Private Link for secure service access in Azure - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding Azure Private Link Basics

Which statement best describes the primary purpose of Azure Private Link?

A It enables private connectivity from a virtual network to Azure services without exposing traffic to the public internet.

B It provides a VPN tunnel between on-premises networks and Azure virtual networks.

C It allows secure access to Azure services over the public internet using encryption.

D It is a firewall service that blocks all inbound traffic to Azure resources.

💡 Hint

Think about how Private Link keeps traffic off the public internet.

Azure Private Link provides private connectivity from a virtual network to Azure services, ensuring traffic does not traverse the public internet, enhancing security.

❓ Architecture

intermediate

Designing Secure Access with Private Link

You want to securely connect your Azure virtual network to an Azure Storage account using Private Link. Which component must you create in your virtual network to enable this connection?

A A Virtual Network Gateway

B A Private Endpoint

C A Network Security Group

D An Application Gateway

💡 Hint

Consider the resource that represents the private connection inside your virtual network.

A Private Endpoint is a network interface that connects you privately and securely to a service powered by Azure Private Link within your virtual network.

❓ security

advanced

Private Link Security Behavior

When using Azure Private Link, what happens to the DNS resolution of the service's public endpoint inside your virtual network?

A DNS resolves to the private IP address of the Private Endpoint within your virtual network.

B DNS resolves to a random IP address to prevent traffic routing.

C DNS resolution is disabled for the service inside the virtual network.

D DNS resolves to the public IP address of the service, routing traffic over the internet.

💡 Hint

Think about how Private Link keeps traffic inside your network.

With Private Link, DNS resolution for the service's public endpoint is overridden to resolve to the private IP address of the Private Endpoint, ensuring traffic stays within the virtual network.

❓ service_behavior

advanced

Impact of Private Link on Service Access

You have configured a Private Endpoint for an Azure SQL Database. What is the expected behavior when a client inside your virtual network tries to connect to the SQL Database using its fully qualified domain name (FQDN)?

A The client connects over the internet using the public IP of the SQL Database.

B The client connection is blocked because Private Link disables all access.

C The client connects privately through the Private Endpoint's IP address inside the virtual network.

D The client must use the IP address directly; FQDN is not supported.

💡 Hint

Consider how Private Link changes the network path for service access.

When a Private Endpoint is configured, DNS resolves the service FQDN to the Private Endpoint's private IP, so clients connect privately within the virtual network.

✅ Best Practice

expert

Best Practice for Securing Azure Services with Private Link

You want to ensure that all access to your Azure Key Vault is only through Private Link and no public network access is allowed. Which configuration achieves this?

A Configure the Key Vault to allow access from all networks but monitor traffic logs.

B Create a VPN to the Key Vault and leave public access enabled.

C Use a Network Security Group to block all inbound traffic to the Key Vault.

D Enable Private Endpoint and disable public network access on the Key Vault firewall settings.

💡 Hint

Think about how to restrict access to only private connections.

Enabling a Private Endpoint and disabling public network access on the Key Vault ensures all traffic flows through Private Link, blocking any public internet access.