | Microsoft Azure1
* Cloud Backup - What is it and how does it work? | Veeam2
* Cloud Backup vs. Local Backup: Which Option is Right for You?3

質問 # 470
技術者がレーザー プリンターのトナー カートリッジを交換しています。技術者が最初に完了する必要がある手順はどれですか (2 つ選択してください)。

• A. クリーニングユーティリティを実行します。
• B. シーリングテープを取り外します。
• C. プリンターをキャリブレーションします。
• D. トナーコンパートメントを開きます。
• E. カートリッジの有効期限を確認してください。
• F. カートリッジが正しいモデルであることを確認します。

正解：D、F

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

質問 # 471
技術者は、ストレージ用の SAS コネクタのみを備えたサーバーにストレージを設定しています。技術者は、パフォーマンスを向上させるためにサーバーで RAID 10 を利用したいと考えています。技術者は次のストレージ タイプのうちどれをインストールする必要がありますか?

• A. NVMe M.2
• B. 光学式
• C. mSATA
• D. メカニカル

正解：D

解説：
SAS stands for Serial Attached SCSI, which is a type of interface that connects storage devices to servers or workstations. SAS supports both mechanical hard disk drives (HDDs) and solid state drives (SSDs), but not other types of storage devices, such as NVMe M.2, mSATA, or optical drives12.
RAID stands for Redundant Array of Independent Disks, which is a method of combining multiple storage devices into a logical unit that provides improved performance, reliability, or both. RAID 10 is a combination of RAID 1 (mirroring) and RAID 0 (striping), which means that data is written across two or more striped sets of mirrored drives34.
Therefore, the only type of storage device that the technician can install in a server that only has SAS connectors and wants to use RAID 10 is mechanical HDDs. Mechanical HDDs use spinning platters and moving heads to store and access data, and they are usually cheaper and have larger capacities than SSDs, but they are also slower and more prone to failure .
References:
* CompTIA A+ Core 1 (220-1101) Certification Study Guide, Chapter 3: Hardware, Section 3.3: Storage Devices, Page 131
* CompTIA A+ Core 1 (220-1101) and Core 2 (220-1102) Exam Cram, Chapter 3: Storage, Section 3.2:
Storage Interfaces, Page 97
* CompTIA A+ Core 1 (220-1101) Certification Study Guide, Chapter 3: Hardware, Section 3.4: RAID, Page 143
* CompTIA A+ Core 1 (220-1101) and Core 2 (220-1102) Exam Cram, Chapter 3: Storage, Section 3.4:
RAID, Page 104
* CompTIA A+ Core 1 (220-1101) Certification Study Guide, Chapter 3: Hardware, Section 3.3: Storage Devices, Page 129
* CompTIA A+ Core 1 (220-1101) and Core 2 (220-1102) Exam Cram, Chapter 3: Storage, Section 3.3:
Hard Disk Drives, Page 99

質問 # 472
オンライン小売業者はコストを節約したいと考えており、ピークを過ぎるとパブリック クラウドに移行することを検討しています。
クラウド コンピューティングのこの側面を最もよく表しているのは次のどれですか?

• A. 従量制使用率
• B. 急速な弾力性
• C. 共有リソース
• D. 高可用性

正解：B

解説：
Rapid elasticity is only suitable for a domain whose resource requirements suddenly up and down for a specific time interval. Referring to the question the online retailer wants to migrate to public cloud services during peak season, then wants it to be removed "automatically" when the peak is over.

質問 # 473
ある会社が、在宅勤務するユーザーにスマートフォンを支給しました。デバイスは会社の MDM 内で登録および構成され、セキュリティを強化するために各デバイスに強化プロファイルが展開されました。次のサービスのうち、会社のリソースにアクセスするリモート ユーザーのセキュリティを最も強化するものはどれですか (2 つ選択してください)。

• A. クラウドデータの同期
• B. 管理された企業アプリケーション
• C. 自動デバイスセットアップ
• D. PINコードの強制
• E. 2要素認証
• F. GPS位置追跡

正解：D、E

解説：
Two-factor authentication (2FA) significantly enhances security by requiring two forms of verification before granting access to company resources, making it harder for unauthorized users to gain access even if they have one of the credentials. PIN code enforcement adds an additional layer of security by ensuring that devices are protected by a PIN, making physical access to the device more challenging for unauthorized users. While the other options provide various benefits, 2FA and PIN code enforcement directly enhance the security of remote users accessing company resources.
Reference:
CompTIA A+ Core 1 Exam Objectives Section 2.7: Compare and contrast Internet connection types, network types, and their features.

質問 # 474
次のモデルのうち、従量制使用量の例はどれですか?

• A. リザーブドインスタンス
• B. 従量課金制
• C. サブスクリプションベース
• D. マルチテナント

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 # 475
レーザー プリンタのトナーが紙に付着しないとユーザーから報告がありました。ユーザーは複数のブランドの用紙を試しましたが、判読可能な文書を印刷できませんでした。適切な印刷を保証するには、次のうちどれを置き換える必要がありますか?

• A. トナー分布センサー
• B. トナーカートリッジ
• C. ペーパーチャージトランス
• D. 定着器ユニット

正解：D

解説：
In laser printing, the fuser unit is responsible for bonding the toner to the paper using heat and pressure. If the toner is not sticking to the paper, resulting in illegible documents despite trying different brands of paper, it indicates a problem with the fuser unit. It might not be reaching the necessary temperature to melt the toner properly, necessitating its replacement to ensure proper printouts.
References:
* CompTIA A+ Core 1 Exam Objectives Section 3.7: Given a scenario, install and replace printer consumables.

