Database
Database as a Service (DBaaS) includes SQL and NoSQL tools in this category. Databases such as Azure Cosmos DB and Azure Database for PostgreSQL are also included. It consists of the following elements:

SQL Database: A relational database service in the Microsoft cloud that is built on the market-leading Microsoft SQL Server engine.
DocumentDB is a fully managed NoSQL database service designed for fast and predictable performance as well as ease of development.
Redis Cache is a safe and sophisticated key-value store. It stores data structures such as strings, hashes, lists, and so on.

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Content Distribution Network
The Content Delivery Network (CDN) stores static web content in strategic locations. This allows you to provide users with faster content delivery. It consists of the following elements:

VPN Gateway sends encrypted traffic over a public connection.
Traffic Manager: It allows you to control and distribute user traffic for services such as WebApps, VMs, Azure, and cloud services across multiple datacenters.
Express Route: Allows you to extend your on-premises networks into the Microsoft cloud by connecting to Microsoft Azure, Office 365, and CRM Online via a dedicated private connection.