AWS Hypervisors Flashcards Preview

A Cloud Guru - AWS SysOps Administrator Associate (2019) > AWS Hypervisors > Flashcards

Flashcards in AWS Hypervisors Deck (17)
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1
Q

What is a hypervisor, or virtual machine monitor (VMM)?

A

A computer software, firmware, or hardware that creates and runs virtual machines.

2
Q

What is a computer that runs one or more virtual machines?

A

a host machine

3
Q

What is a virtual machine on a host machine called?

A

a guest machine

4
Q

Which hypervisor technology does AWS use?

A

Xen (although C5 instances may use KVM)

5
Q

Are guest VMs aware of other VMs?

A

No. They have no interaction with each other.

6
Q

How are customers isolated in AWS?

A

By the firewall

7
Q

What are the layers of isolation?

A

Physical interface, firewall, security groups, virtual interface, hypervisor, customer accounts

8
Q

Who is responsible for access to the AWS hypervisor?

A

AWS.

9
Q

Does AWS log all access into the AWS management console?

A

yes

10
Q

Who is responsible for guest access into an EC2 instance?

A

The customer

11
Q

If you lose access into your EC2 instance, never fear, AWS has access to the EC2, your passwords, and certificates. True or False?

A

False. AWS has no access to your EC2 instances.

12
Q

What is memory scrubbing?

A

EBS resets every block of storage used to ensure data is never exposed to another customer. Memory is not returned to the pool until each block is set to 0

13
Q

What is the prefered choice? HVM or PV?

A

HVM wheverever possible

14
Q

What does HVM stand for?

A

Hardware virtualized machine

15
Q

what does PV stand for?

A

paravirtualization

16
Q

How does isolation work in PV?

A

by layers, or rings, where the hypervisor is ring 0, guest OS is ring 1, the application is ring 2

17
Q

Who has access to AWS hypervisors?

A

AWS administrators