CompTIA SK0-005リアル試験問題解答は無料 [Q184-Q209]

CompTIA SK0-005リアル試験問題解答は無料

試験問題集でSK0-005練習無料最新のCompTIA練習テスト

質問 # 184
A server technician has received reports of database update errors. The technician checks the server logs and determines the database is experiencing synchronization errors. To attempt to correct the errors, the technician should FIRST ensure:

• A. the correct firewall zone is active
• B. the latest firmware was applied
• C. NTP is running on the database system
• D. the correct dependencies are installed

正解：C

解説：
The first thing that the technician should ensure to correct the database synchronization errors is that NTP is running on the database system. NTP (Network Time Protocol) is a protocol that synchronizes the clocks of network devices with a reference time source, such as an atomic clock or a GPS receiver. NTP ensures that all devices on a network have accurate and consistent time settings, which can affect various functions and applications. Database synchronization is a process of maintaining data consistency and integrity across multiple database servers or instances. Database synchronization can depend on accurate time settings, as time stamps are often used to determine which data is newer or older, and which data should be updated or overwritten. If NTP is not running on the database system, it may cause time drift or discrepancy between different database servers or instances, which can result in synchronization errors or data conflicts.

質問 # 185
An administrator needs to perform bare-metal maintenance on a server in a remote datacenter.
Which of the following should the administrator use to access the server's console?

• A. IP KVM
• B. RDP
• C. VNC
• D. SSH
• E. A crash cart

正解：A

解説：
KVM-over-IP switches are the remote access version of local KVM (keyboard/video/mouse) devices. They allow administrators to control a remote system by sending keyboard and mouse signals over the network and displaying the remote system's video output on the administrator's local machine via a web browser. Administrators can perform almost any function on the remote system as long as it's powered on and connected to the network.

質問 # 186
Which of the following backup types copies changed data from a server and then combines the backups on the backup target?

• A. Incremental
• B. Differential
• C. Synthetic full
• D. Snapshot

正解：C

解説：
A synthetic full backup is a type of backup that copies changed data from a server and then combines the backups on the backup target. This way, the backup target always has a full backup of the server, without requiring a full backup to be performed over the network. A synthetic full backup reduces the network bandwidth and time required for backups, while also simplifying the restoration process1

質問 # 187
A new 40GB NIC has just been installed in a server but is not detected within the Windows server OS. Which of the following would most likely fix the issue?

• A. Update the switch firmware.
• B. Update the server OS.
• C. Update the firmware on the NIC.
• D. Update the remote management console.

正解：C

解説：
Updating the firmware on the NIC is the most likely solution to fix the issue of a new 40GB NIC not being detected within the Windows server OS. Firmware is a software program that controls the functionality of a hardware device, such as a NIC (network interface card). A NIC is a device that enables network communication for a server by providing an interface between the server and the network cable or wireless connection. Updating the firmware on the NIC can improve its performance, compatibility, and stability with the server OS and network protocols. References: CompTIA Server+ Certification Exam Objectives, Domain
4.0: Networking, Objective 4.1: Given a scenario, configure network settings for servers.

質問 # 188
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. Drive
• B. Folder
• C. File
• D. Database

正解：A

解説：
Drive encryption is a form of data-at-rest encryption that encrypts the entire hard drive or solid state drive.
This means that all the data on the drive, including the operating system, applications, and files, are protected from unauthorized access. Drive encryption is usually implemented at the hardware or firmware level, and requires a password, PIN, or biometric authentication to unlock the drive. Drive encryption is the most comprehensive and secure way to achieve data-at-rest encryption, as it prevents anyone from accessing the data without the proper credentials, even if they physically remove the drive from the server.
References: CompTIA Server+ Study Guide, Chapter 9: Security, page 367.

質問 # 189
In which of the following media rotation schemes are daily, weekly, and monthly backup media utilized in a first-in, first-out method?

