[2024年更新]早速ゲットしてトップランクのCompTIA SK0-005試験問題集
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質問 # 54
A Linux server was recently updated. Now, the server stops during the boot process with a blank screen and an Es prompt. When of the following is the MOST likely cause of this issue?
- A. The BIOS could not find a bootable hard disk
- B. The UEFI boot was interrupted by a missing Linux boot file
- C. The system is booting to a USB flash drive
- D. The BIOS firmware needs to be upgraded
正解：B
解説：
Explanation
The most likely cause of this issue is that the UEFI boot was interrupted by a missing Linux boot file, such as grub.cfg or vmlinuz, which are essential for loading the Linux kernel and booting the system. The sE prompt indicates that the system entered into UEFI Shell mode, which is a command-line interface for troubleshooting UEFI boot issues. The administrator can use UEFI Shell commands to locate and restore the missing boot file or change the boot order. Verified References: [UEFI Shell Guide]
質問 # 55
The management team has mandated the use of data-at-rest encryption on all corporate servers. Using this encryption paradigm will ensure:
- A. attachments that are emailed from this server cannot be intercepted.
- B. databases in use are protected from remote hackers.
- C. files stored on the server are protected against physical theft.
- D. website traffic is protected while traversing the internet.
正解：C
解説：
Data-at-rest encryption is a method of encrypting data while it is stored on a storage device, such as a hard drive, an SSD, or a tape library. This ensures that if the data is stolen or lost, it will be unreadable without the encryption key. Data-at-rest encryption does not protect data while it is in transit over the network, in use by the CPU or memory, or attached to an email.
質問 # 56
A server administrator is installing an OS on a new server. Company policy states no one is to log in directly to the server. Which of the following Installation methods is BEST suited to meet the company policy?
- A. GUI
- B. Clone
- C. Core
- D. Virtualized
正解：C
解説：
A core installation is a type of installation method that is best suited to meet the company policy that states no one is to log in directly to the server. A core installation is a minimal installation option that is available when deploying some editions of Windows Server. A core installation includes most but not all server roles and features, but does not include a graphical user interface (GUI). A core installation can only be managed remotely using command-line tools such as PowerShell or Windows Admin Center, or using graphical tools such as Server Manager or Remote Desktop from another computer. This reduces the attack surface, resource consumption, and maintenance requirements of the server. A GUI installation is a type of installation method that includes a graphical user interface (GUI) and allows local or remote management using graphical tools or command-line tools. A virtualized installation is a type of installation method that involves creating and running one or more virtual machines on a physical host using a hypervisor such as Hyper-V or VMware. A clone installation is a type of installation method that involves creating an exact copy of an existing server's configuration and data on another server using tools such as Sysprep or Clonezilla. References:
https://www.howtogeek.com/67469/the-beginners-guide-to-shell-scripting-the-basics/
https://www.howtogeek.com/443611/how-to-encrypt-your-macs-system-drive-removable-devices-and-individua
https://www.howtogeek.com/199068/how-to-upgrade-your-existing-hard-drive-in-under-an-hour/
質問 # 57
A systems administrator needs to create a data volume out of four disks with the MOST redundancy. Which of the following is the BEST solution?
- A. RAID 5
- B. RAID 1
- C. RAID 0
- D. RAID 6
正解：D
解説：
RAID 6 is a type of RAID level that uses two parity blocks to provide fault tolerance and redundancy for data storage. RAID 6 can withstand the failure of up to two disks in the array without losing any data. RAID 6 requires a minimum of four disks to operate, and it distributes the data and parity blocks across all the disks in the array. RAID 6 has a high write penalty, which means that it takes more time and resources to write data to the disks than to read data from them. However, RAID 6 offers a high level of data protection and reliability, which makes it suitable for applications that require high availability and durability1.
RAID 1 provides redundancy and fault tolerance by mirroring the data from one disk to another disk. RAID 1 offers high read performance and data security, but it has low capacity and write performance. RAID 1 requires a minimum of two disks to operate, and it can only tolerate the failure of one disk in the array. If more than one disk fails, all the data in the array is lost2.
RAID 5 provides redundancy and fault tolerance by using one parity block to store information that can be used to reconstruct the data in case of a disk failure. RAID 5 requires a minimum of three disks to operate, and it distributes the data and parity blocks across all the disks in the array. RAID 5 offers a balance between performance, capacity, and data protection, but it can only tolerate the failure of one disk in the array. If more than one disk fails, all the data in the array is lost2.
Therefore, among these options, RAID 6 is the best solution for creating a data volume out of four disks with the most redundancy.
質問 # 58
A server administrator receives the following output when trying to ping a local host:
Which of the following is MOST likely the issue?
