CompTIA CompTIA Certifications SK0-005 Questions & Answers

• Question 271:

  A server technician is installing a new server OS on legacy server hardware. Which of the following should the technician do FIRST to ensure the OS will work as intended?

  A. Consult the HCL to ensure everything is supported.

  B. Migrate the physical server to a virtual server.

  C. Low-level format the hard drives to ensure there is no old data remaining.

  D. Make sure the case and the fans are free from dust to ensure proper cooling.

  Correct Answer: A

  The first thing that the technician should do before installing a new server OS on legacy server hardware is to consult the HCL (Hardware Compatibility List) to ensure everything is supported. The HCL is a list of hardware devices and components that are tested and certified to work with a specific OS or software product. The HCL helps to avoid compatibility issues and performance problems that may arise from using unsupported or incompatible hardware. Migrating the physical server to a virtual server may be a good option to improve scalability and flexibility, but it requires additional hardware and software resources and may not be feasible for legacy server hardware. Low-level formatting the hard drives may be a good practice to erase any old data and prepare the drives for a new OS installation, but it does not guarantee that the hardware will work with the new OS. Making sure the case and the fans are free from dust may be a good practice to ensure proper cooling and prevent overheating, but it does not guarantee that the hardware will work with the new OS.

  References: https://www.howtogeek.com/190014/virtualization-basics-understanding-techniques-and-fundamentals/ https://www.howtogeek.com/173353/how-to-low-level-format-or-write-zeros-to-a-hard-drive/ https://www.howtogeek.com/303282/how-to-manage-your-pcs-fans-for-optimal-airflow-and-cooling/

• Question 272:

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

  A. Clustering

  B. Vitalizing

  C. Cloning

  D. Teaming

  Correct Answer: D

  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

• Question 273:

  Users cannot access a new server by name, but the server does respond to a ping request using its IP address. All the user workstations receive their IP information from a DHCP server. Which of the following would be the best step to perform NEXT?

  A. Run the tracert command from a workstation.

  B. Examine the DNS to see if the new server record exists.

  C. Correct the missing DHCP scope.

  D. Update the workstation hosts file.

  Correct Answer: B

  If users cannot access a new server by name, but the server does respond to a ping request using its IP address, it means that there is a problem with name resolution. The DNS (Domain Name System) is a service that maps hostnames to IP addresses and vice versa. Therefore, the best step to perform next is to examine the DNS to see if the new server record exists and matches its IP address. If not, the DNS record needs to be added or updated accordingly. Running the tracert command from a workstation would not help with name resolution, as it only shows the route taken by packets to reach a destination by IP address. Correcting the missing DHCP scope would not help either, as DHCP (Dynamic Host Configuration Protocol) only assigns IP addresses and other network settings to clients, but does not resolve names. Updating the workstation hosts file would be a temporary workaround, but not a permanent solution, as it would require manually editing every workstation's hosts file with the new server's name and IP address.

  References: https://www.howtogeek.com/164981/how-to-use-nslookup-to-check-domain-name-information-in-microsoft-windows/ https://www.howtogeek.com/howto/27350/beginner-geek-how-to-edit-your-hosts-file/

• Question 274:

  Alter rack mounting a server, a technician must install four network cables and two power cables for the server. Which of the following is the MOST appropriate way to complete this task?

  A. Wire the four network cables and the two power cables through the cable management arm using appropriate-length cables.

  B. Run the tour network cables up the left side of the rack to the top of the rack switch. Run the two power cables down the right side of the rack toward the UPS.

  C. Use the longest cables possible to allow for adjustment of the server rail within the rack.

  D. Install an Ethernet patch panel and a PDU to accommodate the network and power cables.

  Correct Answer: B

  This is the most appropriate way to complete the task because it follows the best practices of cable management. Cable management is a process of organizing and securing cables in a rack or a server room to improve airflow, accessibility,

  safety, and aesthetics. Running the network cables up the left side and the power cables down the right side of the rack helps to avoid cable clutter, interference, and confusion. It also makes it easier to trace and troubleshoot cables if

  needed. Using appropriate-length cables also helps to reduce cable slack and excess. Wiring the cables through the cable management arm may cause stress and damage to the cables when moving the server in or out of the rack. Using the

  longest cables possible may create cable loops and tangles that can block airflow and increase fire hazards. Installing an Ethernet patch panel and a PDU (Power Distribution Unit) may be useful for accommodating more network and power

  cables, but not necessary for a single server.

  References:

  https://www.howtogeek.com/303282/how-to-manage-your-pcs-fans-for-optimal-airflow-and-cooling/

  https://www.howtogeek.com/303290/how-to-properly-manage-your-cables/

• Question 275:

  A technician is working on a Linux server. The customer has reported that files in the home directory are missing. The /etc/ f stab file has the following entry:

  nfsserver:/home /home nfs defaults 0 0

  However, a df -h /home command returns the following information:

  /dev/sda2 10G 1G 9G 10% /home

  Which of the following should the technician attempt FIRST to resolve the issue?

