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質問 # 207
Linux サーバーから Windows ワークステーションにログ ファイルを転送するために管理者が使用する必要があるのは、次のうちどれですか?
- A. SCP
- B. XCOPY
- C. Telnet
- D. ロボコピー
正解：A
質問 # 208
The management team has mandated the use of data-at-rest encryption for all data. Which of the following forms of encryption best achieves this goal?
- A. Folder
- B. Drive
- C. File
- D. Database
正解：B
解説：
Drive encryption is a form of encryption that best achieves the goal of data-at-rest encryption for all data. Drive encryption encrypts the entire hard drive, including the operating system, applications, and files. This prevents unauthorized access to the data if the drive is lost or stolen. Database, folder, and file encryption are forms of encryption that only encrypt specific data sets, not all data. References: [CompTIA Server+ Certification Exam Objectives], Domain 5.0: Security, Objective 5.3: Given a scenario involving a security threat/vulnerability/risk, implement appropriate mitigation techniques.
質問 # 209
管理者は、すべてのサーバーに影響を与えるものの、簡単に修正できる構成ミスを発見しました。管理者は、影響を受けるサーバーのリストと、問題を修正するためのスクリプトを持っています。必要な変更を提供するために、管理者はサーバーのリストを循環するために次のスクリプト原則のうちどれを使用する必要がありますか?
- A. 定数
- B. ループ
- C. 文字列
- D. リンクされたリスト
正解：B
解説：
A loop is a programming construct that allows a block of code to be executed repeatedly until a certain condition is met1. A loop can be used to cycle through a list of servers and run a script on each one of them. For example, in Python, a loop can be written as:
Python
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# Assume servers is a list of server names
for server in servers:
# Run the script on the server
run_script(server)
A loop can help automate the task of correcting the misconfiguration on all servers, saving time and effort.
質問 # 210
A technician set up a new multifunction printer. After adding the printer to the print server, the technician configured the printer on each user's machine. Several days later, users reported that they were no longer able to print, but scanning to email worked. Which of the following is most likely causing this issue?
- A. The printer's network interface failed.
- B. The gateway is no longer being reached.
- C. The printer had DHCP enabled.
- D. The network firewall was enabled.
正解：C
解説：
The most likely cause of this issue is that the printer had DHCP enabled, which changed its IP address after adding it to the print server and configuring it on each user's machine. DHCP (Dynamic Host Configuration Protocol) is a network protocol that assigns IP addresses and other network configuration parameters to devices automatically, without manual intervention. DHCP can simplify network management and avoid IP conflicts, but it can also cause problems if the devices are not configured to use static or reserved IP addresses. If the printer had DHCP enabled, it might have received a different IP address from the DHCP server after rebooting or reconnecting to the network, which would make it unreachable by the print server and the users' machines that were configured with the previous IP address. Scanning to email would still work, as it does not depend on the print server or the users' machines, but on the printer's SMTP settings and internet connection. Reference: [CompTIA Server+ Certification Exam Objectives], Domain 4.0: Networking, Objective 4.l: Given a scenario, configure network settings for servers.
質問 # 211
Which of the following cloud models is BEST described as running workloads on resources that are owned by the company and hosted in a company-owned data center, as well as on rented servers in another company's data center?
- A. Hybrid
- B. Private
- C. Community
- D. Public
正解：A
解説：
This is the best description of a hybrid cloud model because it combines both private and public cloud resources. A private cloud is a cloud environment that is owned and operated by a single organization and hosted in its own data center. A public cloud is a cloud environment that is owned and operated by a third-party provider and hosted in its data center. A hybrid cloud allows an organization to leverage both types of cloud resources depending on its needs and preferences.References:https://azure.microsoft.com/en-us/overview/what-is-hybrid-cloud-computing/
質問 # 212
Which of the following symbols is used to write a text description per line within a PowerShell script?
- A. @
- B. #
- C. %
- D. &
正解：B
解説：
The # symbol is used to write a text description per line within a PowerShell script. A text description is also known as a comment, which is a line of code that is ignored by the PowerShell interpreter and serves as documentation or explanation for human readers. The # symbol indicates that everything following it on the same line is a comment and not part of the script commands or expressions. For example:
This is a comment in PowerShellWrite-Host "Hello World" # This command prints Hello World to the console References: CompTIA Server+ Certification Exam Objectives, Domain 6.0: Troubleshooting, Objective 6.3:
Given a scenario, troubleshoot scripting errors using PowerShell commands.
