CISCO 500-920 Cisco Data Center Unified Computing Infrastructure Troubleshooting (DCITUC) Free Practice Test — 30 Questions

Question 1

In a data center environment, a compliance officer is tasked with ensuring that the organization adheres to the Payment Card Industry Data Security Standard (PCI DSS). The organization processes credit card transactions and must maintain a secure network. The officer identifies several areas of concern, including the encryption of cardholder data, access control measures, and regular security testing. Which of the following actions would best ensure compliance with PCI DSS requirements while also enhancing the overall security posture of the organization?

Accepted Answer

Implementing strong encryption protocols for cardholder data both at rest and in transit, along with regular vulnerability scans and penetration testing.

Question 2

In a network utilizing Spanning Tree Protocol (STP), a network engineer is troubleshooting a situation where a switch is not transitioning to the forwarding state. The engineer discovers that the switch is receiving Bridge Protocol Data Units (BPDUs) from another switch that has a lower Bridge ID. Given that the switch in question has a configured priority of 32768 and a MAC address of 00:1A:2B:3C:4D:5E, while the neighboring switch has a priority of 20480 and a MAC address of 00:1A:2B:3C:4D:5F, what is the reason for the switch not transitioning to the forwarding state, and what steps should be taken to resolve this issue?

Accepted Answer

The neighboring switch has a lower Bridge ID, causing the local switch to remain in the blocking state; the local switch's priority should be lowered to become the root bridge.

Question 3

In a data center environment, you are tasked with setting up alerts for monitoring the performance of your Unified Computing System (UCS). You need to ensure that alerts are triggered based on specific thresholds for CPU utilization, memory usage, and network traffic. If the CPU utilization exceeds 85%, memory usage exceeds 75%, or network traffic exceeds 100 Mbps, an alert should be generated. Given that the CPU utilization is currently at 90%, memory usage at 70%, and network traffic at 110 Mbps, which of the following configurations would best ensure that alerts are sent out correctly based on these conditions?

Accepted Answer

Set up alerts for CPU utilization at 85%, memory usage at 75%, and network traffic at 100 Mbps, ensuring that all thresholds are configured to trigger alerts when exceeded.

Question 4

A data center administrator is tasked with updating the firmware of a Cisco Unified Computing System (UCS) to enhance security and performance. The current firmware version is 3.0(1a), and the latest available version is 3.1(2b). The administrator must ensure that the update process is seamless and does not disrupt ongoing operations. Which of the following steps should the administrator prioritize to ensure a successful firmware update while minimizing downtime?

Accepted Answer

Verify compatibility of the new firmware with existing hardware and software configurations before proceeding with the update.

Question 5

A data center is experiencing overheating issues due to inadequate cooling. The facility has a total power consumption of 100 kW, and the Power Usage Effectiveness (PUE) is measured at 1.8. If the cooling system is designed to operate at a PUE of 1.5, what is the additional cooling capacity required to achieve the desired PUE, assuming that the cooling system operates at a constant efficiency?

Accepted Answer

30 kW

Question 6

In a Cisco UCS Manager environment, you are tasked with configuring a service profile for a new blade server. The service profile must ensure that the server can access both local and remote storage. You need to configure the appropriate policies for vNICs and vHBAs, ensuring redundancy and optimal performance. Given that the UCS Manager allows for the configuration of multiple vNICs and vHBAs, which of the following configurations would best achieve this goal while adhering to best practices for high availability and load balancing?

Accepted Answer

Configure two vNICs with one connected to Fabric A and the other to Fabric B, and two vHBAs similarly connected, ensuring that each vNIC and vHBA pair is set to use the same VLAN and VSAN for consistency.

Question 7

In a data center environment, you are tasked with configuring boot policies for a new set of servers that will be deployed to run a critical application. The application requires a specific sequence of boot devices to ensure optimal performance and redundancy. You need to establish a boot policy that prioritizes local disk booting, followed by SAN booting, and finally PXE booting. Given the constraints of your infrastructure, which of the following configurations would best achieve this boot order while ensuring that the servers can recover from a failure in any of the boot methods?

