AZ-500 Secure networking Practice Test 4 — 15 Questions

Question 1

A company has an Azure virtual network with two subnets: Frontend and Backend. They deploy a network virtual appliance (NVA) in a subnet named NVA_Subnet. They want to route all traffic from the Frontend subnet to the Backend subnet through the NVA for inspection. What is the minimum number of route tables required to achieve this traffic steering?

Accepted Answer

1. A single route table can be associated with the Frontend subnet and configured with a user-defined route (UDR) that has the NVA's private IP as the next hop for traffic destined to the Backend subnet. This ensures all traffic from Frontend to Backend is forwarded to the NVA for inspection. No additional route tables are needed because the NVA itself handles the routing decision after inspection, and the Backend subnet does not require a specific route to return traffic unless asymmetric routing is a concern.

Answer

2

Answer

3

Answer

4

Question 2

A company has multiple Azure virtual networks connected via VNet peering. They want to ensure that all traffic between the peered VNets is encrypted and that no traffic can bypass the encryption. Which configuration is required?

Accepted Answer

Use VPN Gateway with IPsec between VNets. VNet peering does not encrypt traffic between virtual networks by default. To enforce encryption for all traffic, you must use a VPN Gateway with IPsec/IKE policy configured between the peered VNets. This ensures that all traffic crossing the peering is encrypted and that no unencrypted path exists, meeting the requirement that no traffic can bypass encryption.

Answer

Enable Service Endpoint Policies

Answer

VNet peering does not support encryption; use Global VNet peering

Answer

Enable Azure Firewall

Question 3

A company has an Azure virtual network with a subnet that hosts a web application. The security team wants to allow inbound HTTPS traffic (port 443) from the internet to the web servers, but block all other inbound traffic. They have a network security group (NSG) associated with the subnet. What is the minimal set of inbound rules required?

Accepted Answer

A rule allowing HTTPS from Internet, and no other rules (default deny all inbound).. Network security groups (NSGs) in Azure have a default deny-all inbound rule (rule 65500) that is automatically applied to all inbound traffic. Therefore, you only need to add an explicit allow rule for HTTPS (port 443) from the Internet. No additional deny rule is required because the default rule already blocks all other inbound traffic.

Answer

A rule allowing HTTPS from Internet, and a default deny all rule.

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A rule allowing HTTPS from Internet, and a rule explicitly denying all other inbound traffic.

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A rule allowing HTTPS from any source, and a rule denying all other traffic with lower priority.

Question 4

A company has an Azure virtual network with multiple subnets hosting different tiers of an application. The security team requires inspection of all traffic between subnets for malicious patterns and the ability to allow or deny traffic based on fully qualified domain names (FQDNs). Which Azure networking service should they implement?

Accepted Answer

Azure Firewall. Azure Firewall is a managed, cloud-based network security service that provides full Layer 3–7 inspection and can filter traffic based on FQDNs in network and application rules. It can inspect all traffic between subnets in a virtual network (via forced tunneling or routing) and supports threat intelligence-based filtering for malicious patterns, making it the correct choice for this requirement.

Answer

Azure Network Security Group (NSG)

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Azure Application Gateway

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Azure VPN Gateway

Question 5

A company has an Azure virtual network with a single subnet that hosts web servers. The security team needs to allow inbound HTTPS traffic from the internet to the web servers, but block all other inbound traffic. They want to use a single Azure resource to accomplish this at the subnet level. Which resource should they configure?

Accepted Answer

Network Security Group (NSG). A Network Security Group (NSG) is the correct resource because it can be associated with a subnet to filter inbound traffic at Layer 3/4. By creating a rule that allows TCP port 443 (HTTPS) from the Internet service tag and a default deny-all rule, the NSG blocks all other inbound traffic while permitting HTTPS. This meets the requirement of a single Azure resource operating at the subnet level.

Answer

Azure Firewall

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Azure Front Door

Answer

Application Security Group (ASG)

Question 6

An organization has deployed Azure Firewall and wants to inspect all outbound traffic from a virtual network (VNet) to the internet. The VNet already contains subnets with workloads. What is the required networking configuration to force traffic through Azure Firewall?