質問 # 213
技術者が再利用されたサーバーをセットアップしています。最小要件は 2 TB ですが、最高のパフォーマンスを保証し、1 つのドライブの障害に対するサポートを提供します。技術者は次の 6 つのドライブを使用できます。
この目標を最もよく達成するために、技術者は次のドライブの選択のうちどれを利用する必要がありますか?
- A. 1、2、3、4、および 6
- B. 1、2、3、5、および 6
- C. 1、2、4、および 6
- D. 1、2、4、5、および 6
正解：D
解説：
* RAID 5 configuration: Using five of the available drives in a RAID 5 configuration meets the requirements for:
* Storage capacity: Four 600GB drives (2, 5, and 6) provide a total usable capacity of 2.4TB (4 *
600 * 0.8), exceeding the minimum requirement of 2TB. RAID 5 introduces parity data for fault tolerance, sacrificing some usable space (one drive's worth).
* Performance: The combination of multiple drives in a RAID 5 array improves read performance compared to a single drive setup.
* Fault tolerance: Even with a single drive failure (any of the five drives used in the RAID 5), the remaining drives can reconstruct the lost data, allowing the server to continue operating.
質問 # 214
An administrator receives an alert stating a S.MAR.T. error has been detected. Which of the following should the administrator run FIRST to determine the issue?
- A. A RAM test
- B. A hard drive test
- C. A firmware update
- D. A power supply swap
正解：B
解説：
A S.M.A.R.T. error is an indication of a potential failure of a hard drive. S.M.A.R.T. stands for Self-Monitoring, Analysis and Reporting Technology and it is a feature that monitors the health and performance of hard drives. A hard drive test can help diagnose the issue and determine if the drive needs to be replaced. References: https://www.comptia.org/training/resources/exam-objectives/comptia-server-sk0-005-exam-objectives (Objective 1.1)
質問 # 215
管理者は、模擬災害復旧演習に参加しているときに、エラーなしでいくつかのデータベース ファイルを復元しました。その後、管理者は、復元されたデータベースが破損していて使用できないと報告しました。この問題の原因を最もよく説明しているものは次のうちどれですか?
- A. 復元プロセス中にデータベース ファイルがロックされました。
- B. データベースは非同期的にレプリケートされました
- C. データベースはミラー化されました
- D. データベースは、アプリケーションの整合性を保つためにバックアップされませんでした。
正解：D
解説：
Application consistent backup is a method of backing up data that ensures the integrity and consistency of the application state. It involves notifying the application to flush its data from memory to disk and quiescing any write operations before taking a snapshot of the data. If the databases were not backed up to be application consistent, they might contain incomplete or corrupted data that cannot be restored properly.
Reference:
CompTIA Server+ Certification Exam Objectives1, page 12
What is Application Consistent Backup and How to Achieve It2
Application-Consistent Backups3
質問 # 216
次のライセンスのうち、ベンダーの支援が含まれる可能性が最も高いのはどれですか?
- A. メンテナンスとサポート
- B. オープンソース
- C. バージョンの互換性
- D. サブスクリプション
正解：A
解説：
Maintenance and support is a type of license that would most likely include vendor assistance. Maintenance and support is a contract that defines the level and scope of service and assistance that a vendor provides to a customer for using their software product. Maintenance and support may include technical support, bug fixes, patches, updates, upgrades, documentation, training, and other benefits. Maintenance and support licenses usually have an annual fee based on the number of users or devices covered by the contract. Open-source is a type of license that allows free access to the source code and modification and distribution of the software product, but does not guarantee vendor assistance. Version compatibility is not a type of license, but a feature that ensures software products can work with different versions of operating systems or other software products. Subscription is a type of license that allows access to software products for a limited period of time based on recurring payments, but does not necessarily include vendor assistance. Reference: https://www.techopedia.com/definition/1440/software-licensing https://www.techopedia.com/definition/1032/business-impact-analysis-bia
質問 # 217
Linux 管理者は、起動時に実行されるスクリプトを作成しました。スクリプトの作成に成功した後、スクリプトを実行しようとすると、管理者は次の出力を受け取りました。
Bash ./startup,sh:許可が拒否されました
次のコマンドのうち、エラー メッセージを最もよく解決できるものはどれですか?