• A. Synthetic full
• B. Waterfall
• C. Grandfather-father-son
• D. Tower of Hanoi

正解：C

解説：
Grandfather-father-son (GFS) is a common backup rotation scheme that uses daily, weekly, and monthly backup media in a first-in, first-out (FIFO) method. The daily backups are rotated on a 3-months basis using a FIFO system as above. The weekly backups are similarly rotated on a bi-yearly basis, and the monthly backups are rotated on an annual basis. The oldest backup media in each cycle are overwritten by the newest ones. This scheme provides multiple versions of backup data at different intervals, allowing for flexible restoration options. Waterfall is another name for GFS. Synthetic full is a backup method that combines an initial full backup with subsequent incremental backups to create a new full backup without transferring all data again. Tower of Hanoi is another backup rotation scheme that uses an algorithm based on moving disks between three pegs. References:
https://en.wikipedia.org/wiki/Backup_rotation_scheme

質問 # 190
Hackers recently targeted a company with an attack that resulted in a system breach, which compromised the organization's data. Because of the system breach, the administrator had to bypass normal change management procedures. Which of the following change management activities was necessary?

• A. Change request postponement
• B. Emergency change request
• C. User permission change request
• D. Cancelled change request
• E. Privilege change request

正解：B

解説：
Explanation
An emergency change request is a type of change management activity that is used to address urgent issues that pose a significant risk to the organization, such as a system breach. An emergency change request requires immediate action and approval, and it may bypass some of the normal change management procedures, such as testing, documentation, or stakeholder communication12.
References = 1: Change Management Plans: A Definitive Guide -
Indeed(https://www.indeed.com/career-advice/career-development/change-management-activities) 2: The 10 Best Change Management Activities - Connecteam(https://connecteam.com/top-10-change-management-activities/)

質問 # 191
A company needs to increase the security controls on its servers. An administrator is implementing MFA on all servers using cost effective techniques. Which of the following should the administrator use to satisfy the MFA requirement?

• A. Biometrics
• B. Physical tokens
• C. Smart carts
• D. Push notifications

正解：D

解説：
Explanation
Push notifications are messages that are sent from an application or a service to a user's device without requiring the user to open or request them. They can be used as a cost-effective technique for implementing MFA (Multi-Factor Authentication) on servers by sending verification codes or approval requests to the user's smartphone or tablet when they try to log in to the server. Verified References: [Push notifications], [MFA]

質問 # 192
Which of the following should an administrator use to transfer log files from a Linux server to a Windows workstation?

• A. SCP
• B. XCOPY
• C. Robocopy
• D. Telnet

正解：A

解説：
The administrator should use SCP to transfer log files from a Linux server to a Windows workstation. SCP (Secure Copy Protocol) is a protocol that allows secure file transfer between two devices using SSH (Secure Shell) encryption. SCP can transfer files between different operating systems, such as Linux and Windows, as long as both devices have an SSH client installed. SCP can also preserve file attributes, such as permissions and timestamps, during the transfer.

質問 # 193
A server administrator is installing a new server that uses 40G0 network connectivity. The administrator needs to find the proper cables to connect the server to the switch. Which of the following connectors should the administrator use?

• A. QSFP+
• B. SFP
• C. SFP+
• D. GBIC

正解：A

解説：
QSFP+ is a type of connector that should be used to connect a server to a switch that uses 40G network connectivity. QSFP+ (Quad Small Form-factor Pluggable Plus) is a compact, hot-pluggable transceiver module that supports data rates up to 40 Gbps. QSFP+ modules can be used for various network protocols and media types, such as Ethernet, Fibre Channel, InfiniBand, or optical fiber. QSFP+ modules have a 38-pin edge connector and can be inserted into a QSFP+ port on a switch or a server. SFP+ (Small Form-factor Pluggable Plus) is a type of connector that supports data rates up to 10 Gbps, but not 40 Gbps. SFP+ modules have a 20-pin edge connector and can be inserted into an SFP+ port on a switch or a server. GBIC (Gigabit Interface Converter) is an older type of connector that supports data rates up to 1 Gbps, but not 40 Gbps.
GBIC modules have an SC duplex connector and can be inserted into a GBIC port on a switch or a server.
SFP (Small Form-factor Pluggable) is another older type of connector that supports data rates up to 1 Gbps or
4 Gbps, but not 40 Gbps. SFP modules have an LC duplex connector and can be inserted into an SFP port on a switch or a server. References: https://www.howtogeek.com/190014/virtualization-basics-understanding- techniques-and-fundamentals/ https://www.howtogeek.com/428483/what-is-end-to-end-encryption-and-why- does-it-matter/ https://www.howtogeek.com/443611/how-to-encrypt-your-macs-system-drive-removable- devices-and-individual-files/

