VMWare

Question 1

What is a Hypervisor?

Answer 1

a process of segmenting the OS and applications of a computer through underlying physical hardware. It drives the concept of virtualization by allowing the physical host machine to act as guests for practical usage of computing resources such as network bandwidth, memory, and CPU cycles.

Question 2

What is vSphere

Answer 2

VMware suite is globally recognized as VMware vSphere, and it comprises of virtualization, management, and interface layers. The essential core components of VMware vSphere are the ESXi server and the vCenter Server.

Question 3

What is vCenter

Answer 3

VMware vCenter is the central management system for VMware Virtualization infrastructure. vCenter can accommodate thousands of ESXi hosts within the inventory which enables you to handle multiple ESXi hosts.

Question 4

What is RDM

Answer 4

Raw device Mapping
It allows the virtual machine to read and write from the storage, and it also contains metadata to manage and redirect disk to the physical device.

Question 5

ESXi Hardware versions

Answer 5

6. 0 - 11
7. 5 - 13
8. 7 - 14

Question 6

Difference between ESX and ESXi

Answer 6

ESXi doesn’t rely on the linux based ConsoleOS and has a smaller code base

Question 7

What is a .vmdk file?

Answer 7

it is the disk descriptor file that describes the size and geometry of the virtual disk file. This file is in text format and contains the name of the –flat.vmdk file for which it is associated with and also the hard drive adapter type, drive sectors, heads, and cylinders, etc.

Question 8

What is vMotion?

Answer 8

VMware VMotion enables the live migration of running virtual machines from one physical server to another with zero downtime.

• Good for Maintenance
• Move from underperforming server

Question 9

What is promiscuous mode in VMWare?

Answer 9

A security policy which can be defined at the virtual switch or port group level

Question 10

What is difference between Thick Provisioned Lazy Zero and Eager Zero? Thin provisioned?

Answer 10

• Space is allocated at create time
• With Eager Zero, data is zeroed out when the virtual disk is created giving better performance
• Thin provision doesn’t allocate the required space…it will grow as necessary

Question 11

What is a snapshot?

Answer 11

• “Point in Time” image of a VM.
• You can always return the VM back to that point in time
• Contains disk image, RAM, and devices

Question 12

What is VDI?

Answer 12

• Virtual Desktop Infrastructure
• End User physical machines are virtualized
• Uses thin clients
• You can use VMware Horizon View to connect to your desktop

Question 13

What is VMWare HA?

Answer 13

High Availability

• Configured on a cluster
• Will migrate and restart VMs on another host
• HA continuously monitors all the ESX servers in the cluster to detect failures

Question 14

What is Storage vMotion

Answer 14

VM Guest stays on the original host, but the storage is migrated to a new server

Question 15

What are the monitoring methods used for vSphere HA?

Answer 15

The Master and Slave hosts use two types of monitoring the status of the hosts

• Datastore Heartbeat
• Network Heartbeat

Question 16

What is the use of VMware tools?

Answer 16

VMware Tools is a suite of utilities that enhances the performance of the virtual machine’s guest operating system and improves management of the virtual machine.