VMware VMware Certifications 2VB-601 Questions & Answers

• Question 71:

  When using vSAN in a two-node direct connect configuration, how do data nodes communicate with the vSAN witness appliance?

  A. The vCenter Server acts as a proxy between data nodes and the vSAN witness.

  B. An alternate VMkernel interface that has connectivity to the vSAN witness must be tagged with a vSAN traffic type of "witness" VM

  C. Two-node direct connect does NOT require connectivity to the vSAN witness appliance.

  D. If the data node management VMkernel interfaces that are tagged for management traffic only have connectivity with the vSAN witness, they will provide communication with the vSAN witness.

  Correct Answer: B

  Traditional vSAN 2 Node configurations require connectivity between the vSAN tagged VMkernel ports, and the vSAN Witness Appliance's VSAN tagged VMkernel port. 2 Node Direct Connect Witness Traffic Separation provides the ability to directly connect vSAN data nodes in a 2 Node configuration. Traffic destined for the Witness host can be tagged on an alternative interface from the directly connected vSAN tagged interface.

• Question 72:

  A six-node all-flash vSAN cluster has been deployed. Deduplication and compression are enabled. All virtual machines are produced by policies with the rule Primary level of failures to tolerate set to 1.

  How is a vSAN disk group impacted when the cache device belonging to that disk group fails?

  A. The capacity devices are automatically reassigned to another disk group in the same host.

  B. The cache device is marked "Absent". A capacity device is automatically promoted to a cache device to minimize downtime.

  C. The cache device is marked "Degraded". The disk group remains online with lower performance levels.

  D. The disk group is taken offline.

  Correct Answer: A

  When a flash caching device fails, vSAN evaluates the accessibility of the objects on the disk group that contains the cache device, and rebuilds them on another host if possible and the Primary level of failures to tolerate is set to 1 or more.

• Question 73:

  vSAN storage policies can be created from which three of the listed vSAN rules? (Choose three.)

  A. Compression/Deduplication enabled/disabled

  B. Disable object checksum

  C. Primary level of failures to tolerate

  D. Replication enabled/disabled

  E. Force provisioning

  Correct Answer: BCE

  

  B: Checksum vSAN 6.2 includes End-to-End Software checksum to help avoid data integrity issues that may arise in the underlying disks. By default, checksum is enabled in version 6.2 but can be explicitly disabled via a storage policy setting. Software checksum can be disabled by completing the following procedure.

  1.

  From the vSphere Web Client, click Policies and Profiles and Select VM Storage Policies.

  2.

  Select a Virtual Machine Policy.

  3.

  Right click and Select "Edit Settings"

  4.

  From the Rule-Set 1 screen, select "Add rule"

  5.

  Select "Disable object checksum" from the drop down list

  References:https://storagehub.vmware.com/export_to_pdf/storage-policies-and-vsan

• Question 74:

  A cache tier device experiences a permanent disk failure.

  Which of the below represents a valid process for replacing the failed disk?

  A. 1. The hot spare disk replaces the failed disk immediately.

  2. Physically replace the failed disk.

  B. 1. Using the vSphere Web Client, replace the failed disk with the hot spare disk.

  2. Physically replace the failed disk.

  C. 1. Using the vSphere Web Client, delete the failed disk from the vSAN cluster.

  2.

  Physically replace the failed disk.

  3.

  Using the vSphere Web Client, re-create the disk group.

  D. 1. Physically replace the failed disk and vSAN automatically takes care of the rest of the process.

  Correct Answer: C

  When a flash device failure occurs, before physically removing the device from a host, you must decommission the device from Virtual SAN. The decommission process performs a number of operations in order to discard disk group memberships, deletes partitions and remove stale data from all disks.

  How to do it. Flash Device Decommission Procedure from the vSphere Web Client Log on to the vSphere Web Client Navigate to the Hosts and Clusters view and select the cluster object Go to the manage tab and select Disk management under the Virtual SAN section Select the disk group with the failed flash device Select the failed flash device and click the delete button

  References:https://blogs.vmware.com/storage/2014/12/02/vmware-virtual-san-operations-replacing-diskdevices/

• Question 75:

  Which are two functions of software checksums in a vSAN environment? (Choose two.)

