SK0-005 Free Practice Test

A company needs a media server set up that provides the highest availability with a minimum requirement of at least 10TB. The company purchased five HDDs, each with a 4TB
capacity. Which of the options would provide the highest fault tolerance and meet the requirements?

1. A. RAID 0
2. B. RAID 5
3. C. RAID 6
4. D. RAID 10

Correct Answer: C
RAID 6 is a RAID level that uses disk striping with two parity blocks distributed across all member disks. It can tolerate the failure of up to two disks without losing any data. RAID 6 can provide a minimum of 10TB of usable storage space with five 4TB disks, as the formula for calculating the RAID 6 capacity is (n-2) x Smin, where n is the number of disks and Smin is the smallest disk size. In this case, the RAID 6 capacity is (5-2) x 4TB = 12TB. References:
✑ CompTIA Server+ Certification Exam Objectives1, page 8
✑ RAID Levels and Types Explained: Advantages and Disadvantages2
✑ RAID Levels & Fault Tolerance3

A system administrator has been alerted to a zero-day vulnerability that is impacting a service enabled on a server OS. Which of the following would work BEST to limit an attacker from exploiting this vulnerability?

1. A. Installing the latest patches
2. B. Closing open ports
3. C. Enabling antivirus protection
4. D. Enabling a NIDS

Correct Answer: A
The best way to limit an attacker from exploiting a zero-day vulnerability that is impacting a service enabled on a server OS is to install the latest patches. Patches are updates that fix bugs, improve security, or add features to software. Installing patches can help prevent attackers from exploiting known vulnerabilities that have been fixed by the software vendor. A zero-day vulnerability is a vulnerability that is unknown to the vendor or the public until it is exploited by an attacker. Therefore, installing patches as soon as they are available can reduce the window of opportunity for attackers to exploit zero-day vulnerabilities.Reference: https://www.ibm.com/cloud/learn/patch-management

A server is reporting a hard drive S.M.A.R.T. error. When a technician checks on the drive, however, it appears that all drives in the server are functioning normally. Which of the following is the reason for this issue?

1. A. A S.M.A.R.
2. B. error is a predictive failure notic
3. C. The drive will fail in the near future and should be replaced at the next earliest time possible
4. D. A S.M.A.R.
5. E. error is a write operation erro
6. F. It has detected that the write sent to the drive was incorrectly formatted and has requested a retransmission of the write from the controller
7. G. A S.M.A.R.
8. H. error is simply a bad secto
9. I. The drive has marked the sector as bad and will continue to function properly
10. J. A S.M.A.R.
11. K. error is an ECC erro
12. L. Due to error checking and correcting, the drive has corrected the missing bit and completed the write operation correctly.

Correct Answer: A
A S.M.A.R.T. error is a predictive failure notice. The drive will fail in the near future and should be replaced at the next earliest time possible. S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) is a feature that monitors the health and performance of hard drives and alerts the user of any potential problems or failures. S.M.A.R.T. can detect various indicators of drive degradation, such as bad sectors, read/write errors, temperature, or spin-up time. If a S.M.A.R.T. error is reported, it means that the drive has exceeded a predefined threshold of acceptable operation and is likely to fail soon. The drive may still function normally for a while, but it is recommended to back up the data and replace the drive as soon as possible to avoid data loss or system downtime.

A VLAN needs to be configured within a virtual environment for a new VM. Which of the following will ensure the VM receives a correct IP address?

1. A. A virtual router
2. B. A host NIC
3. C. A VPN
4. D. A virtual switch
5. E. A vNlC

Correct Answer: D
The correct answer is D. A virtual switch.
A virtual switch is a software-based network device that connects the virtual machines (VMs) in a virtual environment and allows them to communicate with each other and with the physical network. A virtual switch can also create and manage virtual LANs (VLANs), which are logical segments of a network that separate the traffic of different VMs or groups of VMs. A VLAN needs a DHCP server to assign IP addresses to the VMs that belong to it. A virtual switch can act as a DHCP relay agent and forward the DHCP requests from the VMs to the DHCP server on the physical network.This way, the VMs can receive correct IP addresses for their VLANs123
A virtual router is a software-based network device that routes packets between different networks or subnets. A virtual router can also create and manage VLANs, but it is not necessary for a VM to receive a correct IP address.A virtual router can be used to provide additional security, redundancy, or load balancing for the VMs12
A host NIC is a physical network interface card that connects the host machine to the physical network. A host NIC can also support VLAN tagging, which allows the host machine to communicate with different VLANs on the network. However, a host NIC alone cannot ensure that a VM receives a correct IP address for its VLAN.The host NIC needs to be connected to a virtual switch that can relay the DHCP requests from the VMs to the DHCP server12
A VPN is a virtual private network that creates a secure tunnel between two or more devices over the internet. A VPN can be used to encrypt and protect the data traffic of the VMs, but it is not related to the configuration of VLANs or IP addresses.A VPN does not affect how a VM receives a correct IP address for its VLAN14
A vNIC is a virtual network interface card that connects a VM to a virtual switch or a virtual router. A vNIC can also support VLAN tagging, which allows the VM to communicate with different VLANs on the network.However, a vNIC alone cannot ensure that a VM receives a correct IP address for its VLAN.The vNIC needs to be connected to a virtual switch or a virtual router that can relay the DHCP requests from the VMs to the DHCP server12

Users have noticed a server is performing below Baseline expectations. While diagnosing me server, an administrator discovers disk drive performance has degraded. The administrator checks the diagnostics on the RAID controller and sees the battery on me controller has gone bad. Which of the following is causing the poor performance on the RAID array?

1. A. The controller has disabled the write cache.
2. B. The controller cannot use all the available channels.
3. C. The drive array is corrupt.
4. D. The controller has lost its configuration.

Correct Answer: A
The write cache is a feature of some RAID controllers that allows them to temporarily store data in a fast memory buffer before writing it to the disk drives. This improves the performance and efficiency of write operations, especially for random and small writes. However, if the battery on the controller goes bad, the controller may disable the write cache to prevent data loss in case of a power failure. This can degrade the disk drive performance significantly, as every write operation will have to wait for the disk drives to complete. References: https://www.dell.com/support/kbdoc/en-us/000131486/understanding-raid-controller-battery-learn-cyclehttps://www.techrepublic.com/article/understanding-raid-controller-write-cache/