質問 # 476
次のワイヤレス ネットワーク プロトコルのうち、2.4 GHz と 5 GHz の両方のデバイスをサポートするものはどれですか?

• A. 802.11b
• B. 802.11ax
• C. 802.11g
• D. 802.11ac

正解：B

解説：
802.11 ax is a wireless networking protocol that supports both 2.4GHz and 5GHz devices, as well as backward compatibility with previous 802.11 standards. 802.11 ax offers higher data rates, lower latency, increased capacity, and improved power efficiency than previous protocols. It is also known as Wi-Fi 6 or High Efficiency Wireless (HEW). Reference:
https://www.comptia.org/training/books/a-core-1-220-1101-study-guide (page 82)

質問 # 477
技術者がビデオ編集ワークステーションをセットアップしており、オペレーティング システムは既に内部 M.2 ドライブにインストールされています。
新しいワークステーションは次の要件を満たしている必要があります。
* 最速の速度でファイルを編集できる
* ダウンタイムなしでディスク障害を許容
* 2TBの使用可能容量があること
* 最も堅牢なフォールトトレランスを確保する
説明書
ドロップダウン メニューを使用して、上記の要件に基づいて適切な RAID レベル、ドライブ タイプ、およびドライブ サイズを選択します。選択したドライブ タイプごとに、対応するドライブ サイズも選択する必要があります。

正解：

解説：

質問 # 478
技術者が、ランダムなシステムクラッシュが発生した PC のトラブルシューティングを行っています。技術者はすでにハードドライブとRAMをチェックしており、どちらも正常に動作している状態でした。システムクラッシュのトラブルシューティングを行うために、技術者が次に実行すべき手順はどれですか?

• A. RAM タイミングを減らします。
• B. PSUを交換する
• C. ファン速度をテストします。
• D. USB ポートを無効にする

正解：B

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 # 479
ユーザーは小売ルーターを購入し、プライベート ネットワークをセットアップしたいと考えています。ユーザーは次のネットワーク アドレス範囲のうちどれを設定する必要がありますか?

• A. 224.0.0.0 ～ 224.255.255.255
• B. 172.16.0.0 ～ 172.31.255.255
• C. 239.0.0.0 ～ 239.255.255.255
• D. 170.50.0.0 ～ 170.50.255.255

正解：B

解説：
For setting up a private network, the IP address range should be one that is reserved for private use. The range 172.16.0.0 to 172.31.255.255 falls within the set of IP addresses designated for private networks according to RFC 1918. This range is not routable on the public internet, making it ideal for a private network setup on a retail router.

質問 # 480
次のコネクタのうち、ラップトップの Thunderbolt 3 ポートに接続できるのはどれですか?

• A. microUS3
• B. USB-C
• C. miniUSB
• D. USB-A

正解：B

解説：
Thunderbolt 3 ports use the USB-C connector, which is a small, reversible connector that can be plugged in either way. USB-A and microUSB connectors are larger and have a specific orientation, so they cannot be plugged into Thunderbolt 3 ports. MiniUSB connectors are no longer widely used, and they cannot be plugged into Thunderbolt 3 ports.

質問 # 481
技術者は、RAM をすべて取り外しても起動できないコンピューターを修理しようとしています。問題のトラブルシューティングを行うために技術者が次に行うべきことは次のうちどれですか?

• A. CMOS バッテリーを交換します_
• B. 電源が動作しない場合は、電源を交換します。
• C. マザーボードにコンデンサの膨張がないか検査します。
• D. HDD 電源コネクタがしっかりと差し込まれているかどうかを確認します。

正解：B

解説：
The next step that the technician should do to troubleshoot the issue is C. Swap the power supply if it is inoperable.
A power supply is a device that converts the alternating current (AC) from the wall outlet into direct current (DC) that the computer components can use. A power supply is essential for the computer to boot and function properly. A faulty or inadequate power supply can cause various issues, such as no power, no display, random shutdowns, or beeping sounds.
In this scenario, the technician is trying to fix a computer that fails to boot even when all the RAM is removed. RAM stands for Random Access Memory, and it is a type of memory that stores data and instructions for the processor to access and process. RAM is also essential for the computer to boot and function properly. A faulty or incompatible RAM can cause various issues, such as no boot, no display, blue screen, or beeping sounds.
One of the basic troubleshooting techniques for a computer that fails to boot is to remove all the RAM modules and try to boot with one module at a time in different slots. This can help to identify if the problem is caused by a bad RAM module or a bad RAM slot. If the computer still fails to boot even when all the RAM is removed, it means that the problem is not related to the RAM, but to another component.
The next step that the technician should do is to swap the power supply if it is inoperable. This means that the technician should test the power supply with a multimeter or a power supply tester, and replace it with a known good one if it is faulty or insufficient. This can help to determine if the problem is caused by a bad power supply or a bad motherboard.
The other options are not the next steps that the technician should do, because they are less likely or less effective. Inspecting the motherboard for swollen capacitors (option A) may be helpful if the problem is caused by a damaged or defective motherboard, but it requires opening the computer case and visually examining the motherboard components. Replacing the CMOS battery (option B) may be necessary if the problem is caused by a low or dead CMOS battery, but it usually affects only the BIOS settings and not the boot process. Checking to see if the HDD power connectors are well seated (option D) may be useful if the problem is caused by a loose or faulty HDD connection, but it usually affects only the data access and not the boot process.
For more information about troubleshooting power supply and boot issues, you can refer to the following web search results: [How to Troubleshoot a Computer That Won't Turn On], [How to Test a Power Supply Using a Multimeter], [How to Fix a Computer That Shows No Sign of Power], [How to Troubleshoot Beep Codes].

質問 # 482
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