  A. Limit the number of IOPS that an object can consume

  B. Perform disk scrubbing in the background

  C. Limit the number of reads to the capacity tiered disks

  D. Automatically detect and resolve silent disk errors

  Correct Answer: BD

  Software checksums which will perform the following checks:

  1.

  Write failures to disks

  2.

  Network copy failures

  3.

  Checksum failures ?will fetch data from another copy.

  4.

  Disk Scrubbing will run in the background

  5.

  Enables additional level of data integrity

  6.

  Automatically detects and solve silent disk errors

  References: https://www.vladan.fr/vmware-vsan-6-2/

• Question 76:

  Which of the listed three vSAN features provide space efficiency? (Choose three.)

  A. Checksum

  B. Two-node cluster

  C. Sparse swap files

  D. RAID-5/6 erasure coding

  E. Deduplication and compression

  Correct Answer: CDE

  One of the Space Efficiency features of Virtual SAN 6.2 that is available for both All-Flash and Hybrid configurations, is the introduction of Sparse Virtual Swap files. Swap files on Virtual SAN by default, are created with the .vswp 100% reserved. In a thin provisioned/guaranteed capacity perspective, it could be said that they are effectively Lazy Zeroed Thick (LZT).

  RAID-5/6 erasure coding is a space efficiency feature optimized for all-flash configurations of Virtual SAN

  6.2.

  Virtual SAN 6.2 introduces space efficiency features optimized for modern all-flash storage, designed to

  minimize storage capacity consumption while ensuring availability. One of these features is near-line

  deduplication and compression.

  References:

  https://blogs.vmware.com/virtualblocks/2016/02/24/vsan62-powercli-sparse-vswp/

  https://www.vmware.com/files/pdf/products/vsan/vmware-vsan-62-space-efficiency-technologies.pdf

• Question 77:

  Which three virtual machine file types are contained in a VM home namespace object in a vSAN cluster? (Choose three.)

  A. .vmx

  B. .swap

  C. .log

  D. .memory

  E. .nvram

  Correct Answer: ACE

  The virtual machine home directory where all virtual machine configuration files are stored, such as .vmx, log files, vmdks, and snapshot delta description files. The VM Home Namespace is where we store all the virtual machine configuration files, such as the .vmx, .log, digest files, memory snapshots, etc.

  The .nvram file: this is the file that stores the state of the virtual machine's BIOS. This file is stored in the same directory as the .vmx file.

  Reference: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-1D8956A23F46-49C8-9231-38F3A9D09A0F.html

• Question 78:

  Which two are vSAN networking best practices? (Choose two.)

  A. Enable NIOC when not using dedicated network connections for vSAN networking traffic.

  B. Use two or more vSAN VMkernel ports on the same subnet to configure MPIO.

  C. Use 3 or more network connections for a vSAN VMkernel Port.

  D. For hybrid configurations, use dedicated 1Gbps network connections or 10 Gbps shared network connections.

  Correct Answer: AD

  A: If you use a shared 10-GbE network adapter, place the vSAN traffic on a distributed switch and configure Network I/O Control to guarantee bandwidth to vSAN.

  D: For hybrid configurations, dedicate at least 1-GbE physical network adapter. Place vSAN traffic on a dedicated or shared 10-GbE physical adapter for best networking performance.

  References: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-7BDE36E12F06-4699-8D83-3694A0E638B5.html

• Question 79:

  Storage policies can be based on which two types of rules? (Choose two.)

  A. Data services provided by hosts.

  B. Datastore placement provided by Storage DRS.

  C. Data services provided by datastores.

  D. Data services provided by virtual machines.

  Correct Answer: AC

  References: https://www.virtualizationhowto.com/2017/10/using-vmware-vm-storage-policies/

• Question 80:

  Which three objects that belong to virtual machines are contained in a vSAN datastore? (Choose three.)

  A. VM Health Status

  B. VMDK

  C. VM Home Namespace

  D. Performance Statistics

  E. VM Swap

  Correct Answer: BCE

  Reference: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.virtualsan.doc/GUID-1D8956A23F46-49C8-9231-38F3A9D09A0F.html