- A. Chmod+x 起動.sh
- B. Chmod +wstartup.sh
- C. Chmod 444 起動.sh
- D. Chmod 466 起動、sh
正解：A
解説：
This is the command that would best resolve the error message "Bash ./startup.sh: Permission denied" when trying to execute a script on Linux. Chmod is a command that changes the permissions of files or directories on Linux. +x is an option that adds the execute permission to the file or directory for the owner, group, and others. startup.sh is the name of the script file that needs to be executed. By running chmod +x startup.sh, the technician grants execute permission to the script file and allows it to be run by any user. Chmod +w startup.
sh would add write permission to the file, but not execute permission. Chmod 444 startup.sh would set read- only permission for all users, but not execute permission. Chmod 466 startup.sh would set read and write permission for the owner and write-only permission for group and others, but not execute permission.
References: https://www.howtogeek.com/437958/how-to-use-the-chmod-command-on-linux
質問 # 218
上級管理者は、Linux サーバーで次のスクリプトを実行するように技術者に指示します。
{1..65536) の i の場合; Si をエコーします。telnet ローカルホスト $i; 終わり
スクリプトは、ほとんどの場合、次のメッセージを返します: 接続が拒否されました。ただし、コンソール表示には次のようなエントリがいくつかあります。
80
ローカルホストに接続しました
443
ローカルホストに接続しました
技術者が次に実行する必要があるアクションは次のうちどれですか?
- A. このサーバーで許可されていない HTTP サービスを探します
- B. このサーバーで許可されていない Telnet サービスを探します
- C. このサーバーで許可されていないポート スキャン サービスを探します。
- D. このサーバーでウイルス感染を探します
正解：A
解説：
Explanation
The script that the technician is running is trying to connect to every port on the localhost (the same machine) using telnet, a network protocol that allows remote access to a command-line interface. The script mostly fails because most ports are closed or not listening for connections. However, the script succeeds on ports 80 and
443, which are the default ports for HTTP and HTTPS protocols, respectively. These protocols are used for web services and web browsers. Therefore, the technician should look for an unauthorized HTTP service on this server, as it may indicate a security breach or a misconfiguration. Looking for a virus infection on this server is also possible, but not the most likely source of the issue. Looking for an unauthorized Telnet service on this server is not relevant, as the script is using telnet as a client, not a server. Looking for an unauthorized port scanning service on this server is not relevant, as the script is scanning ports on the localhost, not on other machines. References:
https://phoenixnap.com/kb/telnet-windows
https://www.techopedia.com/definition/23337/http-port-80
https://www.techopedia.com/definition/23336/https-port-443
質問 # 219
An administrator is configuring a new server for use as a database server. It will have two mirrored drives to hold the operating system, and there will be three drive bays remaining for storage Which of the following RAID levels will yield the BEST combination of available space and redundancy?
- A. RAID 1
- B. RAID
- C. RAIDS
- D. RAID 10
正解：D
質問 # 220
最近のアプリケーションの移行により、企業の現在のストレージ ソリューションは、複数のユーザーがリアルタイムでデータにアクセスするときにパフォーマンスに影響を与えずにデータをホストするために必要な要件を満たしていません。この問題に対する最善の解決策は次のうちどれですか?
- A. データを圧縮して利用可能なスペースを増やします。
- B. 影響を受けるユーザーのためにローカルの外付けハード ドライブをインストールします。
- C. 新しいファイバー チャネル SAN ソリューションを展開します。
- D. データが保存されているサーバーにメモリを追加します。
正解：C
解説：
A Fibre Channel SAN solution is a type of storage area network (SAN) that uses high-speed optical fiber cables to connect servers and storage devices. A SAN allows for hosting data without impacting performance when the data is accessed in real time by multiple users, as it provides fast data transfer rates, low latency, high availability, and scalability12. A local external hard drive (A) would not be suitable for multiple users, as it would limit the accessibility and security of the data. Adding extra memory to the server (B) would not solve the problem of data access performance, as it would not increase the bandwidth or reduce the congestion of the network. Compressing the data would not improve the performance either, as it would add extra overhead and complexity to the data processing and retrieval. References: 1 https://www.techradar.com/best
/best-cloud-storage 2 https://solutionsreview.com/data-storage/the-best-enterprise-data-storage-solutions/
質問 # 221
A server technician downloaded new firmware from the manufacturer's website. The technician then attempted to install the firmware on the server, but the installation failed, stating the file is potentially corrupt. Which of the following should the technician have checked prior to installing the firmware?