Accepted Answer

Configure the boot policy to first attempt booting from the local disk, then from the SAN, and finally from the PXE server, with a timeout of 30 seconds for each method before moving to the next option.

Question 8

In a Cisco UCS environment, a network administrator is tasked with implementing security measures to protect the management traffic of the UCS Manager. The administrator decides to utilize role-based access control (RBAC) and secure communication protocols. Which combination of features should the administrator implement to ensure that only authorized personnel can access the UCS Manager while also encrypting the management traffic?

Accepted Answer

Implement RBAC with user roles and enable SSL for management traffic encryption.

Question 9

A company is planning to implement a Storage Area Network (SAN) to enhance its data storage capabilities. They are considering two different configurations: one using Fibre Channel (FC) and the other using iSCSI. The SAN will support a total of 100 virtual machines (VMs), each requiring 100 GB of storage. The company needs to determine the total bandwidth required for each configuration, considering that the average read/write operation per VM is 50 IOPS (Input/Output Operations Per Second). If the Fibre Channel configuration supports 8 Gbps and iSCSI supports 1 Gbps, which configuration would provide sufficient bandwidth for the SAN, and how would you calculate the total bandwidth requirement?

Accepted Answer

Fibre Channel configuration is sufficient, requiring a total of 40 Gbps.

Question 10

In a Cisco UCS environment, you are tasked with configuring I/O modules to optimize network performance for a data center that supports both Ethernet and Fibre Channel traffic. The UCS system has two I/O modules installed, each capable of supporting up to 40 Gbps of throughput. If the total bandwidth required for Ethernet traffic is 60 Gbps and for Fibre Channel traffic is 30 Gbps, what is the minimum number of I/O modules required to handle this traffic without exceeding the capacity of the modules?

Accepted Answer

2

Question 11

A data center technician is troubleshooting a network connectivity issue where several virtual machines (VMs) are unable to communicate with each other. The technician follows a systematic troubleshooting methodology. After verifying the physical connections and ensuring that the network interfaces are up, the technician decides to analyze the network configuration. Which of the following steps should the technician prioritize next to effectively isolate the problem?

Accepted Answer

Review the VLAN configuration and ensure that all VMs are on the same VLAN.

Question 12

In a simulated UCS environment, you are tasked with configuring a service profile for a new application that requires a specific amount of CPU and memory resources. The application is expected to utilize 4 vCPUs and 16 GB of RAM. Given that each physical server in your UCS environment has 8 vCPUs and 32 GB of RAM, what is the maximum number of instances of this application that can be deployed on a single physical server without exceeding the available resources?

Accepted Answer

2

Question 13

In a Cisco UCS environment, you are tasked with upgrading the firmware of a UCS Manager and its associated components. You have a UCS domain with multiple blade servers, each running different versions of firmware. After reviewing the current firmware versions, you decide to implement a firmware upgrade strategy that minimizes downtime and ensures compatibility across all components. What is the most effective approach to manage the firmware upgrade process while ensuring that all components remain operational during the upgrade?

Accepted Answer

Use the UCS Manager to create a firmware baseline that includes the latest compatible firmware versions for all components and schedule a rolling upgrade for the blade servers.

Question 14

In a data center environment, a network engineer is troubleshooting connectivity issues between a Cisco UCS server and the storage network. The engineer uses the CLI to check the status of the Fibre Channel interfaces. After executing the command `show interface fc`, the output indicates that the interfaces are in a \"down\" state. What should the engineer do next to further diagnose the issue?

Accepted Answer

Execute the command `show logging` to check for any error messages related to the Fibre Channel interfaces.

Question 15

In a Cisco UCS environment, you are tasked with optimizing the performance of a data center that utilizes multiple I/O modules. The current configuration includes two Fabric Interconnects, each connected to various I/O modules. You notice that the throughput is not meeting the expected performance levels. After analyzing the traffic patterns, you determine that the bottleneck occurs during peak usage times, particularly with the network traffic. Given that each I/O module can support a maximum throughput of 40 Gbps, and you have a total of 4 I/O modules in use, what is the maximum theoretical throughput available for network traffic in this configuration, and how can you effectively distribute the load to avoid bottlenecks?

