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最新でリアルなCompTIA SK0-005日本語試験問題集解答があります
質問 # 49
A technician recently applied a critical OS patch to a working sever. After rebooting, the technician notices the server Is unable to connect to a nearby database server. The technician validates a connection can be made to the database from another host. Which of the following is the best NEXT step to restore connectivity?
- A. Roll back the applied patch.
- B. Change the service account permissions.
- C. Check the host firewall I rule.
- D. Enable HIDS.
正解：C
解説：
A host firewall is a software that controls the incoming and outgoing network traffic on a server based on predefined rules and filters. It can block or allow certain ports, protocols, or addresses that are used for communication with other servers or devices. If a server is unable to connect to another server after applying a patch, it is possible that the patch changed or added a firewall rule that prevents the connection. The administrator should check the host firewall rule and modify it if necessary to restore connectivity. Verified Reference: [Host firewall], [Network connection]
質問 # 50
A user logs in to a Linux server and attempts to run the following command:
sudo emacs /root/file
However the user gets the following message:
User userid is not allowed to execute Temacs' on this server. Which of the following would BEST allow the user to find out which commands can be used?
- A. sudo -1 -U userid
- B. cat /etc/passwd
- C. visudo I grep userid
- D. userlist I grep userid
正解：A
解説：
This is the best command to find out which commands can be used by a user with sudo privileges because it lists the allowed and forbidden commands for a given user or role. The -l option stands for list, and the -U option specifies the user name. The output of this command will show what commands can be executed with sudo by that user on that server.References:https://www.sudo.ws/man/1.8.13/sudo.man.html
質問 # 51
An organization implements split encryption keys for sensitive files. Which of the following types of risks does this mitigate?
- A. Marware
- B. Data corruption
- C. Hardware failure
- D. Insider threat
正解：D
解説：
An insider threat is a type of risk that can be mitigated by implementing split encryption keys for sensitive files. An insider threat is a malicious actor who has authorized access to an organization's system or data and uses it for unauthorized or harmful purposes. An insider threat can cause data breaches, sabotage, fraud, theft, espionage, or other damages to the organization. Split encryption keys are a method of encrypting data using multiple keys that are stored separately and require collaboration to decrypt. Split encryption keys can prevent an insider threat from accessing or compromising sensitive data without being detected by another authorized party who holds another key. Hardware failure is a type of risk that involves physical damage or malfunction of hardware components such as hard drives, memory modules, power supplies, or fans. Hardware failure can cause data loss, system downtime, performance issues, or other problems for the organization. Hardware failure cannot be mitigated by split encryption keys, but by backup, redundancy, monitoring, and maintenance measures.
質問 # 52
すべてのインターフェイスに負荷を分散するのは次のうちどれですか?
- A. リンクアグリゲーショングループ
- B. 最近使用されたアルゴリズム
- C. アクティブ/パッシブ構成
- D. フェイルオーバー
正解：A
解説：
A link aggregation group (LAG) is a technique that combines multiple physical network interfaces into a single logical interface. This allows for the distribution of traffic across all the interfaces in the group, increasing bandwidth and redundancy. A LAG can use different modes to balance the load, such as address hashing, dynamic, or most recently used algorithm.
References: CompTIA Server+ Study Guide, Chapter 6: Networking, page 239.
質問 # 53
Linux ボックスのログオン スクリプトに使用する最も適切なスクリプト言語は次のうちどれですか?
- A. Batch
- B. Java
- C. VBS
- D. Shell
- E. PowerShell
正解：C
解説：
Reference:
https://redmondmag.com/articles/2016/02/09/logon-scripts-for-active-directory.aspx
質問 # 54
A datacenter technician is attempting to troubleshoot a server that keeps crashing. The server runs normally for approximately five minutes, but then it crashes. After restoring the server to operation, the same cycle repeats. The technician confirms none of the configurations have changed, and the load on the server is steady from power-on until the crash. Which of the following will MOST likely resolve the issue?
- A. Replacing the failing hard drive
- B. Reseating any expansion cards in the server
- C. Restoring the server from the latest full backup
- D. Reinstalling the heat sink with new thermal paste
正解：D
解説：
The most likely solution to resolve the issue of the server crashing after running normally for approximately five minutes is to reinstall the heat sink with new thermal paste. A heat sink is a device that dissipates heat from a component, such as a processor or a graphics card, by transferring it to a cooling medium, such as air or liquid. A heat sink is usually attached to the component using thermal paste, which is a substance that fills the gaps between the heat sink and the component and improves thermal conductivity. Thermal paste can degrade over time and lose its effectiveness, resulting in overheating and performance issues. If a server crashes after running for a short period of time, it may indicate that the processor is overheating due to insufficient cooling.
To resolve this issue, the technician should remove the heat sink, clean the old thermal paste, apply new thermal paste, and reinstall the heat sink.
