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Question 301

Which Cloud DNS policy can distribute responses among multiple record values?

1. Weighted routing policy
2. Inbound forwarding policy
3. DNS peering policy
4. Response inspection policy

Correct Answer: 1

Explanation:

A weighted routing policy in Cloud DNS can distribute DNS responses among multiple record sets according to configured weights. This can support traffic distribution scenarios where different endpoints should receive different proportions of DNS queries. The mechanism operates at the DNS response level rather than directly controlling packets after resolution. Inbound forwarding policies address queries entering Google Cloud DNS from external sources, while DNS peering provides namespace visibility between networks. A weighted routing approach can therefore be useful for controlled traffic distribution, gradual migrations, or directing different portions of DNS clients toward separate service endpoints.

Question 302

What does a Cloud Router BGP session establish with its configured peer?

1. DNS synchronization
2. Dynamic route exchange
3. Firewall policy inheritance
4. NAT address allocation

Correct Answer: 2

Explanation:

A Cloud Router BGP session establishes dynamic routing communication with a configured peer. Once the session is operating correctly, the participating routers can exchange route information according to their respective advertisements and routing policies. DNS synchronization is unrelated to BGP, firewall policies are evaluated independently, and NAT address allocation is handled by Cloud NAT. BGP sessions are particularly important in hybrid environments because they allow route changes to be communicated dynamically rather than requiring every route to be manually configured. This makes hybrid connectivity easier to operate as network topology changes.

Question 303

Which firewall attribute can restrict traffic to a specific TCP destination port?

1. Network tag
2. Source range
3. Protocol and port
4. Service account

Correct Answer: 3

Explanation:

Google Cloud VPC firewall rules can specify protocols and destination ports to control which application traffic is permitted or denied. For example, a rule can target TCP traffic on a particular port while separately defining its source and target scope. Network tags and service accounts identify applicable VM instances, while source ranges describe where traffic originates. Protocol and port conditions therefore provide the application-level filtering component of a firewall rule. Combining these conditions with appropriate targets and source ranges allows administrators to create narrowly scoped network access policies.

Question 304

What does a subnet secondary range provide for supported workloads?

1. A public DNS namespace
2. An additional IP address range
3. A dedicated VPN gateway
4. A replacement for the primary subnet

Correct Answer: 2

Explanation:

A secondary subnet range provides an additional IP address range associated with an existing subnet. Secondary ranges are commonly used for workloads that require separate address spaces, including certain container networking architectures. The secondary range does not create a public DNS namespace or VPN gateway, and it does not replace the subnet’s primary range. Instead, it supplements the primary addressing structure. Careful planning is important because secondary ranges must remain compatible with the overall VPC address plan and should not overlap with other ranges that need to communicate with the network.

Question 305

Which Cloud Interconnect option uses a Google Cloud partner instead of a direct physical connection to Google?

1. Dedicated Interconnect
2. Partner Interconnect
3. HA VPN
4. Cloud Router

Correct Answer: 2

Explanation:

Partner Interconnect provides connectivity to Google Cloud through a supported service provider rather than requiring the customer to establish a direct physical connection at a Google colocation facility. Dedicated Interconnect uses dedicated physical connections between the customer’s network and Google’s network. HA VPN provides encrypted connectivity over tunnels rather than an Interconnect circuit, while Cloud Router supplies dynamic routing capabilities and is not itself an Interconnect transport option. Partner Interconnect can be useful when an organization needs hybrid connectivity but prefers to use an established connectivity provider.

Question 306

Which load balancer property determines whether a backend is considered capable of serving traffic?

1. Health-check status
2. DNS TTL
3. Route priority
4. NAT port mapping

Correct Answer: 1

Explanation:

Health-check status determines whether a load balancer considers a backend healthy enough to receive traffic. Google Cloud load balancers use configured health checks to evaluate backend responsiveness and availability. DNS TTL controls how long DNS responses may be cached, route priority influences routing decisions, and NAT port mapping concerns address translation. Health-check configuration should reflect the actual service behavior so that healthy backends remain available while failed or unresponsive endpoints can be removed from active traffic distribution. This mechanism helps improve application availability and prevents traffic from being sent unnecessarily to unhealthy backends.

Question 307

What is the primary role of Cloud NAT for VM instances without external IP addresses?

1. Accepting unsolicited internet connections
2. Translating outbound private addresses
3. Advertising BGP routes
4. Creating private DNS zones

Correct Answer: 2

Explanation:

Cloud NAT provides source network address translation for eligible outbound connections from resources that do not have external IP addresses. It allows such workloads to initiate communication with external destinations while keeping their internal addresses private. Cloud NAT does not normally provide unsolicited inbound connectivity to those workloads, nor does it perform BGP route advertisement or create DNS zones. This makes Cloud NAT useful for private workloads that need controlled outbound access, such as software updates or calls to external APIs, without assigning public addresses directly to each VM.

