This is the 18th day of my participation in the August Challenge

Regan Yue will take you to learn about Microsoft AZ-900 certification “Chapter IV”

21 – Question

And the answer is

  1. Disaster preparedness
  2. Fault tolerance
  3. Low latency
  4. The dynamic extension

The four Answer areas are:

  1. Cloud services that remain available after a failure occurs
  2. Cloud services that can be recovered after a failure
  3. Implement rapid cloud services when demand increases
  4. Cloud services that can be accessed quickly from the Internet.

21 – Answer

Fault tolerance is the ability to remain available after a component of a service fails. For example, a service running on multiple servers can withstand the failure of one of them.

Disaster recovery is the recovery of service faults. For example, restore a VM from a backup after a VM failure.

Dynamic scaling is the ability to add computing resources to a service when the service is heavily loaded. For example, in a VM cluster, additional VM instances are added when existing VMS are overloaded.

Latency is the time it takes for a service to respond to a request. For example, the time it takes to return a Web page from a Web server. Low latency means low response time, which means faster response.

22 – Question

22 – Answer

Title 1: It is not true that No companies must always migrate from their internal networks to implement hybrid clouds. You can start with a public cloud and then combine it with a local infrastructure to implement a hybrid cloud.

Title 2: Yes Enterprises can extend computing resources on their internal networks through the public cloud. This is very common. When you need more resources and don’t want to pay for a new local infrastructure, you can configure the cloud environment and use a VPN to connect your local network to the cloud environment.

Title 3: No Only guest users can access cloud resources. You can grant access to cloud resources to anyone with an Azure Active Directory account. There are many authentication schemes, but a common one is to copy a local Active Directory account to Azure Active Directory and provide Azure Active Directory account access.

23 – Question

Your company has a local network with multiple servers.

Your company plans to reduce the following administrative responsibilities of network administrators:

  • Back up application data
  • Replace the faulty server hardware
  • Manage physical server security
  • Update the server operating system
  • Manage permissions for shared documents

The company plans to migrate multiple servers to Azure virtual machines. You need to determine which administrative responsibilities will be eliminated after the planned migration. Which two responsibilities do you think should be eliminated? Each correct answer provides a complete solution.

23 – Answer

  • Manage physical server security
  • Replace the faulty server hardware

Azure virtual machines run on Hyper-V physical servers. Physical servers are owned and managed by Microsoft. As an Azure customer, you do not have access to the physical server. Microsoft manages the replacement of failed server hardware and the security of the physical server, so you don’t need to do this.

Incorrect answers:

  • Backing up Application Data: Microsoft has no control over the applications you run on your virtual machine. Therefore, it is your responsibility to ensure that application data is backed up.
  • Updating Server Operating Systems: Microsoft does not manage the operating system you are running on the virtual machine. Therefore, it is your responsibility to ensure that the operating system is updated.
  • Managing Permissions to Shared Documents: Microsoft does not control the shared folders that you host on the virtual machine. Therefore, it is your responsibility to ensure that folder permissions are configured correctly