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Flashcards in Exam Deck (12):

Name three different hardware components that can be virtualised?

Virtual disks (SCSI)
Virtual ethernet
Virtual Serial adapter, USB
Virtual graphic card
Virtual Printer


What are the goals of virtualization?

- Add a layer of abstraction between the applications and the hardware.
- Enable a reduction in costs and complexity.
- Provide the isolation of computer resources for - improved reliability and security.
- Improve service levels and the quality of service
- Better align IT processes with business goals
- Eliminate redundancy in, and maximize the utilization of, IT infrastructures.


Name serveral different types of virtualisation.

- Application virtualization
- Server virtualization
- Desktop virtualization
- User virtualization
- Storage virtualization
- Network virtualization


Explain the difference between a Bare metal and an Hosted virtualisation

Bare Metal / Native (type 1)
directly on the hardware

Hosted (type 2)
Within an operating system


What are the footprints of ESXi 5.5, 6.0 and 6.5

ESXi 5.5 151,98 MB
ESXi 6.0 154,90 MB
ESXi 6.5 135,39 MB


Name some security consideration concerning VM's

Vm’s are easy to move
Vm’s are easy to copy (and steal)
Vm’s have new class of privileged users and administrators
Vm’s have multiple snapshots and backup data


What are the maxima vCore's, Ram and disksize of a VM?

128 vCore's
4TB Ram
62TB memory


Explain the difference between HA and FT.

High availability is commonly thought of as a way to ensure a resource stays available, but the resource may suffer from some minor downtime. For example, with Hyper-V you have high availability because in the event that a host fails, the guest OSs just stop—there's no time to migrate the active state to another host, so you have some downtime. This is the same with VMware HA. vMotion can't be used because the host just stops and there's no live memory to move. You therefore typically lose the in-memory application state with high availability.

Fault tolerance mean you don't lose the in-memory application state in the event of a failure such as a host crash. Fault Tolerance is much harder than high availability in a virtual environment because you have to maintain two copies of a virtual machine, each on separate hosts. As memory and device state change on the primary, these changes have to be recorded and replayed on the secondary copy at the same time.


What is the difference between a vSwitch and a vDistributed Switch?

A distributed switch is created for a cluster on the datacenter level whereas a virtual switch is made for a specific host.


What side would an administrator slide the conservative/agressive slider if he wanted to set the system to conservative.



Explain para-virtualisation

For example an USB with a VM on it. Advantages of this are mobility, however you cannot remove the USB while the VM is running.


Give the difinition of virtulisation.

Virtualization is the process of creating a software-based (or virtual) representation of something rather than a physical one. Virtualization can apply to applications, servers, storage, and networks and is the single most effective way to reduce IT expenses while boosting efficiency and agility for all size businesses.