Question 308

Which Network Connectivity Center resource attaches a supported network to a hub?

1. Spoke
2. Forwarding rule
3. DNS policy
4. Route advertisement

Correct Answer: 1

Explanation:

A Network Connectivity Center spoke connects a supported networking resource or network to an NCC hub. The hub serves as the central connectivity construct, while spokes represent the connected resources participating in the NCC architecture. A forwarding rule belongs to load-balancing configuration, DNS policies manage DNS behavior, and route advertisements concern routing information. Using spokes allows organizations to organize multiple connectivity sources under a central NCC design. This can simplify management when an environment contains multiple VPC networks or hybrid connectivity resources that need to participate in a broader connectivity architecture.

Question 309

Which route characteristic identifies the destination addresses to which the route applies?

1. Next-hop identity
2. Route name
3. Destination range
4. BGP ASN

Correct Answer: 3

Explanation:

The destination range specifies the IP address space for which a route is applicable. When traffic is evaluated against routing information, the destination address is compared with available route prefixes. The matching route can then determine the appropriate next hop according to route selection rules. The next-hop identity specifies where matching traffic should be sent, but it does not define the destination prefix itself. A route name is simply an identifier, while a BGP ASN identifies a routing system rather than a destination range. Correct destination ranges are fundamental to predictable packet forwarding.

Question 310

Which Cloud VPN design feature improves resilience against tunnel failure?

1. Multiple redundant tunnels
2. A single shared DNS record
3. One static forwarding rule
4. A larger subnet mask

Correct Answer: 1

Explanation:

Multiple redundant VPN tunnels can improve resilience by providing alternative encrypted paths between connected networks. If one tunnel becomes unavailable, another configured path can continue carrying traffic when the overall routing design supports failover. A DNS record does not provide VPN tunnel redundancy, and a forwarding rule or subnet mask does not independently create an alternate encrypted path. Redundancy should be considered together with routing, peer-gateway configuration, and physical or logical path diversity. This approach helps reduce dependence on one tunnel or one connectivity component.

Question 311

What does an internal IP address primarily provide to a VM within its VPC?

1. Public internet identity
2. Private network reachability
3. DNSSEC signing capability
4. BGP peer authentication

Correct Answer: 2

Explanation:

An internal IP address provides private network identity and reachability for a VM within its VPC environment. It can be used for communication with other resources according to applicable routes, firewall rules, and service configurations. An internal address does not itself provide a public internet identity, DNSSEC signing capability, or BGP authentication. External connectivity can be added through appropriate Google Cloud networking services when required. Using internal addresses wherever public exposure is unnecessary is an important part of designing controlled cloud network architectures.

Question 312

Which feature allows a VPC to use IPv6 addresses alongside IPv4 addressing?

1. Dual-stack configuration
2. DNS forwarding
3. Cloud NAT
4. Route logging

Correct Answer: 1

Explanation:

Dual-stack networking allows supported resources and network components to operate with both IPv4 and IPv6 addressing. This provides a transition and coexistence model where applications can communicate using either address family according to the architecture. DNS forwarding handles name-resolution forwarding, Cloud NAT performs address translation for supported outbound traffic, and route logging provides visibility rather than adding an address family. Dual-stack planning requires attention to subnet configuration, firewall behavior, application compatibility, and routing. It can help organizations introduce IPv6 without immediately eliminating their existing IPv4 infrastructure.

Question 313

What is the purpose of a Cloud DNS forwarding target?

1. To receive DNS queries forwarded by Cloud DNS
2. To assign VM IP addresses
3. To advertise VPC routes
4. To terminate VPN tunnels

Correct Answer: 1

Explanation:

A Cloud DNS forwarding target is a DNS server that receives queries forwarded by Cloud DNS according to the applicable forwarding configuration. This allows Google Cloud workloads to resolve names that are hosted by external or private DNS infrastructure. The target is therefore part of name-resolution architecture rather than IP address allocation, route advertisement, or VPN termination. Forwarding can be particularly useful when an organization maintains internal DNS zones outside Google Cloud and needs cloud workloads to resolve those names without duplicating the entire namespace in Cloud DNS.

Question 314

Which VPC feature enables DNS names from another VPC to be resolved through peering relationships?