質問 # 194
An administrator is alerted to a hardware failure in a mission-critical server. The alert states that two drives have failed. The administrator notes the drives are in different RAID 1 arrays, and both are hot-swappable.
Which of the following steps will be the MOST efficient?

• A. Replace both failed drives at the same time.
• B. Replace one drive, wait for a rebuild, and replace the next drive.
• C. Replace all the drives in both degraded arrays.
• D. Shut down the server and replace the drives.

正解：A

解説：
Explanation
Since both drives are in different RAID 1 arrays and both are hot-swappable, the most efficient step is to replace both failed drives at the same time. This can minimize the downtime and avoid unnecessary reboots.
RAID 1 provides mirroring, which means that data is duplicated on both drives in the array. Therefore, replacing one drive will not affect the data on the other drive or the functionality of the array. References:
https://en.wikipedia.org/wiki/Standard_RAID_levels#RAID_1

質問 # 195
An employee who was dismissed did not return company-issued equipment. Which of the following is the most important information the IT department needs to give to the legal department?

• A. Serial number
• B. Labeling
• C. Warranty
• D. Asset tag

正解：D

解説：
The most important piece of information needed by the legal department in the event that an employee does not return company-issued equipment is the asset tag. The asset tag is a unique identifier that is used to track assets throughout their lifecycle. It allows the company to keep precise records of the assets, monitor their location, and manage their overall inventory. In legal situations, the asset tag can be used to prove ownership and aid in the recovery process of the equipment. The serial number is also important, but it is the asset tag that ties the equipment directly to the company's asset management system and is therefore the most crucial for the legal department. Warranty and labeling information are less critical from a legal perspective when it comes to unreturned equipment.

質問 # 196
Which of the following techniques can be configured on a server for network redundancy?

• A. Cloning
• B. Vitalizing
• C. Teaming
• D. Clustering

正解：C

解説：
Teaming is a technique that can be configured on a server for network redundancy. Teaming involves combining two or more network adapters into a single logical unit that acts as one network interface. This way, if one network adapter fails, another one can take over without disrupting network connectivity.
Teaming can also improve network performance by load balancing traffic across multiple network adapters.
Clustering is a technique that involves grouping two or more servers together to act as one system for high availability and fault tolerance. Virtualizing is a technique that involves creating multiple virtual machines on a single physical server to optimize resource utilization and flexibility. Cloning is a technique that involves creating an exact copy of a server's configuration and data for backup or migration purposes. References:
https://docs.microsoft.com/en-us/windows-server/networking/technologies/nic-teaming/nic-teaming
https://www.techopedia.com/definition/19588/clustering https://www.techopedia.com/definition/4790
/virtualization https://www.techopedia.com/definition/4776/cloning

質問 # 197
A server administrator has received tickets from users who report the system runs very slowly and various unrelated messages pop up when they try to access an internet-facing web application using default ports. The administrator performs a scan to check for open ports and reviews the following report:
Starting Nmap 7.70 https://nmap.org) at 2019-09-19 14:30 UTC
Nmap scan report for www.abc.com (172.45.6.85)
Host is up (0.0021s latency)
Other addresses for www.abc.com (not scanned) : 4503 : F7b0 : 4293: 703: : 3209 RDNS record for 172.45.6.85: 1ga45s12-in-f1.2d100.net Port State Service
21/tcp filtered ftp
22/tcp filtered ssh
23/tcp filtered telnet
69/tcp open @username.com
80/tcp open http
110/tcp filtered pop
143/tcp filtered imap
443/tcp open https
1010/tcp open www.popup.com
3389/tcp filtered ms-abc-server
Which of the following actions should the server administrator perform on the server?

