ExpressRoute for dedicated connections in Azure - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding ExpressRoute Circuit Bandwidth

You have an ExpressRoute circuit with a bandwidth of 1 Gbps. What happens if your on-premises network tries to send 2 Gbps of data through this circuit?

A The circuit will automatically increase bandwidth to 2 Gbps to handle the traffic.

B Azure will queue the extra traffic and deliver it later without any loss.

C The circuit will split the traffic and send half through ExpressRoute and half through the public internet.

D Traffic above 1 Gbps will be dropped or delayed because the circuit bandwidth is limited to 1 Gbps.

💡 Hint

Think about the fixed capacity of a dedicated connection.

ExpressRoute circuits have fixed bandwidth limits. Traffic exceeding this limit can be dropped or delayed because the circuit cannot carry more than its provisioned bandwidth.

❓ Architecture

intermediate

Choosing the Right ExpressRoute Peering Type

You want to connect your on-premises network to Azure services like Azure Storage and Azure SQL Database using ExpressRoute. Which peering type should you configure?

A Private peering only

B Microsoft peering only

C Public peering only

D Both private and Microsoft peering

💡 Hint

Consider which peering type connects to Azure public services.

Microsoft peering is used to connect to Azure public services like Azure Storage and Azure SQL Database over ExpressRoute.

❓ security

advanced

Securing Data on ExpressRoute Connections

Which of the following is the best practice to ensure data confidentiality when using ExpressRoute for dedicated connections?

A Encrypt data at the application layer before sending it over ExpressRoute.

B Use ExpressRoute with public peering to benefit from Azure's built-in encryption.

C Use IPsec VPN tunnels over ExpressRoute to encrypt data in transit.

D Rely solely on the private nature of ExpressRoute circuits without additional encryption.

💡 Hint

Think about layers of security beyond the network.

ExpressRoute provides a private connection but does not encrypt data by default. Encrypting data at the application layer ensures confidentiality even if the network is compromised.

❓ service_behavior

advanced

ExpressRoute Circuit Status Behavior

You have created an ExpressRoute circuit but it shows a status of 'Provisioning' for several hours. What is the most likely reason?

A The circuit requires approval and provisioning by the connectivity provider before it becomes active.

B The circuit is active and ready to use immediately after creation.

C The circuit is in error state and needs to be deleted and recreated.

D The circuit is waiting for you to configure BGP sessions before it becomes active.

💡 Hint

Think about the role of the connectivity provider in ExpressRoute setup.

After creating an ExpressRoute circuit, the connectivity provider must provision and activate the circuit before it becomes usable.

✅ Best Practice

expert

Designing High Availability with ExpressRoute

You want to design a highly available network connection between your on-premises data center and Azure using ExpressRoute. Which design approach follows best practices?

A Use a single ExpressRoute circuit with one peering to reduce complexity.

B Use ExpressRoute with public peering only and rely on Azure redundancy.

C Use two ExpressRoute circuits from different providers or locations with BGP failover configured.

D Use VPN over the internet as a backup to a single ExpressRoute circuit without BGP.

💡 Hint

Consider redundancy and failover in network design.

High availability requires multiple ExpressRoute circuits from different providers or locations with BGP failover to ensure continuous connectivity.