Master Azure Load Balancers and Virtual Machines

20 Questions

Which of the following is NOT one of the main benefits of using auto scaling?

Network security

What is the mandatory name for the special subnet that VPN gateways always connect to?

GatewaySubnet

How can you connect two V-NETs together using VPN gateways?

Create a VPN gateway in each V-NET

Which connection type enables any on-premises resource to access a V-NET?

Site-to-site VPN

Which connection type provides encrypted communication over the internet between a single PC and the V-NET?

Point-to-site VPN

Which connection type is private and does not traverse the internet?

Azure ExpressRoute

Which option can be used to filter network traffic between subnets in Azure?

All of the above

Where can network security groups be applied in Azure?

Network interfaces or to a full subnet

What type of traffic do network security groups work for?

Traffic within a V-NET

What should be considered when troubleshooting network issues related to network security groups?

Misconfigured network security groups may block or allow unwanted traffic

Which type of load balancer is recommended because it includes additional features like H-A ports and HTTPS health probes?

Standard load balancer

Which type of load balancer can load balance traffic across multiple availability zones?

Standard load balancer

Which type of load balancer can load balance only inside the availability zone?

Basic load balancer

What is the Azure feature that prevents destination NAT from being translated and requires the destination VM to reply directly to the source IP-address?

Direct server returns

What does Auto Scaling allow you to do in terms of the number of FortiGate VMs?

Dynamically grow and shrink

What are the benefits of using Auto Scaling?

Fault tolerance, availability, and cost management

What can you add to the back-end pool members of a load balancer?

VMs, scale sets, or availability sets

What is the purpose of a virtual machine scale set (VMSS)?

To dynamically grow and shrink a group of FortiGate VMs

What is the recommended type of load balancer for applications?

External/public load balancer

What is the recommended type of load balancer for the database subnet?

Internal load balancer

Study Notes

Autoscaling and Load Balancing

Autoscaling allows you to automatically increase or decrease the number of FortiGate VMs based on demand.
Benefits of using Autoscaling include:
- Reduced administrative burden
- Increased application availability
- Cost savings
Autoscaling is not suitable for applications that require a fixed number of instances.

VPN Gateways and Connections

A VPN gateway always connects to a special subnet called the "GatewaySubnet".
To connect two V-NETs together using VPN gateways, a VPN connection is established between the two gateways.
ExpressRoute connections enable any on-premises resource to access a V-NET.
Point-to-Site (P2S) VPN connections provide encrypted communication over the internet between a single PC and the V-NET.
Site-to-Site (S2S) VPN connections are private and do not traverse the internet.

Network Security Groups (NSGs)

Network Security Groups can be applied to subnets, NICs, and individual VMs.
NSGs work for inbound and outbound traffic.
When troubleshooting network issues related to NSGs, consider the NSG rules, the security group configuration, and the network configuration.

Load Balancers

Application Gateway is a type of load balancer that includes additional features like H-A ports and HTTPS health probes.
Azure Load Balancer can load balance traffic across multiple availability zones.
Basic Load Balancer can load balance only inside the availability zone.
The Azure feature that prevents destination NAT from being translated and requires the destination VM to reply directly to the source IP-address is called "Floating IP".

Virtual Machine Scale Sets (VMSS)

A Virtual Machine Scale Set (VMSS) allows you to create and manage a group of identical VMs.
The purpose of a VMSS is to provide high availability and scalability for applications.

Load Balancer Back-end Pool Members

You can add VMs, VMSS, or availability sets to the back-end pool members of a load balancer.

Recommended Load Balancers

Application Gateway is the recommended type of load balancer for applications.
Azure Load Balancer is the recommended type of load balancer for the database subnet.

Test your knowledge on Azure Load Balancers and Virtual Machines. Learn about different types of load balancers and their capabilities, such as standard load balancers that can balance traffic across multiple availability zones. Find out why it is recommended to use standard load balancers for additional features like H-A ports and HTTPS healing.

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