fix(interlink): add faq

Author: RoRoJ

faq/interlink.mdx

@@ -23,6 +23,18 @@ Currently, InterLink is available in **hosted** version only. This means that yo
 
 For more information on how InterLink works, see our [detailed overview](/network/ipam/reference-content/overview/).
 
-## What partners are available to provision my InterLink?
+## What is the difference between a V C-Private Network, a site-to-site VPN and a Scaleway InterLink?
 
-TODO ADD MORE QUESTIONS.
+VPC is a logically isolated private network within a Scaleway infrastructure where you can deploy resources, such as Instances, Managed Databases or Kubernetes Kapsule, away from the public internet.
+
+Site-to-site VPN allows secure communication between your on-premises network and your cloud-based VPC over the public internet.
+
+Scaleway InterLink provides a hosted, private, and high-performance connection between your on-premises network and your VPC (physically hosted in a Scaleway data center).
+
+## Does Scaleway InterLink support MPLS and L2 interconnections?
+
+No, so far Scaleway InterLink only supports layer 3 interconnections in BGP mode.
+
+## Which partners are available to host my InterLink?
+
+You can see the full range of available partners in the Scaleway [console](https://console.scaleway.com/) when you create an InterLink, or via the [API](https://www.scaleway.com/en/developers/api/interlink/#path-partners-list-available-partners). If you're looking for a partner that isn't available, [get in touch](https://www.scaleway.com/en/contact-sales/) to let us know.