Question
Your company has an on-premises network and three Azure subscriptions named Subscription1, Subscription2, and Subscription3.
The departments at the company use the Azure subscriptions as shown in the following table.
| Department | Subscription |
|---|---|
| IT | Subscription1 |
| Research | Subscription1 |
| Development | Subscription2 |
| Testing | Subscription2 |
| Distribution | Subscription3 |
All the resources in the subscriptions are in either the West US Azure region or the West US 2 Azure region.
You plan to connect all the subscriptions to the on-premises network by using ExpressRoute.
What is the minimum number of ExpressRoute circuits required?
- A. 1 Correct
- B. 2
- C. 3
- D. 4
- E. 5
Explanation
A single ExpressRoute circuit can link virtual networks in the same subscription as the circuit or in other subscriptions, using authorizations. A Standard circuit reaches every Azure region in its geopolitical area, so West US and West US 2 are both covered. One circuit is therefore enough for all three subscriptions, as long as the number of linked virtual networks stays within the circuit's limit (10 on Standard).