• A. Close all ports and rerun the scan.
• B. Close ports 80 and 443 and rerun the scan.
• C. Close port 3389 and rerun the scan.
• D. Close ports 69 and 1010 and rerun the scan.

正解：D

解説：
Port 69 is used for TFTP (Trivial File Transfer Protocol), which is an insecure and unencrypted protocol for file transfer. Port 1010 is used for a malicious website that generates pop-up ads. Both of these ports are likely to be exploited by hackers or malware to compromise the server or the web application. The server administrator should close these ports and rerun the scan to verify that they are no longer open12.
Reference = 1: Why Are Some Network Ports Risky, And How Do You Secure Them? - How-To Geek(https://www.howtogeek.com/devops/why-are-some-ports-risky-and-how-do-you-secure-them/) 2: Switchport Port Security Explained With Examples - ComputerNetworkingNotes(https://www.computernetworkingnotes.com/ccna-study-guide/switchport-port-security-explained-with-examples.html)

質問 # 198
An application server cannot communicate with a newly installed database server. The database server, which has static IP information, is reading the following output from ipconf ig:

The application server is reading the following output from ipconf ig:

Which of the following most likely contains an error?

• A. IP address
• B. Gateway
• C. Subnet mask
• D. DHCP

正解：C

解説：
The subnet mask is most likely containing an error that prevents the application server from communicating with the newly installed database server. The subnet mask is a binary number that defines how many bits of an IP address are used for the network portion and how many bits are used for the host portion. The subnet mask determines which devices belong to the same network or subnet and can communicate directly with each other without routing or switching devices. The subnet mask of the database server is 255.255.O.O, which means that all 32 bits of its IP address are used for the network portion and none for the host portion, which is invalid and makes it unreachable by any other device on any network or subnet. The subnet mask of the application server is 255.O.O.O, which means that only 8 bits of its IP address are used for the network portion and 24 bits are used for the host portion, which is also uncommon and makes it incompatible with most networks or subnets. References: [CompTIA Server+ Certification Exam Objectives], Domain 4.0: Networking, Objective 4.1: Given a scenario, configure network settings for servers.

質問 # 199
An administrator has deployed a new virtual server from a template. After confirming access to the subnet's gateway, the administrator is unable to log on with the domain credentials. Which of the following is the most likely cause of the issue?

• A. The server requires a reboot to complete the deployment process.
• B. The server has not been joined to the domain.
• C. The domain credentials are invalid.
• D. An IP address has not been assigned to the server.

正解：B

解説：
The most likely cause of the issue is that the server has not been joined to the domain. A domain is a logical group of computers and devices that share a common directory service and security policy. A domain controller is a server that manages the domain and authenticates users and computers that want to access domain resources. To log on with domain credentials, a server must be joined to the domain and registered in the directory service. If a server has not been joined to the domain, it will not be recognized or authorized by the domain controller.
References: CompTIA Server+ SK0-005 Certification Study Guide, Chapter 4, Lesson 4.3, Objective 4.3

質問 # 200
Which of the following describes the concept of allocating more resources than what is available on a hypervisor?

• A. Overprovisioning
• B. Link aggregation
• C. Component redundancy
• D. Scalability
• E. Direct access

正解：A

解説：
Overprovisioning: Involves allocating more virtual resources (e.g., CPU, RAM, storage) to virtual machines than the total physical resources available on a hypervisor. The idea is for resources to be dynamically shared, assuming not all VMs will demand their maximum allocation simultaneously.
Direct Access: This usually refers to technologies like RDMA (Remote Direct Memory Access) that allow for very low-latency, direct access to the memory of another computer over a network.
Link Aggregation: The practice of combining multiple physical network links to create a single logical link with increased bandwidth.
Component Redundancy: Refers to having multiple hardware components (e.g., power supplies, hard drives) to provide fault tolerance.
Scalability: The ability of a system to adapt and handle increased workloads by adding resources.
References:
CompTIA Server+ Objectives (Exam codes SK0-004 or SK0-005): Review the sections on virtualization concepts.
Virtualization Technology Documentation: Refer to documentation for popular hypervisors like VMware vSphere, Microsoft Hyper-V, or open-source solutions.

