View Full Amazon AWS Certified Advanced Networking – Specialty ANS-C01 Exam Dumps and Practice Test Dumps

 

Question 241. Which AWS Transit Gateway feature allows routes learned from one attachment to be made available in a Transit Gateway route table?

1. Route propagation
2. Route 53 forwarding
3. VPC endpoint policy
4. DNS delegation

Correct Answer: 1. Route propagation

Explanation:

Transit Gateway route propagation allows routes from supported attachments to be automatically inserted into a Transit Gateway route table. This reduces the need to manually create every route when using dynamic routing architectures. For example, routes learned through a VPN or Direct Connect-based attachment can be propagated into a selected Transit Gateway route table. Administrators can control which route tables receive propagated routes, which is useful for implementing segmentation and limiting connectivity between network domains. Route propagation should be distinguished from route-table association: association determines which Transit Gateway route table an attachment uses for forwarding decisions, while propagation determines which routes are learned and installed in a route table.

Question 242. What is the primary purpose of associating a Transit Gateway attachment with a specific Transit Gateway route table?

1. To assign an IP address to the attachment
2. To determine which route table is used for traffic forwarding from that attachment
3. To encrypt all traffic automatically
4. To create a DNS hosted zone

Correct Answer: 2. To determine which route table is used for traffic forwarding from that attachment

Explanation:

A Transit Gateway attachment can be associated with a Transit Gateway route table, and that association determines which routing table is used when traffic enters the Transit Gateway from that attachment. This provides an important mechanism for controlling network segmentation. For example, production VPCs can be associated with a route table containing only approved shared-service and inspection routes, while development VPCs can use a different route table. Association and propagation work together but have different functions. Propagation controls which routes are learned into a route table, while association controls which route table an attachment uses when forwarding traffic through the Transit Gateway.

Question 243. Which AWS Transit Gateway capability can connect Transit Gateways in different AWS Regions?

1. Transit Gateway peering
2. VPC gateway endpoint
3. Internet Gateway
4. Route 53 Resolver endpoint

Correct Answer: 1. Transit Gateway peering

Explanation:

Transit Gateway peering allows Transit Gateways in different AWS Regions to exchange traffic across a peering connection. This can provide centralized connectivity between networks attached to separate regional Transit Gateways without requiring every VPC to establish individual inter-Region connections. Appropriate routes must be configured in the Transit Gateway route tables so that traffic destined for the remote Region is sent through the peering attachment. Transit Gateway peering can therefore support large multi-Region network architectures while maintaining regional routing boundaries. It is different from VPC peering, which directly connects two VPCs, while Transit Gateway peering connects two Transit Gateway routing hubs.

Question 244. An organization has hundreds of VPCs and wants to centralize connectivity to on-premises networks. Which design can reduce the number of individual connections that must be maintained?

1. Create a separate VPN for every VPC
2. Use Transit Gateway with centralized VPN or Direct Connect connectivity
3. Create a full mesh of VPC peering connections
4. Assign public IP addresses to every instance

Correct Answer: 2. Use Transit Gateway with centralized VPN or Direct Connect connectivity

Explanation:

A centralized Transit Gateway architecture can significantly reduce connectivity complexity in environments containing many VPCs. Instead of establishing individual VPN or other hybrid connections for every VPC, organizations can attach VPCs to a Transit Gateway and connect the hybrid network through supported centralized connectivity such as VPN or Direct Connect. Transit Gateway route tables then control how traffic moves between the VPCs and external networks. This hub-and-spoke approach is easier to scale and can also support segmentation, centralized inspection, and shared services. A full mesh of VPC peering connections becomes increasingly difficult to manage as the number of VPCs grows.

Question 245. Which Transit Gateway feature can help ensure that traffic entering a centralized inspection VPC returns through the same network function path when required by stateful appliances?

1. Appliance mode support
2. Route 53 geolocation routing
3. CloudFront cache behavior
4. Public VIF

Correct Answer: 1. Appliance mode support

Explanation:

Transit Gateway appliance mode can help maintain symmetric traffic flows through a centralized inspection VPC when stateful network appliances require both directions of a connection to traverse the same appliance or inspection path. Stateful firewalls can have problems when traffic for one connection enters through one appliance and the return traffic uses a different appliance that does not share session state. Appliance mode is designed to help with these traffic-flow requirements in architectures involving centralized network functions. Proper routing remains necessary, and the feature should be evaluated together with the design of the inspection VPC, appliance fleet, and Transit Gateway attachments to achieve predictable stateful inspection behavior.