質問 # 55
データセンターの最高情報責任者は、建物からの送信が外部から検出される可能性があることを懸念しています。この懸念を解決できるのは次のうちどれですか? (2 つ選択してください)。
- A. 迷彩
- B. 近接リーダー
- C. 車止め
- D. RFID
- E. 信号遮断
- F. 反射ガラス
正解：A、E
解説：
Explanation
Signal blocking is a technique that prevents or reduces the transmission of electromagnetic signals from a building to the outside. Signal blocking can be achieved by using materials that absorb, reflect, or scatter the signals, such as metal, concrete, or mesh. Signal blocking can protect the data center from eavesdropping, interference, or jamming by unauthorized parties1.
Camouflage is a technique that disguises or conceals the appearance of a building to make it less noticeable or identifiable from the outside. Camouflage can be achieved by using colors, patterns, shapes, or vegetation that blend in with the surrounding environment. Camouflage can protect the data center from detection, reconnaissance, or targeting by hostile parties
質問 # 56
最近のサードパーティのパッチ更新後にアプリケーションにアクセスできなくなったとユーザーが報告しています。アプリケーションをホストしている物理サーバーが再起動時にクラッシュし続けます。この更新プログラムは推奨に従ってメーカーのサポート Web サイトから直接インストールされましたが、再起動後に更新プログラムが意図せずに不正なソフトウェアをインストールしたため、現在はリコールされ、Web サイトから削除されています。ダウンタイムを最小限に抑えながらアプリケーションへのアクセスを復元するには、管理者が実行する必要がある手順は次のうちどれですか? (2つ選択してください)
- A. サーバーを再フォーマットし、最新のバックアップからイメージを復元します。
- B. ポート スキャンを実行して、開いているポートを確認します。
- C. 別の OS でサーバーを再イメージ化します。
- D. 最近のアップデートをアンインストールします。
- E. マルウェアをスキャンして削除します。
- F. GPO が更新プログラムをアンインストールできるようにします。
正解：A、E
解説：
The most likely cause of the server crashing and the application being inaccessible is that the unauthorized software installed by the update is malware that corrupted the system files or compromised the security of the server. To restore access to the application while minimizing downtime, the administrator should scan and remove any malware from the server, and then reformat the server and restore the image from the latest back-up. This will ensure that the server is clean and has a working configuration of the application. Verified References: [How to Remove Malware from a Server]
質問 # 57
データ バックアップをいつ削除するかを決定する要件を指しているのは次のうちどれですか?
- A. ライフサイクル管理
- B. 保持ポリシー。
- C. オフサイトストレージ
- D. クラウドのセキュリティへの影響
正解：B
解説：
Retention policies are the guidelines that dictate when to delete data backups based on operational or compliance needs. They specify how long, how, where, and in what format the data backups are stored, and who has authority over them. The other options are not directly related to the deletion of data backups.
https://backup.ninja/news/Database-Backups-101-Backup-Retention-Policy-Considerations
質問 # 58
計画外の停止を修復するために、組織が許容できるダウンタイムの最大の対策は次のうちどれですか?
- A. RTO
- B. SLA
- C. BIA
- D. MTTR
正解：A
解説：
RTO (Recovery Time Objective) is a measure of how much downtime an organization can tolerate during an unplanned outage. It is the maximum time allowed for restoring normal operations after a disaster. RTO is one of the key metrics for disaster recovery planning and testing. SLA (Service Level Agreement) is a contract that defines the expected level of service and performance between a provider and a customer. BIA (Business Impact Analysis) is a process that identifies and evaluates the potential effects of a disaster on critical business functions and processes. MTTR (Mean Time To Repair) is a measure of how long it takes to fix a failed component or system. Reference: https://parachute.cloud/rto-vs-rpo/ https://www.techopedia.com/definition/13622/service-level-agreement-sla https://www.techopedia.com/definition/1032/business-impact-analysis-bia https://www.techopedia.com/definition/8239/mean-time-to-repair-mttr
質問 # 59
データセンター内のサーバーの場所を特定するために使用される資産管理文書は次のうちどれですか?
- A. インフラストラクチャ図
- B. ラックレイアウト
- C. サービスマニュアル
- D. ワークフロー図
正解：B
解説：
A rack layout is a document that shows the physical location and arrangement of servers and other devices within a rack. It can include information such as server names, IP addresses, power consumption, and cable connections. A rack layout can help identify and locate servers easily and efficiently in a data center. Verified References: [Rack layout], [Data center]
質問 # 60
次のサーバー タイプのうち、外部 Web サイトへのユーザー アカウント検証用の読み取り専用サーバーとして構成し、既存のネットワークに参加できるのはどれですか?
- A. ディレクトリサーバー
- B. メッセージング サーバー
- C. Web サーバー
- D. Syslog サーバー
正解：A
質問 # 61
A technician is connecting a server's secondary NIC to a separate network. The technician connects the cable to the switch but then does not see any link lights on the NIC. The technician confirms there is nothing wrong on the network or with the physical connection. Which of the following should the technician perform NEXT?
