2V0-621 Online Practice Questions and Answers

Correct Answer: ABC

Explanation: Please find link to understand more about the connectivity issues https://kb.vmware.com/ selfservice/microsites/search.do?language=en_USandcmd=displayKCandexternalId=1003893

Correct Answer: BD

Determine whether the high ready time for the virtual machine resulted from its CPU usage time reaching the CPU limit setting. If so, increase the CPU limit on the virtual machine.

Increase the CPU shares to give the virtual machine more opportunities to run. The total ready time on the host might remain at the same level if the host system is constrained by CPU. If the host ready time doesn't decrease, set the CPU reservations for high-priority virtual machines to guarantee that they receive the required CPU cycles.

Reference: https://pubs.vmware.com/vsphere-4-esx-vcenter/index.jsp?topic=/com.vmware.vsphere.dcadmin.doc_41/ vsp_dc_admin_guide/performance_statistics/c_troubleshoot_cpu.html

Correct Answer: B

Explanation: LACP Limitations on a vSphere Distributed Switch Link Aggregation Control Protocol (LACP) on a vSphere distributed switch allows network devices to negotiate automatic bundling of links by sending LACP packets to a peer. However, there are some limitations when using LACP with a vSphere distributed switch.

1.

LACP only works with IP Hash load balancing and Link Status Network failover detection.

2.

LACP is not compatible with iSCSI software multipathing.

3.

vSphere only supports one LACP group per distributed switch, and only one LACP group per host.

4.

LACP settings do not exist in host profiles.

5.

LACP between two nested ESXi hosts is not possible.

6.

LACP does not work with port mirroring.

Reference: https://pubs.vmware.com/vsphere-51/index.jsp?topic=% 2Fcom.vmware.vsphere.networking.doc%2FGUID-3FDE1E96-9217-4FE6-8B76-6E3A64766828.html

Correct Answer: A

Procedure

1.Select the datastore to grow and click the Increase Datastore Capacity icon.

2.Select a device from the list of storage devices.

Your selection depends on whether an expandable storage device is available.

Choose the options from Drop down menu list:

Check the link:

https://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vsphere.storage.doc%2FGUIDD57FEF5D-75F1-433D-B337-E760732282FC.html

Correct Answer: CD

Removing Unnecessary Hardware Devices Any enabled or connected device represents a potential attack channel. Users and processes without privileges on a virtual machine can connect or disconnect hardware devices, such as network adapters and CD-ROM drives. Attackers can use this capability to breach virtual machine security. Removing unnecessary hardware devices can help prevent attacks. Use the following guidelines to increase virtual machine security.

1.

Ensure that unauthorized devices are not connected and remove any unneeded or unused hardware devices.

2.

Disable unnecessary virtual devices from within a virtual machine. An attacker with access to a virtual machine can connect a disconnected CD-ROM drive and access sensitive information on the media left in the drive, or disconnect a network adapter to isolate the virtual machine from its network, resulting in a denial of service.

3.

Ensure that no device is connected to a virtual machine if it is not required. Serial and parallel ports are rarely used for virtual machines in a datacenter environment, and CD/DVD drives are usually connected only temporarily during software installation.

4.

For less commonly used devices that are not required, either the parameter should not be present or its value must be false. Ensure that the following parameters are either not present or set to false unless the device is required.

Reference: https://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vsphere.security.doc%2FGUID822B2ED3-D8D2-4F57-8335-CA46E915A729.html

Correct Answer: A

Global Permissions Global permissions are applied to a global root object that spans solutions, for example, both vCenter Server and vCenter Orchestrator. Use global permissions to give a user or group privileges for all objects in all object hierarchies. Each solution has a root object in its own object hierarchy. The global root object acts as a parent object to each solution object. You can assign global permissions to users or groups, and decide on the role for each user or group. The role determines the set of privileges. You can assign a predefined role or create custom roles. See Using Roles to Assign Privileges. It is important to distinguish between vCenter Server permissions and global permissions.

Reference: https://pubs.vmware.com/vsphere-60/index.jsp?topic=%2Fcom.vmware.vsphere.security.doc%2FGUIDC7702E31-1623-4189-89CB-E1136AA27972.html

Correct Answer: AB

In normal lockdown mode the DCUI service is not stopped. If the connection to the vCenter Server is lost and access through the vSphere Web Client is no longer available, privileged accounts can log in to the ESXi host's Direct Console Interface and exit lockdown mode. Only these accounts can access the Direct Console User Interface:

1.

Accounts in the Exception User list for lockdown mode who have administrative privileges on the host. The Exception Users list is meant for service accounts that perform very specific tasks. Adding ESXi administrators to this list defeats the purpose of lockdown mode.

2.

Users defined in the DCUI.Access advanced option for the host. This option is for emergency access to the Direct Console Interface in case the connection to vCenter Server is lost. These users do not require administrative privileges on the host.

Reference: https://kb.vmware.com/selfservice/microsites/search.do? language=en_USandcmd=displayKCandexternalId=1008077

Correct Answer: A

Reference: https://pubs.vmware.com/vsphere-60/index.jsp?topic=%2Fcom.vmware.vsphere.vm_admin.doc%2FGUID18F4B892-D685-4473-AC25-3195D68DFD90.html

Correct Answer: C

Reference: https://pubs.vmware.com/vsphere50/index.jsp?topic=%2Fcom.vmware.vcli.ref.doc_50% 2Fesxcli_storage.html

Correct Answer: ABC

Explanation: Please refer to this link to troubleshoot this issue: https://kb.vmware.com/selfservice/ microsites/search.do?language=en_USandcmd=displayKCandexternalId=1004382