Function of a Site-to-Site VPN

C

A Site-to-Site VPN gateway connection is used to connect your on-premises network to an Azure virtual network over an IPsec/IKE (IKEv1 or IKEv2) VPN tunnel.

This type of connection requires a VPN device located on-premises that has an externally facing public IP address assigned to it.

Example:

https://docs.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-howto-site-to-site-classic-portal

Vertical scaling in a cloud environment refers to the process of increasing the capacity of an individual resource, such as a virtual machine or an application, by adding more resources to it. This is also known as scaling up or upgrading. The main advantage of vertical scaling is that it allows you to increase the capacity of a single resource without changing the architecture of the entire system.

Option A, adding an additional CPU to an existing Azure virtual machine, is an example of vertical scaling in a cloud environment. When you add an additional CPU to a virtual machine, you increase its processing power, which allows it to handle more workloads and requests. This can be useful when you have a workload that requires more processing power than the current configuration can handle. By adding an additional CPU, you can improve the performance of the virtual machine without adding another virtual machine.

Option B, adding an additional Azure virtual machine, is an example of horizontal scaling in a cloud environment. Horizontal scaling refers to the process of adding more resources to a system by adding more instances of the same resource. When you add another virtual machine, you increase the capacity of the system by distributing the workload across multiple machines. This can be useful when you need to handle a larger number of requests than a single virtual machine can handle.

Option C, adding an additional Azure Virtual Desktop session host, is also an example of horizontal scaling. When you add another session host, you increase the capacity of the Virtual Desktop infrastructure by distributing the workload across multiple hosts. This can be useful when you need to support a larger number of users than a single session host can handle.

Option D, adding an additional Azure App Service instance automatically, is also an example of horizontal scaling. When you add another instance, you increase the capacity of the App Service by distributing the workload across multiple instances. This can be useful when you need to handle a larger number of requests than a single instance can handle.

In summary, the correct answer to the question is A, adding an additional CPU to an existing Azure virtual machine, as it is an example of vertical scaling in a cloud environment.

A Site-to-Site VPN (Virtual Private Network) is a type of VPN that connects two or more on-premises networks or a remote network to a virtual network in Azure. It creates a secure encrypted tunnel over the internet, allowing data to be transmitted securely between the two sites.

The function of a Site-to-Site VPN is to provide a secure and private connection between an on-premises network and a virtual network in Azure. This connection enables communication between the two networks as if they were connected locally, allowing resources in each network to be accessed from the other.

Option A is not accurate because a Site-to-Site VPN provides a secure connection between two networks, not a computer on a public network and the corporate network.

Option B is also not accurate because a Site-to-Site VPN is still a VPN that uses the internet as its underlying transport mechanism, and it does not provide a dedicated private connection to Azure that does not travel over the internet.

Option C is the correct answer because it accurately describes the function of a Site-to-Site VPN, which is to provide a connection from an on-premises VPN device to an Azure VPN gateway, allowing secure communication between the two networks.