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AZ-300 > Virtual Machines > Flashcards

Virtual Machines Flashcards

1
Q

How can you provide redundancy and improve performance when using VMs?

A

Use Scale Sets

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2
Q

What OSI-Layer do load balancers work on?

A

Layer 4 (Transport)

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3
Q

What constitutes an Internal Load Balancer?

A

Has a private IP address. No public IP address

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4
Q

What constitutes a Public Load Balancer?

A

Has a public IP address

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5
Q

How can you simply create a NAT gateway?

A

Use a PUBLIC Load Balancer

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6
Q

What is an Application Gateway?

A

It’s a web traffic load balancer

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7
Q

What ISO-Layer do Application Gateways work on?

A

Layer 7 (Application)

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8
Q

What is Source IP Affinity Mode?

A

All requests from same IP goes to the same VM

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9
Q

Why is it not recommended to use Source IP Affinity Mode?

A

Good for applications that are stateful but not recommended for stateless applications. Not efficient.

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10
Q

What is ExpressRoute?

A

ExpressRoute extends your on-premises networks into Azure over a PRIVATE connection (SITE-TO-SITE)

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11
Q

What is a VPN Gateway?

A

It is a SITE-TO-SITE connection over the PUBLIC internet

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12
Q

What is VNET peering?

A

Connect 2 VNETs together

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13
Q

What is a Fault Domain?

A

Physical Racks within a data center

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14
Q

By default, how many fault domains are there in a Scale Set?

A

3

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15
Q

What is an Update Domain?

A

Is a logical group of underlying hardware that can undergo maintenance or be rebooted at the same time

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16
Q

By default, how many update Domains are there in a scale set?

A

5

17
Q

What is an Availability Zone?

A

Unique physical locations within a region. Each zone is made up of one or more datacenters.

18
Q

What is an Azure Region?

A

A set of datacenters deployed within a latency-defined perimeter.

19
Q

What is a Traffic Manager?

A

Is a DNS-based traffic load balancer

20
Q

How many types of routing is there for Traffic Managers?

A

6

21
Q

What is Performance Routing for Traffic Managers?

A

Routes to the closest VM

22
Q

What is Priority Routing for Traffic Managers?

A

Routes to the closest if MAIN VM is lost

23
Q

What is Weighted Routing for Traffic Managers?

A

Routes based on weights

24
Q

What is Geographic Routing for Traffic Managers?

A

Route based on user location

25
Q

What is Multivalue Routing for Traffic Managers?

A

Route only using IPv4/IPv6 addresses

26
Q

What is CloudInit?

A

Used during Linux OS start-up for custom initialisation

27
Q

What 2 things belong to an Azure Subnet?

A

NIC and an NSG

28
Q

Can a VM be moved from one resource group to another?

A

No. You have to delete it and then re-create it on the other Resource Group

29
Q

How many availability zones are there in a region?

A

3

AZ-300 (5 decks)

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