1. Cloud NAT
2. DNS peering
3. Packet Mirroring
4. Cloud Armor

Correct Answer: 2

Explanation:

DNS peering allows DNS information from one VPC environment to be made available for resolution from another VPC according to the configured DNS peering relationship. This can support name resolution across separately managed network environments. Cloud NAT provides outbound address translation, Packet Mirroring copies traffic for inspection, and Cloud Armor provides network-edge security controls. DNS peering is therefore specifically concerned with namespace resolution rather than packet forwarding or traffic filtering. It can be useful when applications in one network need to resolve private service names maintained in another network.

Question 315

Which firewall targeting method can select instances associated with a specific service account?

1. Service account target
2. DNS target
3. Route target
4. NAT target

Correct Answer: 1

Explanation:

VPC firewall rules can use service accounts as a targeting mechanism for applicable VM instances. This allows network access policies to follow workload identities rather than depending solely on manually maintained IP addresses or tags. DNS targets and route targets are not equivalent VPC firewall targeting mechanisms, and NAT targets do not define firewall scope. Service-account targeting can be useful in environments where workloads have clearly defined identities and security policies need to remain aligned with those identities as instances change.

Question 316

What does Cloud Router primarily provide in a hybrid network architecture?

1. DNS caching
2. Dynamic route management
3. Packet payload encryption
4. Application-layer filtering

Correct Answer: 2

Explanation:

Cloud Router provides dynamic route management through BGP for supported hybrid connectivity configurations. It can exchange route information with peer routers and help Google Cloud learn or advertise network prefixes dynamically. DNS caching is handled by DNS services, packet encryption is provided by technologies such as Cloud VPN, and application-layer filtering can be performed by services such as Cloud Armor. Cloud Router therefore acts as the dynamic routing component rather than the encryption or application-security component. It is especially important when hybrid routes need to adapt to changing network conditions.

Question 317

Which service provides a managed DNS namespace within Google Cloud?

1. Cloud DNS
2. Cloud Router
3. Cloud NAT
4. Cloud Interconnect

Correct Answer: 1

Explanation:

Cloud DNS provides managed DNS functionality for hosting and serving DNS zones and records. It allows organizations to manage domain information without operating their own authoritative DNS infrastructure for those zones. Cloud Router handles dynamic routing, Cloud NAT performs outbound address translation, and Cloud Interconnect provides dedicated or partner-based network connectivity. Cloud DNS can also participate in broader hybrid name-resolution designs through forwarding and peering capabilities. Its role is therefore focused on DNS management and resolution rather than packet routing or physical connectivity.

Question 318

What does route priority help determine when multiple routes match a destination?

1. Which DNS server responds
2. Which matching route is preferred
3. Which firewall policy is inherited
4. Which subnet receives IPv6

Correct Answer: 2

Explanation:

Route priority helps determine which applicable route is preferred when multiple routes can match traffic. Google Cloud routing first considers the relevant destination prefixes and then uses route-selection rules, including priority where applicable, to choose among competing routes. DNS response selection, firewall policy inheritance, and IPv6 subnet assignment are separate mechanisms. Understanding route priority is important when troubleshooting unexpected forwarding behavior because a route that appears valid may not be selected if another applicable route has stronger selection characteristics. Proper route planning helps avoid ambiguous forwarding outcomes.

Question 319

Which load-balancing construct defines the IP address and protocol entry point for traffic?

1. Backend service
2. Health check
3. Forwarding rule
4. Instance template

Correct Answer: 3

Explanation:

A forwarding rule defines an entry point for traffic into a Google Cloud load-balancing architecture. Depending on the load-balancer type, it can specify information such as the frontend IP address, protocol, and relevant port configuration. The backend service controls backend-related behavior, while a health check determines backend health. An instance template defines VM configuration and is not itself the load-balancer frontend. Understanding the forwarding rule is useful when diagnosing frontend connectivity because it connects incoming traffic characteristics to the appropriate load-balancing target.

Question 320

Which service can provide private access to supported Google APIs from resources without external addresses?

1. Cloud Armor
2. Private Google Access
3. Cloud CDN
4. Packet Mirroring

Correct Answer: 2

Explanation:

Private Google Access enables eligible resources without external IP addresses to reach supported Google APIs and services through Google’s infrastructure. This allows workloads to remain privately addressed while accessing required Google-managed functionality. Cloud Armor provides security controls, Cloud CDN accelerates content delivery, and Packet Mirroring provides traffic copies for analysis. Private Google Access is therefore the feature that specifically addresses private access from appropriately configured resources to supported Google services. It is commonly considered when designing workloads that should avoid direct public IP exposure while still depending on Google APIs.