- A. VLAN
- B. DNS
- C. Firewall
- D. DHCP
正解：C
解説：
A firewall is a network device or software that filters and controls the incoming and outgoing traffic based on predefined rules. A firewall can block or allow certain types of packets, ports, protocols, or IP addresses. The output of the ping command shows that the local host is unreachable, which means that there is no network connectivity between the source and the destination. This could be caused by a firewall that is blocking the ICMP (Internet Control Message Protocol) packets that ping uses to test the connectivity. References: https://www.comptia.org/training/resources/exam-objectives/comptia-server-sk0-005-exam-objectives (Objective 2.2)
質問 # 59
A systems administrator has several different types of hard drives. The administrator is setting up a MAS that will allow end users to see all the drives within the NAS. Which of the following storage types should the administrator use?
- A. RAID array
- B. Solid-state drive
- C. Just a bunch of disks
- D. Serial Attached SCSI
正解：C
解説：
Explanation
JBOD (Just a Bunch Of Disks) is a storage configuration that combines different types and sizes of hard drives into one logical unit without any RAID level or redundancy. It allows users to see all the drives within the unit as one large storage space. JBOD can utilize all the available capacity of the drives but does not provide any performance or fault tolerance benefits. Verified References: [JBOD], [RAID]
質問 # 60
An administrator is troubleshooting a RAID issue in a failed server. The server reported a drive failure, and then it crashed and would no longer boot. There are two arrays on the failed server: a two-drive RAIO 0 set tor the OS, and an eight-drive RAID 10 set for data. Which of the following failure scenarios MOST likely occurred?
- A. A drive failed in the OS array.
- B. A drive failed and then recovered in the data array.
- C. A drive failed in both of the arrays.
- D. A drive failed in the data array.
正解：A
解説：
Explanation
If a server has two arrays on the failed server: a two-drive RAID 0 set for the OS, and an eight-drive RAID 10 set for data, then the most likely failure scenario that caused the server to crash and not boot is that a drive failed in the OS array. RAID 0 is a RAID configuration that stripes data across two or more drives without parity or redundancy. RAID 0 offers high performance but no fault tolerance. If one drive fails in RAID 0, all data is lost and the system cannot boot. RAID 10 is a RAID configuration that combines disk mirroring and disk striping with parity. RAID 10 offers high performance and fault tolerance. RAID 10 can tolerate up to one drive failure per mirrored pair without losing data or functionality.References:https://www.technewstoday.com/what-is-a-raid-0/
https://www.technewstoday.com/what-is-a-raid-10/
質問 # 61
A technician is trying to determine the reason why a Linux server is not communicating on a network. The returned network configuration is as follows:
eth0: flags=4163<UP, BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 127.0.0.1 network 255.255.0.0 broadcast 127.0.0.1
Which of the following BEST describes what is happening?
- A. The server is configured to use DHCP, but the DHCP server is sending an incorrect MTU setting
- B. The server is configured to use DHCP, but the DHCP server is sending an incorrect subnet mask
- C. The server is configured to use DHCP on a network that has multiple scope options
- D. The server is configured to use DHCP on a network that does not have a DHCP server
正解：D
解説：
Explanation
The reason why the Linux server is not communicating on a network is that it is configured to use DHCP on a network that does not have a DHCP server. DHCP (Dynamic Host Configuration Protocol) is a protocol that allows a client device to obtain an IP address and other network configuration parameters from a DHCP server automatically. However, if there is no DHCP server on the network, the client device will not be able to obtain a valid IP address and will assign itself a link-local address instead. A link-local address is an IP address that is only valid within a local network segment and cannot be used for communication outside of it. A link-local address has a prefix of 169.254/16 in IPv4 or fe80::/10 in IPv6. In this case, the Linux server has assigned itself a link-local address of 127.0.0.1, which is also known as the loopback address. The loopback address is used for testing and troubleshooting purposes and refers to the device itself. It cannot be used for communication with other devices on the network.
質問 # 62
A user cannot save large files to a directory on a Linux server that was accepting smaller files a few minutes ago. Which of the following commands should a technician use to identify the issue?
- A. df -h
- B. mount
- C. pvdisplay
- D. fdisk -l
正解：A
解説：
The df -h command should be used to identify the issue of not being able to save large files to a directory on a Linux server. The df -h command displays disk space usage in human-readable format for all mounted file systems on the server. It shows the total size, used space, available space, percentage of use, and mount point of each file system. By using this command, a technician can check if there is enough free space on the file system where the directory is located or if it has reached its capacity limit.
質問 # 63
A technician is installing an OS on ten servers. Which of the following media installation types would allow for the fastest installation time?
- A. Embedded
- B. Optical
- C. Network
- D. USB
正解：C
解説：
* Network Installation: Allows the OS image to be deployed from a central server, streamlining deployment across multiple systems simultaneously. This is significantly faster than individual installations from other media. (CompTIA Server+ Objectives SK0-004: 3.1)
* Why other options are less optimal:
* Embedded: Refers to OSes pre-installed on hardware and not intended for mass deployment.
* Optical (CDs/DVDs): Requires physical media insertion on each server, slower than network distribution.
