VMware NSX Interview Questions and Answers

Q1 : What is Service Console?
A : The service console is developed based upon Redhat Linux Operating system, it is used to manage the VMKernel.
Q2 : What is vCenter Agent?
A : VC agent is an agent installed on ESX server which enables communication between VC and ESX server. This Agent will be installed on ESX/ESXi will be done when you try to add the ESx host in Vcenter.

Q3 : What’s the employment of Service Console port?
A : Service console port cluster needed to manage the ESX server and it
acts because of the management network for the ESX.
vCenter/vSphere shopper uses the service console IP’s to speak with the
ESX server. this can be one in every of the commonly asked VMware
interview queries.

Q4 : What’s a VLAN?
A : A VLAN is that the VIRTUAL LAN that is employed to bust down the
printed traffic into several logical teams. Basically, one physical switch comprises of
1 broadcast domain. VLAN accustomed separate the one broadcast domain
into several little items to separate the networks inside the printed domain.

Q5 : What are the basic commands to troubleshoot connectivity between vSphere Client /vCenter to ESX server?
A : service mgmt–vmware restart  (restarts host agent(vmware–hostd) on vmware esx server)
service vmware-vpxa restrat (restarts Vcenter agent service)
service network restart (restarts management networks on ESX)
Q6 : What’s mack Address changes?
A : All the virtual mand it’s keep in .VMX file. If the packet doesn’t match with
the mack addressachines nics area unit offer with the mack address at the
time of creation  as same as within the .VMX file ,
it doesn’t enable incoming traffic to the VM by setting this selection as reject.If it’s set as settle for,ESX accepts requests to vary the
effective mack address
to aside from the mack address save din the .VMX file.

Q7 : What’s the default variety of ports organized with the Virtual Switch?
A : When the time of Virtual switch created, Vswitch is made with fifty
six ports by default. we are able to extend the no of ports by piece of
writing the vswitch properties.

Q8 : What are the types of Ports groups in ESX/ESXi?
A : There are 3 types of port groups in ESX
Service console port group
VMkernel Port group
Virtual machine port group
There are only 2 types of port group in ESXi
Vmkernel Port group
Virtual Machine Port group
Q9 : What’s the employment of Virtual Machine Port Group?
A  : Virtual Machine port cluster is employed by Virtual machine
communication.
Q10 : What’s Promiscuous Mode?
A : If the promiscuous mode set to just accept, all the communication is visible to all or
any the virtual machines, in different words all the packets area unit sent to all or
any the ports on vSwitch. It will be helpful after you area unit running virtual
machines with network sniffers to capture packet therein network.

Q11 : How are you able to use third-party backup tools in VMware?
A : There is associate inherent backup framework referred to as VCB (VMware

consolidate backup) that permits you to use third-party backup software package to

backup ESX virtual servers. VCB permits you to require each full

and progressive backups.

Apart from having centralized backups of all virtual servers, you’ll be able to take file

level furthermore as image-backups of ESX servers. During the image level backup,
the snap is completed that is traced on the backup server, un-snapping of copy is
completed and at last, you’ll be able to back the image with any third party software package.

Q12 : What area unit the protection choices accessible for ESX vswitch?
A : Promiscuous Mode – Reject

MAC Address changes – settle for

Forged Transmits – settle for

Q13 : What is the use of Service Console port?
A : Service console port group required to manage the ESX server and it acts as the management network for the ESX. vCenter/vSphere Client uses the service console IP’s to communicate with the ESX server. This is one of the frequently asked VMware interview questions.
Q14 : What are the Traffic Shaping policies available in the vSwitch?
A : Understanding the use-cases of Traffic shaping policies are very important part of VMware interview questions. Traffic shaping policies are disabled by default. There are 3 different traffic shaping policy setting
Average Bandwidth
Peak Bandwidth
Burst Size
Q15 : What is Forged Transmits?
A : Which is same as the Mac Address changes setting but it worked for the outgoing traffic but the MAC address changes setting is for incoming traffic.
Q16 : What is a VLAN?
A : A VLAN is the VIRTUAL LAN which is used to broke down the Broadcast traffic into many logical groups. Basically, one physical switch comprises of one broadcast domain. VLAN used to separate the one broadcast domain into many small pieces to separate the networks within the broadcast domain.
Q17 : What are the security options available for ESX vswitch?
A : Promiscuous Mode – Reject
MAC Address changes – Accept
Forged Transmits – Accept
Q18 : What are the types of VLAN tagging in Vsphere?
A : There are 3 types of VLAN tagging available in Vsphere.
Virtual Switch Tagging (VST)
External Switch Tagging (EST)
Virtual Guest Tagging (VGT)
Q19 : How is that the clone totally different from the guide in VMware?
A :
• guide is that the original of a Virtual machine and is employed to form copies
of alternative Virtual machines whereas a clone is simply the copy of Virtual
machine.
• A guide will get regenerate back to VM to update the master VM copy with latest
patches or updates however a clone, once created cannot be regenerate back to VM.

• biological research is of two types’ viz. Full clone and coupled clone.

Q20 : Explain the distinction between type1 and sort two hypervisors?
A : The type one hypervisor is put in directly on the server host and doesn’t need any

pre-installed OS. it’s additionally referred to as blank Metal hypervisor. The
hypervisor1 is little software package that is simple to put
in and doesn’t consume any system resources. the most objective of type1
hypervisor is to manage totally different resources
between operational systems put in on that. All the VMs and OS area
unit freelance of every alternative and downside in anybody VM doesn’t have an
effect on the opposite VMs.

Type 2, on the opposite hand, maybe put in solely on the software put in on the
host server and addicted to host OS for all its practicality. If OS gets corrupted, the
hypervisor and every one the VMs get affected.