- A. ECC support
- B. DLF configuration
- C. MD5 checksum
- D. MBR failure
正解：C
解説：
A MD5 checksum is a value that is calculated from a file using a cryptographic hash function. A MD5 checksum is used to verify the integrity of a file by comparing it with the original value provided by the manufacturer or the source. If the MD5 checksums match, it means that the file is authentic and has not been corrupted or tampered with. If the MD5 checksums do not match, it means that the file is potentially corrupt or malicious and should not be installed12. A DLF configuration (A) is a setting that determines how a dynamic link library (DLL) is loaded into memory and executed by an application. A DLF configuration does not check the integrity of a file. A MBR failure (B) is a problem that occurs when the master boot record (MBR) of a disk is damaged or corrupted, preventing the system from booting. A MBR failure does not check the integrity of a file. ECC support © is a feature that enables error-correcting code (ECC) memory to detect and correct data errors in RAM. ECC support does not check the integrity of a file. Reference: 1 https://www.comparitech.com/net-admin/file-integrity-monitoring-tools/ 2 https://csrc.nist.gov/CSRC/media/Presentations/Firmware-Integrity-Verification-Monitoring-and-Re/images-media/day2_demonstration_330-420.pdf
質問 # 222
サーバーをラックに取り付ける場合、技術者はサーバー用に 4 本のネットワーク ケーブルと 2 本の電源ケーブルを取り付ける必要があります。このタスクを完了するための最も適切な方法は次のうちどれですか?
- A. 適切な長さのケーブルを使用して、4 本のネットワーク ケーブルと 2 本の電源ケーブルをケーブル マネジメント アームを通して配線します。
- B. ラック内のサーバー レールを調整できるように、できるだけ長いケーブルを使用します。
- C. ツアー ネットワーク ケーブルをラックの左側からラック スイッチの上部まで配線します。2 本の電源ケーブルをラックの右側から UPS に向かって配線します。
- D. イーサネット パッチ パネルと PDU を取り付けて、ネットワーク ケーブルと電源ケーブルを収容します。
正解：A
質問 # 223
Which of the following physical security concepts would most likely be used to limit personnel access to a restricted area within a data center?
- A. An access control vestibule
- B. Video surveillance
- C. Data center camouflage
- D. Bollards
正解：A
解説：
An access control vestibule is a physical security concept that limits personnel access to a restricted area within a data center. It is a small room or hallway that has two doors: one that leads to the outside and one that leads to the restricted area. The doors are controlled by an electronic lock that requires authentication, such as a card reader, biometric scanner, or keypad. Only authorized personnel can enter the vestibule and access the restricted area. Reference: CompTIA Server+ Certification Exam Objectives, Domain 5.0: Security, Objective 5.1: Given a scenario, apply physical security methods to a server.
質問 # 224
An administrator has been asked to disable CPU hyperthreading on a server to satisfy a licensing issue. Which of the following best describes how the administrator will likely perform this action?
- A. Modify the startup configuration.
- B. Use a RDP/VNC session.
- C. Use a PowerSheII/Bash script.
- D. Use the BIOS/UEFI setup.
正解：D
解説：
One of the settings that can be changed in the BIOS/UEFI setup is the CPU hyperthreading option. Hyperthreading is a technology that enables a single physical CPU core to execute two threads or tasks simultaneously, improving the performance and efficiency of multi-threaded applications. However, some software licenses may limit the number of CPU cores or threads that can be used, and therefore require disabling hyperthreading on the server34.
To disable hyperthreading on a server, the administrator will likely need to enter the BIOS/UEFI setup and navigate to the processor options menu. There, the administrator will find a setting for Intel Hyperthreading Technology or Hyperthreading Function, which can be enabled or disabled. The administrator will need to disable this setting and save the changes. This will turn off hyperthreading on the server and reduce the number of logical CPUs to match the number of physical cores5.
質問 # 225
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