質問 # 201
Which of the following describes the concept of allocating more resources than what is available on a hypervisor?

• A. Overprovisioning
• B. Link aggregation
• C. Component redundancy
• D. Scalability
• E. Direct access

正解：A

解説：
Overprovisioning: Involves allocating more virtual resources (e.g., CPU, RAM, storage) to virtual machines than the total physical resources available on a hypervisor. The idea is for resources to be dynamically shared, assuming not all VMs will demand their maximum allocation simultaneously.
Direct Access: This usually refers to technologies like RDMA (Remote Direct Memory Access) that allow for very low-latency, direct access to the memory of another computer over a network.
Link Aggregation: The practice of combining multiple physical network links to create a single logical link with increased bandwidth.
Component Redundancy: Refers to having multiple hardware components (e.g., power supplies, hard drives) to provide fault tolerance.
Scalability: The ability of a system to adapt and handle increased workloads by adding resources.
Reference:
CompTIA Server+ Objectives (Exam codes SK0-004 or SK0-005): Review the sections on virtualization concepts.
Virtualization Technology Documentation: Refer to documentation for popular hypervisors like VMware vSphere, Microsoft Hyper-V, or open-source solutions.

質問 # 202
A server administrator added a new drive to a server. However, the drive is not showing up as available. Which of the following does the administrator need to do to make the drive available?

• A. Set the compression.
• B. Configure the drive as dynamic.
• C. Create a new disk quota.
• D. Partition the drive.

正解：D

解説：
To make a new drive available on a server, the administrator needs to partition the drive first. Partitioning is a process that divides the drive into one or more logical sections that can be formatted and assigned drive letters or mount points. Partitioning can be done using tools such as Disk Management on Windows or fdisk on Linux. Creating a new disk quota would not help, as disk quotas are used to limit the amount of disk space that users or groups can use on a partition. Configuring the drive as dynamic would not help either, as dynamic disks are used to create volumes that span multiple disks or use RAID features. Setting the compression would not help, as compression is used to reduce the size of files on a partition. Reference: https://www.howtogeek.com/school/using-windows-admin-tools-like-a-pro/lesson2/ https://www.howtogeek.com/howto/17001/how-to-format-a-usb-drive-in-ubuntu-using-gparted/

質問 # 203
A server technician installs a new NIC on a server and configures the NIC for IP connectivity. The technician then tests the connection using the ping command. Given the following partial output of the ping and ipconfig commands:

Which of the following caused the issue?

• A. Incorrect default gateway
• B. Duplicate IP address
• C. DHCP misconfiguration
• D. Incorrect routing table

正解：B

解説：
* The ping command output shows that the NIC has an IP address of 192.168.1.100 and a default gateway of 192.168.1.1. However, when the technician tries to ping the default gateway, the reply comes from another IP address: 192.168.1.101. This means that there is another device on the network that has the same IP address as the default gateway, and it is responding to the ping request instead of the intended destination.
* A duplicate IP address can cause network connectivity problems, such as packet loss, routing errors, or unreachable hosts. To resolve this issue, the technician should either change the IP address of the default gateway or the device that is conflicting with it, or use DHCP to assign IP addresses automatically and avoid conflicts.
* The other options are not correct because they do not explain the ping output. An incorrect default gateway would cause no reply or a destination unreachable message, not a reply from a different IP address. A DHCP misconfiguration would cause an invalid or no IP address on the NIC, not a duplicate IP address on the network. An incorrect routing table would cause routing errors or unreachable destinations, not a reply from a different IP address.
References:
* https://askleo.com/what_is_ping_and_what_does_its_output_tell_me/
* https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/ping

質問 # 204
A server administrator wants to ensure a storage array can survive the failure of two drives without the loss of data. Which of the following RAID levels should the administrator choose?

