MULTI CLOUD INTERVIEW QUESTIONS
Interview Questions
Network
- How to make communication from one Vnet to another Vnet?
Configure Vnet peering to make one vnet to another vnet communication
Virtual network peering enables you to connect two Azure virtual networks seamlessly. Once peered, the virtual networks appear as one, for connectivity purposes.
The traffic between virtual machines in the peered virtual networks is routed through the Microsoft backbone infrastructure, much like traffic is routed between virtual machines in the same virtual network, through private IP addresses only. Azure supports:
VNet peering – Connecting VNets within the same Azure region
Global VNet peering – Connecting VNets across Azure regions
- Can we move VNet to another region?
You can use an Azure Resource Manager template to complete the move of the virtual network to another region. You do this by exporting the virtual network to a template, modifying the parameters to match the destination region, and then deploying the template to the new region.
- What is Network Security Group
Network security group is to control inbound and outbound traffic or it allows or Deny the traffic coming to Virtual machine or Subnet level
NSG can be associated to Vmniclevel/ Subnetlevel or both
Traffic can be allowed or Deny on the based of rules in the NSG
- How many default rules in NSG
There are 3 inbound default rules and 3 outbound default rules and these cannot be deleted
How do you securely connect an on-premises network to Azure Virtual Network?
There are three ways to connect an on-premises network to Azure Virtual Network (VNet).
- Azure ExpressRoute– Azure ExpressRoute uses a private, dedicated, and high-bandwidth connection to extend on-premises network to Azure. This connection establishes using patners networks like [ Bsnl, Jio etc.,]
- Site-to-site VPN– Site-to-site VPN uses Azure VPN Gateway to connect to on-premises network’s VPN device having a public IP address, which can be Office network or Other Datacenbter
- Point-to-site VPN– Point-to-site VPN uses Azure VPN Gateway to connect from individual computers located on-premises like Work Home Machines
- What are the Load balancers
- Azure Load balancer
it is just like network load balancer. It equally distributes traffic to backend servers
==> it is a proxy based routing
==> it supports TCP/UDP protocol
==> it works on OSI layer 4
- Application gateway
==> it works as URL/Path based routing
==> it works on OSI layer 7
==> it supports multiple backend pool
==> it supports WAF
==> it has more application awareness
- Global Load balancer ( it works between the regions
- a)Traffic Manager == It works on DNS based principles and it can be configured using routing methods
- èPriority
- Weightage
- Performance
- geographical
- multivalue
- subnet
b)Azure front door èit works as URL-based and Path-based routing
- It has more application awareness
- It supports WAF (web application firewall )
- It automatically redirects from HTTP to HTTPS
- It is more intelligent
- It supports CDN
7. What is the difference between Private and Public load balancers?
Azure load balancers can be Public load balancers or Private load balancers.
- Public load balancers – An public load balancer permits traffic from the internet and distributes the load across multiple virtual machines.
- Private load balancers – A public load balancer takes in requests from an internal Azure resource and distributes the load to other Azure internal resources.
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