Accepted Answer

Configure a route table with a default route (0.0.0.0/0) pointing to the Azure Firewall private IP and associate it with the subnets.. Option A is correct because Azure Firewall requires a route table with a default route (0.0.0.0/0) that has the Azure Firewall's private IP as the next hop, associated with each subnet whose traffic must be inspected. This forces all outbound traffic from those subnets to be routed through the firewall, enabling inspection and logging. Without this explicit route, traffic would use the default system route and bypass the firewall.

Answer

Add a Network Security Group (NSG) rule that allows all outbound traffic and associate it with the subnets.

Answer

Deploy an Application Gateway with Web Application Firewall (WAF) in front of the subnets.

Answer

Enable Azure DDoS Protection Standard on the VNet.

Question 7

Your company uses Azure Firewall to protect a virtual network. The security team needs to allow outbound HTTPS traffic from a specific subnet to a set of FQDNs, such as '*.contoso.com', while blocking all other outbound traffic. Which type of Azure Firewall rule should they configure?

Accepted Answer

An application rule with the 'Https' protocol and the target FQDNs set to '*.contoso.com'. Option B is correct because Azure Firewall application rules are specifically designed to allow outbound HTTP/HTTPS traffic based on fully qualified domain names (FQDNs). By configuring an application rule with protocol 'Https' and target FQDNs set to '*.contoso.com', the firewall inspects the TLS Server Name Indication (SNI) extension to match the requested domain, allowing traffic only to the specified FQDNs while blocking all other outbound traffic.

Answer

A network rule with destination port 443 and protocol TCP, and the destination IP address set to the resolved IPs of the FQDNs

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A NAT rule that translates the source IP to a public IP and allows traffic to any destination on port 443

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A DNAT rule that redirects outbound HTTPS traffic to an internal proxy server

Question 8

A company has a virtual network with a subnet hosting Azure VMs. They want to restrict all inbound traffic to only allow HTTPS (port 443) from the internet, but also allow SSH (port 22) only from a specific management IP address range (e.g., 203.0.113.0/24). Which Azure service should they use to achieve this filtering?

Accepted Answer

Network Security Group (NSG) rule. A Network Security Group (NSG) rule is the correct choice because NSGs provide stateful, granular inbound and outbound filtering at the subnet or NIC level. You can create a rule to allow HTTPS (TCP/443) from any source (Internet) and a separate rule to allow SSH (TCP/22) only from the specific management IP range 203.0.113.0/24, while implicitly denying all other inbound traffic. NSGs are the native Azure service for this type of traffic filtering and do not require additional cost or deployment.

Answer

Azure Firewall

Answer

Azure DDoS Protection

Answer

Azure Bastion

Question 9

You have an Azure virtual machine that hosts a web application. You need to allow inbound HTTP (80) and HTTPS (443) traffic from the internet to this VM only. You also need to allow outbound traffic to the internet from the VM. You want to use a managed Azure service with minimal configuration. What should you use?

Accepted Answer

Network Security Group (NSG). A Network Security Group (NSG) is the correct choice because it is a managed Azure service that provides a stateful, layer-3/4 firewall for filtering inbound and outbound traffic to a virtual machine. With minimal configuration, you can create inbound rules to allow HTTP (TCP/80) and HTTPS (TCP/443) from the internet (source 'Internet' or 'Any') and an outbound rule to allow all traffic to the internet (default outbound rule already allows this). NSGs are directly associated with a VM's subnet or network interface, making them the simplest managed solution for this scenario.

Answer

Azure Application Gateway

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Azure Firewall

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Azure Bastion

Question 10

A company has a virtual network in Azure with a subnet that hosts a web application. They want to allow inbound HTTPS traffic only from a specific source IP range (198.51.100.0/24). They are using Network Security Groups (NSGs) associated with the subnet. What is the minimal set of inbound security rules required?

Accepted Answer

One inbound rule: Allow TCP port 443 from source '198.51.100.0/24'. Option A is correct because NSGs have a default implicit 'DenyAllInbound' rule at the lowest priority (65500). Since you only need to allow HTTPS from the specific source IP range, a single inbound rule permitting TCP port 443 from source '198.51.100.0/24' is sufficient. The implicit deny will block all other traffic, including any traffic from other sources or ports, without needing an explicit deny rule.