Question 246. Which AWS service can connect an on-premises network to AWS using a dedicated network connection instead of an encrypted tunnel over the public internet?

1. AWS Direct Connect
2. AWS Site-to-Site VPN
3. AWS PrivateLink
4. Amazon CloudFront

Correct Answer: 1. AWS Direct Connect

Explanation:

AWS Direct Connect provides dedicated network connectivity between a customer environment and AWS through a Direct Connect location. Unlike Site-to-Site VPN, which creates encrypted IPsec tunnels over an underlying network such as the public internet, Direct Connect uses dedicated connectivity provided through the Direct Connect infrastructure and associated connectivity models. Direct Connect can offer more predictable network performance and is often used for high-volume or latency-sensitive hybrid workloads. Organizations can create redundant Direct Connect connections and combine them with VPN connectivity for resilience. Encryption requirements should be evaluated separately because Direct Connect connectivity and encryption are distinct architectural considerations.

Question 247. Which Direct Connect design provides greater resiliency by using connections associated with separate physical locations or failure domains?

1. Two connections in the same device only
2. Redundant connections across independent Direct Connect locations or failure domains
3. One connection with a larger CIDR
4. One public VIF

Correct Answer: 2. Redundant connections across independent Direct Connect locations or failure domains

Explanation:

Resilient Direct Connect architectures should consider more than simply having two logical connections. If both connections depend on the same physical facility, device, or connectivity provider failure domain, a single infrastructure failure could affect both paths. Using independent Direct Connect locations or appropriately separated failure domains can reduce the chance that one physical incident disrupts all hybrid connectivity. AWS provides several resilience-oriented Direct Connect models to help organizations evaluate redundancy requirements. Network architects should also consider redundant customer equipment, diverse paths, and backup VPN connectivity where appropriate. The goal is to eliminate single points of failure throughout the complete connectivity chain rather than only duplicating one component.

Question 248. Which Site-to-Site VPN routing method requires the administrator to manually specify the destination prefixes that should use the VPN connection?

1. Dynamic routing
2. Static routing
3. BGP route propagation
4. DNS routing

Correct Answer: 2. Static routing

Explanation:

Static routing requires network administrators to manually configure the destination network prefixes that should be routed through the Site-to-Site VPN connection. This approach can be suitable for smaller environments with a limited and relatively stable number of networks. However, as the network grows or prefixes change frequently, static routing can require additional operational effort because route changes must be maintained manually. Dynamic routing using BGP provides automatic route exchange and can make larger hybrid environments easier to manage. When choosing between static and dynamic routing, administrators should consider network size, redundancy requirements, route-change frequency, and the capabilities of the customer gateway device.

Question 249. Which protocol is used by AWS Site-to-Site VPN to establish encrypted tunnels between the customer gateway and AWS?

1. HTTP
2. IPsec
3. FTP
4. DNS

Correct Answer: 2. IPsec

Explanation:

AWS Site-to-Site VPN uses IPsec to establish encrypted tunnels between the customer gateway and AWS VPN infrastructure. IPsec provides security mechanisms that protect network traffic as it travels across the underlying network. The VPN architecture can use multiple tunnels for resilience, and routing can be configured statically or dynamically depending on the deployment. IPsec operates at the network layer and is fundamentally different from application protocols such as HTTP or FTP. When troubleshooting a VPN, administrators should consider tunnel status, customer gateway configuration, routing, security settings, and the negotiation parameters required for successful IPsec establishment.

Question 250. Which AWS service provides remote users with client-based VPN access to resources in AWS VPCs?

1. AWS Client VPN
2. AWS Direct Connect
3. Amazon CloudFront
4. AWS Global Accelerator

Correct Answer: 1. AWS Client VPN

Explanation:

AWS Client VPN is a managed client-based VPN service that allows individual users to securely connect to AWS and access authorized resources. It is particularly useful for remote employees, administrators, contractors, and other users who need private access to applications or VPC resources from their devices. Client VPN uses secure VPN connections and can integrate with authentication mechanisms such as Active Directory and certificate-based authentication, depending on the configuration. It differs from Site-to-Site VPN, which is primarily designed to connect entire networks or customer gateway devices to AWS. Client VPN therefore addresses remote-user connectivity rather than permanent site-to-site network connectivity.