  A. mkdir /home

  B. umount nfsserver:/home

  C. rmdir nfsserver:/home/dev/sda2

  D. mount /home

  Correct Answer: B

  The /etc/fstab file contains the information about the file systems that are mounted automatically at boot time or on demand. The entry nfsserver:/home /home nfs defaults 0 0 indicates that the /home directory on the local server is mounted from the /home directory on a remote server called nfsserver using the NFS protocol. However, the df -h /home command shows that the /home directory is actually mounted from a local partition /dev/sda2, which may not contain the user's files. This means that the NFS mount failed or was overridden by another mount. To resolve the issue, the technician should attempt to unmount the local partition using umount nfsserver:/home, which will detach the /home directory from / dev/sda2. Then, the technician should try to mount the NFS share again using mount /home, which will attach the /home directory to nfsserver:/home according to the /etc/fstab entry12. Creating a new directory (A) or removing an existing one ?would not help, as they would not affect the mount point. Mounting /home (D) without unmounting it first would not work, as it would result in an error that the mount point is busy3.

  References: https://askubuntu.com/questions/374870/home-directory-not-being-created https://www.techrepublic.com/article/how-to-properly-automount-a-drive-in-ubuntu-linux/ https://serverfault.com/questions/587855/cannot-find-home-directory-on-linux-server

• Question 276:

  A technician has several possible solutions to a reported server issue. Which of the following BEST represents how the technician should proceed with troubleshooting?

  A. Determine whether there is a common element in the symptoms causing multiple problems.

  B. Perform a root cause analysis.

  C. Make one change at a time and test.

  D. Document the findings, actions, and outcomes throughout the process.

  Correct Answer: C

  This is the best way to proceed with troubleshooting when the technician has several possible solutions to a reported server issue. Making one change at a time and testing allows the technician to isolate the cause and effect of each solution and determine which one works best. It also helps to avoid introducing new problems or complicating existing ones by making multiple changes at once. Determining whether there is a common element in the symptoms causing multiple problems is a good step to perform before identifying possible solutions, but not after. Performing a root cause analysis is a good step to perform after resolving the issue, but not during. Documenting the findings, actions, and outcomes throughout the process is a good practice to follow at every step of troubleshooting, but not a specific way to proceed with testing possible solutions.

  References: https://www.howtogeek.com/174288/how-to-tell-if-your-computer-is-overheating-and-what-to-do-about-it/ https://www.howtogeek.com/428483/what-is-end-to-end-encryption-and-why-does-it-matter/

• Question 277:

  A server administrator is installing a new server that uses 40Gb 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. SFP+

  B. GBIC

  C. SFP

  D. QSFP+

  Correct Answer: D

  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/

• Question 278:

  An administrator has attached an old SCSI JBOD to a server to recover archival data. However, the array will not mount to the server. Which of the following should the administrator check FIRST?

  A. Terminators are installed on the controller card and the array.

  B. Disk drivers are not installed on the server.

  C. SCSI BIOS needs to be updates.

  D. Terminators are installed on each hard drive.

  Correct Answer: B

• Question 279:

  Winch of the following is a type of replication in which all files are replicated, all the time?

  A. Constant

  B. Application consistent

  C. Synthetic full

  D. Full

  Correct Answer: A

  Constant replication is a type of replication in which all files are replicated, all the time. Replication is a process of copying data from one location to another for backup, recovery, or distribution purposes. Constant replication is also known as real-time replication or synchronous replication. It ensures that any changes made to the source data are immediately reflected on the target data without any delay or lag. Constant replication provides high availability and consistency, but it requires high bandwidth and low latency. Application consistent replication is a type of replication that ensures that the replicated data is consistent with the state of the application that uses it. It involves quiescing or pausing the application before taking a snapshot of the data and resuming the application after the snapshot is taken. Application consistent replication provides better recovery point objectives than crash consistent replication, which does not quiesce the application before taking a snapshot. Synthetic full replication is a type of replication that involves creating a new full backup by using the previous full backup and related incremental backups. It reduces the backup window and network bandwidth consumption by transferring only changed data from the source to the target. Full replication is a type of replication that involves copying all data from the source to the target regardless of whether it has changed or not. It provides a complete backup of the data, but it requires more storage space and network bandwidth than incremental or differential replication. References: https://www.howtogeek.com/199068/how-to-upgrade-your-existing-hard-drive-in-under-an-hour/ https://www.howtogeek.com/202794/what-is-the-difference-between-127.0.0.1-and-0.0.0.0/ https://www.howtogeek.com/443611/how-to-encrypt-your-macs-system-drive-removable-devices-and-individual-files/

• Question 280:

  Which of the following allows for a connection of devices to both sides inside of a blade enclosure?

  A. Midplane

  B. Active backplane

  C. Passive backplane

  D. Management module

  Correct Answer: A

  The component that allows for a connection of devices to both sides inside of a blade enclosure is midplane. A midplane is a board or panel that connects two sets of connectors or devices in parallel with each other. A midplane is typically used in blade enclosures or chassis to provide power and data connections between blade servers on one side and power supplies, cooling fans, switches, or management modules on the other side. A midplane can also act as a backplane by providing bus signals or communication channels between devices.