Answer

Two inbound rules: one to allow HTTPS, and one to deny all other traffic

Answer

Three inbound rules: allow HTTPS, allow RDP for management, and deny all

Answer

One inbound rule: Allow TCP port 443 from source 'Any' and a separate rule to deny from '198.51.100.0/24'

Question 11

A company uses a hub-spoke network topology in Azure. They need to inspect and filter all traffic flowing between spoke virtual networks for security compliance. Which Azure-native service should be deployed in the hub virtual network to achieve this?

Accepted Answer

Azure Firewall. Azure Firewall is a fully managed, stateful firewall-as-a-service that can inspect and filter traffic between spoke virtual networks when deployed in the hub VNet. It supports application (FQDN) and network (IP/port/protocol) rules, and can enforce security compliance by logging and blocking non-compliant traffic. Unlike a Network Virtual Appliance (NVA), Azure Firewall is a native PaaS service with built-in high availability and auto-scaling, making it the recommended choice for hub-spoke traffic inspection.

Answer

Network Virtual Appliance (NVA)

Answer

Azure VPN Gateway

Answer

Azure Load Balancer

Question 12

A company has an Azure virtual network with multiple subnets. They want to centrally inspect and log all outbound traffic to the internet. They also need to allow or deny traffic based on domain names (FQDNs). Which Azure resource should they deploy?

Accepted Answer

Azure Firewall. Azure Firewall is a managed, cloud-native network security service that provides centralized outbound traffic inspection and logging. It supports application rules based on fully qualified domain names (FQDNs), enabling allow or deny decisions for outbound traffic to the internet using Layer 7 (application layer) filtering, which meets both requirements directly.

Answer

Network Virtual Appliance (NVA) from Azure Marketplace

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Azure Application Gateway with Web Application Firewall (WAF)

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Azure Network Security Groups (NSGs)

Question 13

A company has an Azure virtual network with subnets SubnetA and SubnetB. They deploy a network virtual appliance (NVA) in a subnet called NVA_Subnet. They want all traffic between SubnetA and SubnetB to be routed through the NVA for inspection. What is the minimum number of route tables and routes required?

Accepted Answer

Two route tables, each with a route to the other subnet via the NVA. Option B is correct because Azure route tables are associated with subnets, not the virtual network as a whole. To force traffic between SubnetA and SubnetB through the NVA, you need two separate route tables: one for SubnetA with a route to SubnetB's address space with the next hop set to the NVA's private IP, and one for SubnetB with a route to SubnetA's address space with the next hop set to the NVA's private IP. This ensures bidirectional traffic is inspected.

Answer

One route table with a route for each subnet via the NVA

Answer

No route tables needed; enable IP forwarding on the NVA

Answer

One route table with a single default route (0.0.0.0/0) via the NVA

Question 14

A company runs a public-facing web application on Azure App Service in the West US region. They want to protect against network-layer (Layer 3/4) DDoS attacks and have a single web application. Which Azure DDoS Protection tier should they use?

Accepted Answer

DDoS Protection Basic (default). DDoS Protection Basic is automatically enabled for all Azure resources at no additional cost, providing always-on traffic monitoring and real-time mitigation of common network-layer (Layer 3/4) attacks, such as SYN floods, UDP floods, and reflection attacks. Since the company has a single web application and only needs protection against Layer 3/4 DDoS attacks, the Basic tier is sufficient and requires no configuration or extra cost.

Answer

DDoS Protection Standard

Answer

Azure Web Application Firewall (WAF) on Application Gateway

Answer

Azure Front Door with DDoS Protection Standard

Question 15

A company has established a site-to-site VPN connection between its on-premises network and an Azure virtual network using an Azure VPN gateway. The security team wants to confirm that all traffic crossing the VPN tunnel is encrypted. Which protocol does the Azure VPN gateway use to encrypt the data?

Accepted Answer

IPSec (Internet Protocol Security). Azure VPN gateways use IPsec (Internet Protocol Security) in tunnel mode to encrypt all data traversing the site-to-site VPN tunnel. IPsec provides confidentiality, integrity, and authentication at the IP layer, ensuring that all traffic between the on-premises network and Azure virtual network is encrypted and secure.

Answer

SSL (Secure Sockets Layer) / TLS (Transport Layer Security)

Answer

SSH (Secure Shell)

Answer

PGP (Pretty Good Privacy)