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FALSE. AZURE does not SUPPORT this.

NSG stands for Network Security Group that has a LIST of ACL (Access CONTROL List) rules which either allows/denies network traffic to subnets or NICs (Network Interface Card) connected to a subnet or both. When NSG is LINKED with a subnet, then the ACL rules are applied to all the Virtual Machines in that subnet. 

Restrictions of traffic to INDIVIDUAL NIC can be done by associating NSG directly to that NIC.

AZURE Resource Manager is a service provided by Azure to provide management and application deployment in Azure.

The resource manager provides the management layer that helps the developer to CREATE, modify or delete the resources in the Azure subscription ACCOUNT. This FEATURE comes in handy when we have requirements like managing access controls, locks, ensuring the security of the resources post-deployment, and organization of those resources.

• The Azure SLA is a CONTRACT that ensures or GUARANTEES that when TWO or more role instances of a role are deployed on Azure, access to that cloud service is guaranteed for at least 99.95% of the time.
• It also states that if the role instance process is not in the RUNNING state, then the detection of such processes and corrective action for the same will be taken 99.9% percent of the time.
• If the mentioned guarantees are not satisfied at any point in time, then Azure credits a percentage of monthly fees to US depending on the pricing model of the respective Azure services.

• Azure Diagnostics API helps US collect diagnostic data such as PERFORMANCE MONITORING, system event logs, etc from the applications that are running on Azure.
• For the verbose monitoring of the data, Azure Diagnostics has to be enabled for the cloud service roles.
• The diagnostics data can be used for building visual chart representations for better monitoring and also for creating performance METRIC alerts.

CLOUD service roles comprise a set of application and configuration FILES. There are 2 kinds of roles provided by Azure:

• Web role: This provides a dedicated web server belonging to IIS (Internet INFORMATION Services) that is used for automatic deployment and hosting of front-end websites.
• Worker role: These roles HELP the applications hosted WITHIN them to run asynchronously for longer durations and are independent of the user interactions and generally do not use IIS. They are also ideal for performing background processes. The applications are run in a standalone manner.

A role instance is NOTHING but a virtual MACHINE where the APPLICATION CODE runs with the help of running role configurations. There can also be multiple instances of a role as per the definition in the cloud service configuration FILES.

There are 3 MODELS AVAILABLE for cloud deployment:

• Public Cloud: In this model, the cloud infrastructure is owned publicly by the cloud provider and there are chances that the server resources COULD be shared between multiple applications.
• Private Cloud: Here, the cloud infrastructure is owned exclusively by US or exclusive service is provided by the cloud provider to us.
  • This includes hosting our applications on our own on-premise servers or hosting the application on a dedicated server provided by the cloud provider.
• Hybrid Cloud: As the name itself says, this model is the hybrid combination of private cloud and the public cloud.
  • This might include the scenario of using on-premise servers for processing confidential, sensitive data and using public cloud features for hosting public-facing applications.

Here, we USE the best of both worlds to our requirements and advantage.

• Azure Cloud SERVICE is a classic example of a platform as a service (PaaS). This was designed to support those applications which DEMAND high scalability, reliability, and availability all within the constraints of REDUCED cost of operations. These are hosted on virtual VMs and Azure provides more control over them by letting the DEVELOPERS install the NECESSARY software and enabling them to control remotely.
• Azure cloud services are used for deploying multi-tier web-based applications in Azure by means of creating an instance of cloud service. It is also possible to define multiple roles such as web roles, worker roles, etc for the purpose of distributed processing. Azure cloud services help in the easier and flexible scalability of the application.
• Each role of the cloud service has its own purpose and thereby its own configuration and application files.

• Cloud computing refers to the usage of computing RESOURCES (servers) on the internet (refers to the term cloud) for the purpose of storing, managing, analyzing, and processing the data. Here, instead of maintaining our own servers, we use the infrastructure PROVIDED and maintained by third-party vendors such as Microsoft, AWS, etc, and pay them based on the server usage time duration.
• Cloud computing enhances the speed of execution, ensures flexibility of resources, and easier scalability.
• Cloud computing can be used to attain HIGH fault tolerance and high system availability and this can also be done dynamically as per the infrastructural requirements of the application.