Public IP addresses in Azure - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a Public IP address in Azure?

A Public IP address in Azure is an address that allows resources to communicate with the internet or other external networks. It is assigned to Azure resources like virtual machines or load balancers to enable inbound and outbound internet connectivity.

beginner

What are the two types of Public IP addresses in Azure?

Azure offers two types of Public IP addresses: Dynamic and Static. Dynamic IP addresses can change when the resource is stopped and started again, while Static IP addresses remain fixed for the lifetime of the resource.

intermediate

Why would you choose a Static Public IP address over a Dynamic one?

You choose a Static Public IP address when you need a fixed IP that does not change, such as for DNS records, firewall rules, or when clients need to reliably connect to your resource.

beginner

How does Azure assign a Dynamic Public IP address?

Azure assigns a Dynamic Public IP address from a pool of available addresses when the resource is started. This IP can change if the resource is stopped and started again.

intermediate

Can a Public IP address be associated with multiple Azure resources at the same time?

No, a Public IP address in Azure can only be associated with one resource at a time, such as a virtual machine, load balancer, or application gateway.

Which type of Public IP address in Azure remains the same even after restarting the resource?

A Static

B Dynamic

C Temporary

D Ephemeral

Static Public IP addresses remain fixed and do not change when the resource restarts.

What is the main purpose of assigning a Public IP address to an Azure virtual machine?

A To secure the VM from all traffic

B To increase the VM's CPU power

C To allow the VM to communicate with the internet

D To store data persistently

A Public IP address allows the VM to send and receive traffic from the internet.

If you stop and start a VM with a Dynamic Public IP, what happens to the IP address?

A It is deleted permanently

B It stays the same

C It becomes static automatically

D It may change

Dynamic Public IP addresses can change when the resource is stopped and started.

Can you assign the same Public IP address to two different Azure resources at the same time?

A No

B Yes, always

C Only if they are in different regions

D Only for load balancers

A Public IP address can only be associated with one resource at a time.

Which Azure service commonly uses Public IP addresses to distribute traffic?

A Azure Blob Storage

B Load Balancer

C Azure Functions

D Azure SQL Database

Azure Load Balancers use Public IP addresses to distribute incoming traffic to backend resources.

Explain what a Public IP address is in Azure and why it is important.

Think about how devices connect to the internet.

Describe the difference between Static and Dynamic Public IP addresses in Azure and when to use each.

Consider reliability and scenarios needing fixed addresses.