Accepted Answer

160 Gbps with load balancing across all I/O modules

Question 16

In a data center environment, a network engineer is troubleshooting connectivity issues between two servers that are supposed to communicate over VLAN 10. The engineer discovers that the servers are configured to be on different VLANs due to a misconfiguration in the switch ports. Server A is connected to a port configured for VLAN 20, while Server B is connected to a port configured for VLAN 10. What is the most likely outcome of this misconfiguration, and how can it be resolved?

Accepted Answer

Server A will not be able to communicate with Server B due to VLAN segregation; reconfiguring Server A's port to VLAN 10 will resolve the issue.

Question 17

In a Cisco UCS environment, you are tasked with configuring a service profile for a new blade server that will host a critical application. The application requires a specific amount of CPU and memory resources, as well as a dedicated network interface for optimal performance. The blade server has two CPUs, each with 8 cores, and you need to allocate 16 virtual CPUs (vCPUs) to the service profile. Additionally, the application requires 32 GB of RAM. Given that the UCS Manager allows for a maximum of 2 vNICs and 2 vHBAs per service profile, how would you configure the service profile to meet these requirements while ensuring redundancy and optimal resource allocation?

Accepted Answer

Allocate 16 vCPUs, assign 32 GB of RAM, configure 2 vNICs for network redundancy, and set up 2 vHBAs for storage access.

Question 18

In a data center environment, a storage administrator is tasked with monitoring storage logs to identify potential issues before they escalate. During a routine check, the administrator notices a series of alerts indicating that the storage system is experiencing high latency. The logs show that the average latency over the past hour has been fluctuating between 15 ms and 30 ms, with occasional spikes reaching up to 50 ms. Given that the acceptable latency threshold for the storage system is set at 20 ms, what should the administrator prioritize in their troubleshooting process to ensure optimal performance and prevent data loss?

Accepted Answer

Investigate the underlying causes of the latency spikes and assess the impact of concurrent workloads on storage performance.

Question 19

In a data center environment, a compliance officer is tasked with ensuring that the organization adheres to the Payment Card Industry Data Security Standard (PCI DSS). The officer must assess the current security measures in place and determine which of the following actions would best enhance compliance with PCI DSS requirements, particularly focusing on the protection of cardholder data. Which action should the officer prioritize to align with the compliance standards effectively?

Accepted Answer

Implementing strong access control measures to restrict access to cardholder data only to those individuals who need it for their job functions.

Question 20

In a data center environment, you are tasked with troubleshooting a network performance issue that has been reported by multiple users. The symptoms include high latency and packet loss during peak usage times. You decide to analyze the network traffic using a packet capture tool. After capturing the traffic, you notice that a significant amount of bandwidth is being consumed by a specific application that was not previously identified as a major user of resources. What is the most effective advanced troubleshooting technique to address this issue and ensure optimal network performance?

Accepted Answer

Implement Quality of Service (QoS) policies to prioritize critical applications and limit bandwidth for the identified application.

Question 21

A data center administrator is troubleshooting a network connectivity issue between two servers in a Cisco Unified Computing System (UCS) environment. The administrator notices that Server A can ping the default gateway but cannot reach Server B. Both servers are connected to the same VLAN and have been assigned IP addresses within the same subnet. The administrator checks the VLAN configuration and finds that it is correctly set up. However, upon inspecting the UCS Fabric Interconnect, the administrator discovers that the port connecting to Server B is in an \"err-disabled\" state. What is the most likely cause of this issue, and how should the administrator proceed to resolve it?

Accepted Answer

The port may have been disabled due to a security violation, and the administrator should check the port security settings and re-enable the port.

Question 22

A data center technician is troubleshooting a server that is experiencing intermittent connectivity issues. After running a series of hardware diagnostics, the technician discovers that the server\'s network interface card (NIC) is reporting a high number of CRC errors. What could be the most likely cause of these errors, and how should the technician proceed to resolve the issue?

Accepted Answer

The NIC is faulty and should be replaced.