- A. Restart the server
- B. Enable the port on the server
- C. Check the DHCP configuration
- D. Configure the network on the server
正解：B
解説：
The next thing that the technician should perform is to enable the port on the server. A port is a logical endpoint that identifies a specific service or application on a network device. A port can be enabled or disabled depending on whether the service or application is running or not. If a port is disabled on a server, it means that the server cannot send or receive any network traffic on that port, which can prevent communication with other devices or services that use that port. In this case, if port 389 is disabled on the server, it means that the server cannot use LDAP to access or modify directory services over a network. To resolve this issue, the technician should enable port 389 on the server using commands such as netsh or iptables.
質問 # 62
Linux 管理者が、起動時に実行されるスクリプトを作成しました。スクリプトを正常に作成した後、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するのはどれですか?
- A. chmod +w startup.sh
- B. Chmod 444 startup.sh
- C. Chmod+x startup.sh
- D. Chmod 466 startUp,sh
正解：C
解説：
Explanation
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 # 63
A server administrator is completing an OS installation for a new server. The administrator patches the server with the latest vendor-suggested software, configures DHCP, and verifies all network cables are properly connected in the IDF, but there is no network connectivity. Which of the following is the MOST likely reason for the lack of connectivity?
- A. The VLAN Is improperly configured.
- B. The HIDS is preventing the connection.
- C. The OS version is not compatible with the network switch vendor.
- D. The DNS configuration Is invalid.
正解：A
質問 # 64
ユーザーはワイヤレス ネットワークに接続できますが、インターネットにはアクセスできません。ネットワーク管理者はすべてのネットワーク デバイスへの接続を確認し、ISP の停止は発生していません。サーバー管理者は、アクティブなリース プールから古いアドレス リースを削除し、ユーザーがインターネットにアクセスできるようにします。インターネットの問題の原因として最も考えられるのは次のうちどれですか?
- A. DHCP リース時間が短すぎます。
- B. DHCP 除外を削除する必要があります。
- C. DHCP 予約を構成する必要があります。
- D. DHCP スコープがいっぱいです。
- E. DHCP スコープ オプションの構成が間違っています。
正解：D
解説：
The most likely cause of the internet issue is B. The DHCP scope is full.
A DHCP scope is a range of IP addresses that a DHCP server can assign to DHCP clients on a network. A DHCP scope has a start address and an end address, and it can also have some excluded addresses that are not available for lease. A DHCP scope can have various options, such as subnet mask, default gateway, DNS server, etc., that are applied to the DHCP clients along with the IP address. A DHCP scope also has a lease time, which is the duration that a DHCP client can use an IP address before renewing it or releasing it. A DHCP scope can have reservations, which are fixed IP addresses that are assigned to specific DHCP clients based on their MAC addresses12 If a DHCP scope is full, it means that there are no more IP addresses available for lease in the scope. This can happen if the number of DHCP clients exceeds the number of IP addresses in the scope, or if the lease time is too long and the IP addresses are not released or reused frequently enough. If a DHCP scope is full, any new or existing DHCP clients that request an IP address from the DHCP server will not receive one, and they will not be able to access the network or the internet12 In this scenario, users are able to connect to the wireless network, but they are unable to access the internet. The network administrator verifies connectivity to all network devices, and there are no ISP outages. The server administrator removes the old address leases from the active leases pool, which allows users to access the internet. This indicates that the DHCP scope is full, and that removing the old leases frees up some IP addresses for lease in the scope. Therefore, option B is the most likely cause of the internet issue.
質問 # 65
A technician is able to copy a Me to a temporary folder on another partition but is unable to copy it to a network share or a USB flash drive. Which of the following is MOST likely preventing the file from being copied to certain locations?
- A. DLP
- B. Antivirus
- C. An ACL
- D. A firewall
正解：A
解説：
DLP (Data Loss Prevention) is a security measure that prevents unauthorized copying, transferring, or leaking of sensitive data from a server or a network. It can block or alert the user when they try to copy a file to certain locations, such as a network share or a USB flash drive, based on predefined policies and rules. Verified Reference: [DLP], [Data loss]
質問 # 66
サーバーを構成した後、技術者は URL で Web サイトにアクセスすることはできませんが、IP アドレスを入力することで Web サイトにアクセスできます。この問題の原因として最も可能性が高いのは次のうちどれですか?
- A. DNS が正しく構成されていません。
- B. ゲートウェイの構成が正しくありません。
- C. サーバーで DHCP が有効になっていません。
- D. ファイアウォールの設定が間違っています。
正解：A
質問 # 67
次のうち、企業が災害時に許容できるデータ損失の量に関連するものはどれですか?
- A. RTO
- B. MTTR
- C. MTBF
- D. RPO
正解：D
解説：
Below are some of the factors that can affect RPOs:
Maximum tolerable data loss for the specific organization.
Industry-specific factors - businesses dealing with sensitive information such as financial transactions or health records must update more often.
Data storage options, such as physical files versus cloud storage, can affect the speed of recovery.
The cost of data loss and lost operations.
Compliance schemes include provisions for disaster recovery, data loss, and data availability that may affect businesses.
The cost of implementing disaster recovery solutions.
質問 # 68
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