* USB Similar to optical, requires individual installations and can be time-consuming for multiple servers.
質問 # 64
An application needs 10GB of RAID 1 for log files, 20GB of RAID 5 for data files, and 20GB of RAID 5 for the operating system. All disks will be 10GB in capacity. Which of the following is the MINIMUM number of disks needed for this application?
- A. 0
- B. 1
- C. 2
- D. 3
正解：C
解説：
To calculate the minimum number of disks needed for this application, we need to consider the RAID levels and their disk requirements. RAID 1 requires a minimum of two disks and provides mirroring, which means that data is duplicated on both disks. RAID 5 requires a minimum of three disks and provides striping with parity, which means that data is distributed across all disks with one disk storing parity information for error correction. RAID 5 can tolerate one disk failure without losing data. To create a 10GB RAID 1 array for log files, we need two 10GB disks. To create a 20GB RAID 5 array for data files, we need four 10GB disks (three for data and one for parity). To create a 20GB RAID 5 array for the operating system, we need another four 10GB disks (three for data and one for parity). Therefore, the total number of disks needed is 2 + 4 + 4 = 10. However, since we can use different RAID levels for different partitions on the same disk, we can optimize the disk usage by using only eight disks as follows: Disk 1: 10GB RAID 1 (log files) + 10GB RAID 5 (data files) Disk 2: 10GB RAID 1 (log files) + 10GB RAID 5 (data files) Disk 3: 10GB RAID 5 (data files) + 10GB RAID 5 (OS) Disk 4: 10GB RAID 5 (data files) + 10GB RAID 5 (OS) Disk 5: 10GB RAID 5 (parity for data files) + 10GB RAID 5 (OS) Disk 6: 10GB RAID 5 (OS) + unused space Disk 7: 10GB RAID 5 (parity for OS) + unused space Disk 8: unused space Reference: https://en.wikipedia.org/wiki/Standard_RAID_levels
質問 # 65
A technician is configuring a new server with four disks for the development team. The requirements are disk redundancy and maximum usable disk capacity. Which of the following RAID levels should be used for this server?
- A. 0
- B. 1
- C. 2
- D. 3
正解：A
解説：
Scenario: Four disks, requiring redundancy and maximum usable capacity.
RAID Level: RAID 10 (Option D) is the best choice:
RAID 10 combines mirroring (redundancy) and striping (performance).
RAID 0 lacks redundancy, RAID 1 provides less capacity, and RAID 5 requires more
質問 # 66
Which of the following is the most effective way to mitigate risks associated with privacy-related data leaks when sharing with a third party?
- A. Service- and operational-level agreements
- B. Customer data encryption and masking
- C. Third-party acceptable use policy
- D. Non-disclosure and indemnity agreements
正解：B
解説：
The most effective way to mitigate risks associated with privacy-related data leaks when sharing with a third party is customer data encryption and masking. Encryption is a process of transforming data into an unreadable format that can only be decrypted with a key or password. Masking is a process of hiding or replacing sensitive data with fake or meaningless dat a. By encrypting and masking customer data, the organization can protect the confidentiality and integrity of the data and prevent unauthorized access or disclosure by the third party.
References: CompTIA Server+ SK0-005 Certification Study Guide, Chapter 3, Lesson 3.3, Objective 3.3
質問 # 67
Which of the following is a system that scans outgoing email for account numbers, sensitive phrases, and other forms of Pll?
- A. HIDS
- B. IPS
- C. SIEM
- D. DLP
正解：D
解説：
DLP stands for Data Loss Prevention and it is a system that scans outgoing email for account numbers, sensitive phrases, and other forms of PII (Personally Identifiable Information). DLP can help prevent data breaches, comply with regulations, and protect the privacy of customers and employees. DLP can also block, encrypt, or quarantine emails that contain sensitive data. Reference: https://www.comptia.org/training/resources/exam-objectives/comptia-server-sk0-005-exam-objectives (Objective 3.2)
質問 # 68
A company has implemented a requirement to encrypt all the hard drives on its servers as part of a data loss prevention strategy. Which of the following should the company also perform as a data loss prevention method?
- A. Implement MFA on all the servers with encrypted data
- B. Encrypt all network traffic
- C. Block the servers from using an encrypted USB
- D. Implement port security on the switches
正解：A
解説：
Explanation
The company should also implement MFA on all the servers with encrypted data as a data loss prevention method. MFA stands for multi-factor authentication, which is a method of verifying a user's identity by requiring two or more pieces of evidence, such as something they know (e.g., a password), something they have (e.g., a token), or something they are (e.g., a fingerprint). MFA adds an extra layer of security to prevent unauthorized access to sensitive data, even if the user's password is compromised or stolen. Encrypting the hard drives on the servers protects the data from being read or copied if the drives are physically removed or stolen, but it does not prevent unauthorized access to the data if the user's credentials are valid.
質問 # 69
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