Question 23

In a data center environment, a network engineer is tasked with integrating a new Unified Computing System (UCS) with an existing VMware vSphere infrastructure. The engineer needs to ensure that the UCS can effectively communicate with the vCenter Server for optimal resource management and monitoring. Which of the following steps is crucial for establishing this integration successfully?

Accepted Answer

Configuring the UCS Manager to use the vCenter Server's API for resource management and monitoring.

Question 24

In a Cisco UCS environment, you are tasked with configuring a service profile for a new blade server. The service profile needs to be associated with a specific UUID and must include a vNIC template that allows for two virtual NICs, each configured for different VLANs. Additionally, you need to ensure that the service profile is set to automatically bind to the first available blade in the specified chassis. Given these requirements, which configuration steps must be taken to ensure that the service profile is correctly set up and operational?

Accepted Answer

Create a service profile, assign the desired UUID, configure a vNIC template with two virtual NICs for VLANs, and set the binding policy to "Auto Bind" for the specified chassis.

Question 25

In a data center environment, you are tasked with configuring a new Cisco Unified Computing System (UCS) for optimal performance and security. After completing the initial hardware setup, you need to establish a management network for the UCS Manager. You decide to configure the management IP address, subnet mask, and default gateway. If the management IP address is set to 192.168.1.10, the subnet mask is 255.255.255.0, and the default gateway is 192.168.1.1, what is the correct configuration step to ensure that the UCS Manager can communicate with devices outside its local subnet?

Accepted Answer

Configure the default gateway to allow traffic to be routed outside the local subnet.

Question 26

In a Cisco UCS environment, you are tasked with designing a server architecture that optimally utilizes resources while ensuring high availability and scalability. You have a requirement for a system that can support a maximum of 160 virtual machines (VMs) with an average of 8 VMs per physical server. Each server is equipped with 256 GB of RAM, and you need to ensure that the memory allocation allows for efficient performance. Given that each VM requires 16 GB of RAM, how many physical servers will you need to deploy to meet the requirements while also considering a 20% overhead for memory allocation?

Accepted Answer

10 servers

Question 27

In a data center environment utilizing UCS Manager, a network administrator is tasked with generating a report to analyze the performance metrics of various service profiles over the last month. The administrator needs to identify which service profiles have experienced the highest CPU utilization and memory consumption. Given that the UCS Manager can generate reports based on specific criteria, which approach should the administrator take to ensure the report accurately reflects the desired metrics while also considering the potential impact of resource allocation on overall system performance?

Accepted Answer

Utilize the UCS Manager's reporting feature to filter service profiles by CPU and memory utilization metrics, ensuring to set the time frame to the last month and include both average and peak utilization statistics in the report.

Question 28

A healthcare organization is implementing a new electronic health record (EHR) system that will store sensitive patient information. The organization is required to comply with HIPAA, PCI-DSS, and GDPR regulations. During the risk assessment phase, the compliance team identifies several potential vulnerabilities related to data access and encryption. Which of the following strategies should the organization prioritize to ensure compliance with these regulations while minimizing the risk of data breaches?

Accepted Answer

Implementing end-to-end encryption for all patient data both at rest and in transit.

Question 29

In a data center environment, you are tasked with diagnosing a network connectivity issue affecting multiple virtual machines (VMs) hosted on a Cisco Unified Computing System (UCS). You decide to utilize the UCS Manager\'s troubleshooting tools to analyze the problem. After running a series of diagnostics, you observe that the VMs are unable to communicate with the external network, but they can communicate with each other. Which of the following troubleshooting steps should you prioritize to identify the root cause of the connectivity issue?

Accepted Answer

Check the VLAN configuration on the UCS Fabric Interconnects to ensure the correct VLAN is assigned to the VMs' port profiles.

Question 30

A financial institution recently experienced a data breach that compromised sensitive customer information, including Social Security numbers and credit card details. In response, the organization is evaluating its incident response plan and considering the implementation of a new data encryption strategy. Which of the following actions should be prioritized to mitigate the risk of future breaches while ensuring compliance with regulations such as the General Data Protection Regulation (GDPR) and the Payment Card Industry Data Security Standard (PCI DSS)?

Accepted Answer

Implementing end-to-end encryption for all sensitive data both at rest and in transit.

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