What is connectivity between 2 VMs

Question

What is it called to connect 2 VMs in azure which are either in same or different region. And I want to know how it works in azure.

Answer 1

Hi Richard,
The specific terminology for establishing connection between a VM in one region and the other VM in same or another region is called Virtual network peering.

For more information refer to the link provided
https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-peering-overview
Feel free to reach out for further queries.
Hope the answer is useful, If the answer is helpful please "Accept answer" and "Upvote"

Answer 2

In Azure, connecting two Virtual Machines (VMs) can be done using different networking options depending on whether they are in the same region or different regions.

1. Connecting VMs in the Same Region Method: Virtual Network (VNet) Peering

• What it is:
  • VNet Peering connects two Azure Virtual Networks (VNets) within the same region.
  • It allows low-latency, high-bandwidth communication between VMs in different VNets.
  • The traffic stays inside the Azure backbone, ensuring security and speed.
• How it works:
  • Both VMs must be in separate VNets.
  • You create a VNet Peering between the two VNets.
  • The VMs can then communicate using their private IP addresses.
  • No VPN or public IP is required.

2. Connecting VMs in Different Regions Method: Global VNet Peering

• What it is:
  • This is the same as VNet Peering but between VNets in different Azure regions.
  • Still provides a low-latency and secure connection.
  • Traffic remains within Microsoft’s private backbone (not over the public internet).
• How it works:
  • You create a Global VNet Peering between VNets in different regions.
  • The VMs can communicate using their private IPs.
  • No need for VPN or Public IPs.

Alternative: VPN Gateway

• If VNet Peering is not possible (e.g., compliance reasons), you can use VPN Gateway (encrypted over the internet).

Comparison: VNet Peering vs VPN Gateway

Feature	VNet Peering	Global VNet Peering	VPN Gateway
Latency	Very Low	Low	Higher
Bandwidth	High	High	Limited (based on SKU)
Security	Private	Private	Encrypted
Cost	Lower	Higher (egress cost)	Higher
Use Case	Same region	Cross-region	Hybrid cloud

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hth

Marcin

Answer 3

Thank you both for the answer as it has been a while since I last used Microsoft and forgot the names of features and hence this problem and I am trying to accept both answers but not able to.