Question 251. Which AWS networking feature can provide private connectivity from an on-premises network to an AWS VPC without requiring a public IP address on the VPC resources?

1. Direct Connect private VIF
2. CloudFront distribution
3. Public VIF
4. Internet Gateway

Correct Answer: 1. Direct Connect private VIF

Explanation:

A Direct Connect private virtual interface provides private connectivity between an on-premises network and AWS VPC resources through Direct Connect. Workloads do not need public IP addresses simply to communicate with the customer network through this private connectivity path. BGP is used to exchange routing information, allowing the customer network and AWS to learn the required prefixes. This architecture is useful for hybrid applications where databases, application servers, or internal services need direct private communication with on-premises systems. It differs from a public VIF, which is designed for AWS public services, and from internet-based connectivity, which introduces a different routing and security model.

Question 252. Which VPC endpoint architecture uses private IP addresses assigned to elastic network interfaces in selected subnets?

1. Gateway endpoint
2. Interface endpoint
3. Internet Gateway
4. Egress-only Internet Gateway

Correct Answer: 2. Interface endpoint

Explanation:

An interface VPC endpoint creates elastic network interfaces in selected subnets and assigns them private IP addresses. Applications can communicate with supported AWS services or endpoint services through these private addresses without requiring public internet connectivity. Security groups can be associated with the endpoint network interfaces to control permitted traffic. Private DNS can also be enabled so that standard service names resolve to the private endpoint addresses when supported. Gateway endpoints use a different architecture based on route-table entries and are commonly used for S3 and DynamoDB. Understanding this distinction is important because interface endpoints have different networking, security, and cost considerations.

Question 253. Which VPC endpoint type is associated with route-table entries rather than elastic network interfaces?

1. Interface endpoint
2. Gateway endpoint
3. Client VPN endpoint
4. Transit Gateway endpoint

Correct Answer: 2. Gateway endpoint

Explanation:

A gateway VPC endpoint provides private connectivity to supported AWS services by using route-table entries. Instead of creating endpoint network interfaces inside each selected subnet, the gateway endpoint becomes the target for routes associated with supported service destinations. This architecture is commonly used for Amazon S3 and DynamoDB. It allows workloads in private subnets to access those services without requiring NAT Gateway or Internet Gateway connectivity. Gateway endpoints can also have endpoint policies that restrict which actions or resources are accessible. Interface endpoints use elastic network interfaces and are appropriate for many other supported AWS services and endpoint services.

Question 254. Which AWS networking feature can be used to create a private connection between two VPCs without requiring a centralized Transit Gateway?

1. VPC peering
2. AWS WAF
3. NAT Gateway
4. CloudFront

Correct Answer: 1. VPC peering

Explanation:

VPC peering creates a private network connection between two VPCs. Once the connection is established and the necessary routes are configured, resources in the VPCs can communicate using private IP addresses. VPC peering can be useful when only a small number of VPCs need direct connectivity and a centralized routing hub is unnecessary. However, peering connections are not transitive, so one peered VPC cannot automatically act as a router between other VPCs. For larger environments, AWS Transit Gateway can provide centralized connectivity and routing. When using VPC peering, CIDR ranges must also be designed appropriately to avoid overlapping address spaces.

Question 255. What is a key limitation of VPC peering that becomes important when designing connectivity among many VPCs?

1. It cannot use private IP addresses
2. It is not transitive
3. It requires all instances to have public IP addresses
4. It automatically routes all internet traffic

Correct Answer: 2. It is not transitive

Explanation:

VPC peering is not transitive. If VPC A is peered with VPC B and VPC B is peered with VPC C, VPC A cannot automatically send traffic through VPC B to reach VPC C. Each required communication relationship must have an appropriate direct connectivity path. This limitation can make large networks complicated if many VPCs need to communicate with one another. Transit Gateway provides an alternative hub-and-spoke architecture where multiple VPCs can attach to a centralized routing service. Understanding non-transitivity is important when troubleshooting peering connectivity because the presence of a peering connection does not mean that it can be used as a general-purpose transit router.

