In a distributed deployment scenario, ASP.NET Core Identity uses a distributed lock mechanism to ensure that only one instance applies migrations at a time. This prevents conflicts and ensures database consistency. Allowing multiple instances to apply migrations concurrently could lead to issues such as data corruption or race conditions. While database transactions are used for consistency, they may not be sufficient for distributed deployments. ASP.NET Core Identity is designed to support distributed scenarios.

The Update-Database command, when used with Identity migrations, applies any pending migrations to update the database schema to match the current state of your Identity models. This ensures that the database structure aligns with your Identity-related code changes.

ASP.NET Core includes a built-in dependency injection (DI) container for managing application dependencies. This feature helps achieve loose coupling, maintainability, and testability in your code by allowing you to inject dependencies into classes rather than hard-coding them.

The primary purpose of the _ViewImports.cshtml file is to import namespaces that you want to use across multiple Razor views. This allows you to bring in commonly used classes, extension methods, or helpers without adding individual 'using' directives to each view, promoting maintainability and reducing redundancy.

To send data to an action method via an HTTP GET request in Razor forms, you can set the method attribute on the form tag to "GET." This tells the browser to include the form data in the URL as query parameters, allowing you to use [HttpGet] attribute on the action method to receive the data.

The @ symbol in a Razor view is used to denote the beginning of server-side script. This script can include C# code that generates dynamic content within the HTML markup, making Razor views a powerful tool for building dynamic web pages in ASP.NET Core.

Tag Helpers are processed in the order determined by the Order property. By setting the Order property, you can control the sequence in which multiple tag helpers are applied to an HTML element. This is crucial for scenarios where you need precise control over tag helper execution.

Azure Kubernetes Service (AKS) is tailored for deploying Docker containers. It's a managed Kubernetes container orchestration service that simplifies deploying, managing, and scaling containerized applications using Kubernetes.

To restrict certain parts of your application to specific subdomains using attribute routing, you can utilize Route Constraints. By defining constraints on route parameters like {subdomain}, you can ensure that certain routes are accessible only when the subdomain matches the required value, fulfilling the client's requirement for subdomain-based access control.

In an ASP.NET Core MVC application, the configuration for routes is primarily done in the Startup.cs file. In the Configure method, developers define route patterns and specify which controller and action should handle incoming requests, enabling the routing system to map URLs to controller actions.

To serve static files in ASP.NET Core, you need to configure the necessary middleware in the "Startup.cs" file. Middleware is a key concept in ASP.NET Core for handling requests and responses.

As a beginner, for a comprehensive ASP.NET Core development experience, you would typically start with Microsoft's Visual Studio. Visual Studio provides a rich and integrated development environment specifically tailored for ASP.NET Core development, making it an excellent choice for newcomers.