Chapter_1

Question 1

Explain type 1 and 2 hypervisors

Answer 1

Type 1 hypervisor runs directly on system hardware (is also called bare metal) .Type 2 hypservisors requires a host operating system,like Microsoft OS.

Question 2

What is VMkernal?

Answer 2

Vmkernal manages the virtual machines access to the underlying physical hardware. It manages CPUs, memory managment and virtual switch.

Question 3

Maximum resource for Vsphere 6

Answer 3

VMs = 4096
Number of logical CPUS = 320
Number of virtual CPUS per core 32
Amount of RAM per host = 6 TB

Question 4

What is a VCenter

Answer 4

VCenter allows administrators to manage, deploy, automate and secure a virtual infrastructure in a central location called VCenter.

Question 5

What is Enhanced vMotion Compatibility(EVC)

Answer 5

EVC mode allows VMs to move across host running different CPUs.

Question 6

What is host profile?

Answer 6

To help maintain consistent all all esxi host. Host profile can be utilized.

Question 7

What is Vsphere virtual symmetric multi-processing

Answer 7

it allows you to construct VMs with multiple processor cores and or sockets.

Question 8

DRS (Distributed Resource Scheduler) function

Answer 8

First part of DRS is called intelligent placement. Its places VM to a cluster that is best suited to run that Vm. DRS helps to balance CPU and memory usage across a cluster of esxi host.

Question 9

Vsphere Storage DRS

Answer 9

Storage DRS helps balance storage capacity and storage performance across a cluster.

Question 10

Policy based storage

Answer 10

is use to ensure VMs reside on storage that provides the necessary levels of capacity, performance and availability. It relies on two key points:
A- Storage capabilities-provided by storage array.
B- VM storage profiles-defines the storage requirements for a VM and its virtual disk.

Question 11

Vsphere high availability(HA)

Answer 11

In case of host failure, HA shuts down VM and migrate to another host. HA doesnt use VM motion technology to migrate in case of host failure. VMmotion only works on planned migration.

Question 12

Vsphere Fault Tolerance(FT)

Answer 12

FT eliminates any downtime. FT maintains a mirrored secondary VM, so that if the physical host for the primary VM fails, the FT will automatically recreate the secondary mirrored VM. It also requires EVC mode enabled.

Question 13

VDP(VMware Data protection)

Answer 13

VDP leverages VADP to provide full backup solution for smaller VMware environments.

Question 14

Virtual SAN(VSAN)

Answer 14

It leverages the internal storage and turn into a VSAN. Requires at least 3 Esxi host or nodes and can scale as many as 32. VSAN also provides Solid State storage each of the compute nodes to help improve I/O performance.

Question 15

VSphere Replication

Answer 15

enables to replicate VMs from one vsphere to another vsphere.

Question 16

VSphere Flash Read Cache

Answer 16

It allows you to leverage host local SSDs and turn that in to a caching layer for your virtual machines. Just a couple of things before we get in to configuring it. vFlash aggregates local flash devices in to a pool, this pool is referred too as a “virtual flash resource” in our documentation. So in other words, if you have 4 x 200 GB SSD you end up with a 800GB virtual flash resource. This virtual flash resource has a filesystem sitting on top of it called “VFFS” aka “Virtual Flash File System”.