Question 256. Which AWS service provides a managed global network for connecting and centrally controlling multiple network segments across Regions and on-premises environments?

1. AWS Cloud WAN
2. AWS WAF
3. Amazon S3
4. AWS Certificate Manager

Correct Answer: 1. AWS Cloud WAN

Explanation:

AWS Cloud WAN provides a centralized framework for building and managing global wide area networks across AWS Regions, on-premises environments, branch locations, and other network infrastructure. It allows organizations to define network policies and logical segments rather than configuring every network connection independently. This can simplify global network administration and provide consistent segmentation and connectivity rules across a distributed enterprise. Cloud WAN works alongside underlying connectivity services such as Direct Connect and VPN. It is particularly useful when network teams need centralized visibility and policy management across geographically distributed environments instead of managing each regional network as a completely separate architecture.

Question 257. Which AWS service can provide a centralized view of network topology and connectivity across AWS and hybrid network environments?

1. AWS Network Manager
2. Amazon CloudFront
3. AWS WAF
4. Amazon S3

Correct Answer: 1. AWS Network Manager

Explanation:

AWS Network Manager provides centralized network management and visibility capabilities across AWS and supported hybrid environments. It can help network administrators understand topology and relationships among network resources such as Transit Gateways and hybrid connectivity components. This centralized view can simplify troubleshooting and operational monitoring in large environments containing multiple Regions, VPCs, branches, and on-premises locations. Network Manager complements services such as Transit Gateway, Direct Connect, and VPN rather than replacing them. Its role is focused on management, monitoring, and network visualization, making it useful for organizations that need to maintain a clear understanding of a complex global network architecture.

Question 258. Which network design allows an organization to use separate routing domains for production and development VPCs connected to the same Transit Gateway?

1. Separate Transit Gateway route tables
2. One shared security group
3. One public subnet
4. One NAT Gateway

Correct Answer: 1. Separate Transit Gateway route tables

Explanation:

Separate Transit Gateway route tables can create distinct routing domains for production, development, testing, or other network environments. Attachments can be associated with different route tables, and route propagation can be selectively enabled to determine which networks each domain can reach. For example, production VPCs can be prevented from learning development prefixes while both environments can receive routes to shared security or management services. This approach provides centralized segmentation without requiring separate Transit Gateways for every environment. The design must be carefully configured because route-table associations and route propagation together determine actual connectivity through the Transit Gateway.

Question 259. Which AWS feature can provide packet-level visibility for troubleshooting an application connection when flow metadata is insufficient?

1. Traffic Mirroring
2. VPC Flow Logs
3. Route 53 health checks
4. DNS Firewall

Correct Answer: 1. Traffic Mirroring

Explanation:

Traffic Mirroring can provide deeper packet-level visibility when metadata from VPC Flow Logs is not sufficient to diagnose a problem. It copies network traffic from a supported elastic network interface and sends the mirrored traffic toward a monitoring or security appliance. This can help network engineers inspect protocols, packet behavior, application communication, and security events at a much more detailed level than flow records provide. VPC Flow Logs are useful for identifying which endpoints communicated and whether traffic was accepted or rejected, but they do not provide the complete packet payload. Traffic Mirroring should therefore be considered when detailed packet analysis is required.

Question 260. Which AWS feature can help detect whether an application endpoint is healthy and remove an unhealthy endpoint from DNS-based traffic distribution when configured with Route 53 failover routing?

1. Route 53 health check
2. Transit Gateway route table
3. Direct Connect gateway
4. NAT Gateway

Correct Answer: 1. Route 53 health check

Explanation:

Route 53 health checks can monitor the health and availability of configured endpoints and can be used with routing policies such as failover routing. When a primary endpoint is determined to be unhealthy according to the configured health-check behavior, Route 53 can return the appropriate secondary resource in a failover configuration. This allows DNS-based traffic distribution to respond to endpoint health conditions. Health checks can evaluate supported endpoints and can also be integrated into more advanced monitoring architectures. It is important to understand that DNS failover is not the same as packet-level network failover; clients, DNS caching, TTLs, and application behavior can affect how quickly traffic shifts to another endpoint.