• A. 0
• B. 1
• C. 2
• D. 3

正解：A

解説：
Explanation
RAID 6 is a level of RAID that can survive the failure of two drives without the loss of data. RAID 6 uses block-level striping with two parity blocks distributed across all member disks. RAID 6 can tolerate two simultaneous drive failures and still provide data access and redundancy. RAID 0 is a level of RAID that uses striping without parity or mirroring, and offers no fault tolerance. RAID 0 cannot survive any drive failure without data loss. RAID 1 is a level of RAID that uses mirroring without parity or striping, and offers fault tolerance by duplicating data on two or more disks. RAID 1 can survive one drive failure without data loss, but not two. RAID 5 is a level of RAID that uses block-level striping with one parity block distributed across all member disks. RAID 5 can tolerate one drive failure without data loss, but not two. References:
https://en.wikipedia.org/wiki/Standard_RAID_levels

質問 # 205
A security analyst completed a port scan of the corporate production-server network. Results of the scan were then provided to a systems administrator for immediate action. The following table represents the requested changes:

The systems administrator created local firewall rules to block the ports indicated above. Immediately, the service desk began receiving calls about the internet being down. The systems administrator then reversed the changes, and the internet became available again. Which of the following ports on DNSSrv must remain open when the firewall rules are reapplied?

• A. 0
• B. 1
• C. 2
• D. 3
• E. 4

正解：B

解説：
Port 53 is the standard port for DNS (Domain Name System) queries and responses. DNS is a service that translates domain names (such as www.example.com) into IP addresses (such as 192.0.2.1) and vice versa. DNS is essential for internet connectivity, as it allows users and applications to access websites and other online resources by using human-readable names instead of numerical addresses1.
The DNSSrv server is a DNS server that provides name resolution for the corporate network. If port 53 is blocked on this server, it will not be able to communicate with other DNS servers or clients, and the name resolution will fail. This will prevent users from accessing any websites or online services that rely on domain names, such as web browsers, email clients, or cloud applications. Therefore, port 53 must remain open on DNSSrv to allow DNS traffic to flow.

質問 # 206
Which of the following script types would MOST likely be used on a modern Windows server OS?

• A. PowerShell
• B. VBS
• C. Bash
• D. Batch

正解：A

解説：
PowerShell is a scripting language and a command-line shell that is designed for Windows server administration. It can perform various tasks such as configuration, automation, and management of servers and applications. Verified References: [PowerShell], [Scripting language]

質問 # 207
Which of the following describes a configuration i winch both nodes of a redundant system respond to service requests whenever possible?

• A. Failover
• B. Active-passive
• C. Active-active
• D. Fallback

正解：C

解説：
Explanation
Active-active is a configuration in which both nodes of a redundant system respond to service requests whenever possible. It can improve the performance, availability, and load balancing of the system by distributing the workload among the nodes. However, it also requires more synchronization and coordination between the nodes to avoid conflicts or errors. Verified References: [Active-active], [Redundant system]

質問 # 208
A server technician notices a server is very low on disk space. Upon inspecting the disk utilization, the technician discovers server logs are taxing up a large amount of space. There is no central log server. Which of the following would help free up disk space?

• A. Log rotation
• B. Log analysis
• C. Log alerting
• D. Log shipping

正解：D

解説：
Log rotation is a process that periodically renames, compresses, and deletes old log files to free up disk space and keep log files manageable. Log rotation can be configured using tools such as logrotate or cron on Linux systems, or using Windows Task Scheduler or PowerShell scripts on Windows systems. Log rotation can also help with log analysis and troubleshooting by making it easier to find relevant information in smaller and more recent log files. References: https://www.mezmo.com/learn-log-management/what-is-log-rotation-how- does-it-work https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/logman

質問 # 209
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