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mediummultiple choiceObjective-mapped

A company deploys Azure Firewall in a hub VNet to inspect all outbound traffic from a spoke VNet. They enable VNet peering between the hub and spoke. They create a route table with a default route (0.0.0.0/0) pointing to the firewall's private IP as the next hop, and associate it with the spoke subnets. However, outbound traffic from the spoke subnets is still going directly to the internet, bypassing the firewall. What is the most likely cause?

Question 1mediummultiple choice
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A company deploys Azure Firewall in a hub VNet to inspect all outbound traffic from a spoke VNet. They enable VNet peering between the hub and spoke. They create a route table with a default route (0.0.0.0/0) pointing to the firewall's private IP as the next hop, and associate it with the spoke subnets. However, outbound traffic from the spoke subnets is still going directly to the internet, bypassing the firewall. What is the most likely cause?

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Answer choices

Why each option matters

Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.

A

Best answer

The route table's next hop type is not set to 'Virtual appliance'

For user-defined routes that point to a virtual appliance like Azure Firewall, the next hop type must be 'Virtual appliance'. Setting it to 'Internet' or any other type causes traffic to bypass the firewall.

B

Distractor review

The route table is not associated with the subnet

The question states the route table is created and associated, so this is unlikely unless misstated.

C

Distractor review

The hub-spoke peering is not configured correctly

VNet peering is required for connectivity, but if peering is misconfigured, traffic would not flow at all, not bypass the firewall.

D

Distractor review

Azure Firewall is in a different resource group

Resource group location does not affect routing; firewalls can be in any resource group.

Common exam trap

Common exam trap: usable hosts are not the same as total addresses

Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.

Technical deep dive

How to think about this question

Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.

KKey Concepts to Remember

  • CIDR notation defines the prefix length.
  • Block size helps identify subnet boundaries.
  • Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
  • The required host count determines the smallest suitable subnet.

TExam Day Tips

  • Write the block size before choosing the subnet.
  • Check whether the question asks for hosts, subnets or a specific address range.
  • Do not confuse /24, /25, /26 and /27 host counts.

Related practice questions

Related AZ-500 practice-question pages

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More questions from this exam

Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.

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FAQ

Questions learners often ask

What does this AZ-500 question test?

CIDR notation defines the prefix length.

What is the correct answer to this question?

The correct answer is: The route table's next hop type is not set to 'Virtual appliance' — When you associate a route table with a subnet, the effective routes are the combination of system routes and user-defined routes. If the firewall's private IP is specified as the next hop for 0.0.0.0/0, but the firewall itself is not deployed with 'Forced Tunneling' or the route table is not properly propagated, the issue is often that the route table does not have 'Propagate gateway routes' set to 'No'. However, the most common cause is that the next hop type is not set to 'Virtual appliance'. In Azure, for user-defined routes, the next hop type for a virtual appliance must be 'Virtual appliance' and the IP address must be the private IP. If they set next hop type to 'Internet', traffic will go directly to internet. So option mentioning misconfigured next hop type is correct.

What should I do if I get this AZ-500 question wrong?

Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.

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