A company is currently planning on setting up Jenkins on an Azure virtual machine. Code will be build using the Jenkins server and then deployed to a Kubernetes cluster in Azure. The code will be picked up from the Azure container registry. 
Which of the following needs to be implemented to ensure traffic can flow into the Jenkins instance on the Azure virtual machine

Answer options:

A.Open the port 8080 on the server
B.Add a subnet to the network
C.Add an additional network interface to the virtual machine
D.Implement virtual network peering

Answer – A 
You need to ensure port 8080 is open on the virtual machine. This is mentioned in the Microsoft documentation 

Since this is clearly mentioned, all other options are incorrect 
For more information on using Jenkins on Azure, please visit the below URL 

https://docs.microsoft.com/en-us/azure/aks/jenkins-continuous-deployment