View Full Cisco CCNP Enterprise 300-440 Exam Dumps  and Practice Test Dumps

 

Question 261. An enterprise is designing cloud connectivity for an application that requires high availability, predictable latency, and encrypted communication. Which combination of requirements should drive the connectivity design?

1. DNS availability and hostname conventions only
2. Router naming and interface descriptions
3. Performance, resiliency, security, and connectivity requirements
4. OSPF process numbers and BGP router IDs

Correct Answer: 3. Performance, resiliency, security, and connectivity requirements

Explanation :-

Cloud connectivity should be designed from documented application and business requirements rather than from a particular technology preference. Performance requirements can include bandwidth, latency, jitter, and packet loss. Resiliency requirements determine whether redundant paths, providers, or facilities are needed. Security requirements determine whether encryption, inspection, segmentation, or private connectivity is necessary. Connectivity requirements define how the cloud and enterprise networks should exchange traffic. Once these requirements are established, engineers can evaluate dedicated connectivity, IPsec, SD-WAN, routing protocols, and other technologies against the actual needs of the application.

Question 262. A company has two independent cloud connections and wants to ensure that the loss of one connection does not interrupt routing to the cloud. Which routing design should be considered?

1. Dynamic routing with redundant paths
2. A single static route with no backup
3. DNS-based path selection only
4. A disabled secondary interface

Correct Answer: 1. Dynamic routing with redundant paths

Explanation :-

Dynamic routing can automatically exchange reachability information and converge toward an available path when one connectivity link fails. When combined with genuinely independent cloud connections, it can provide automatic recovery without requiring manual route changes. BGP or OSPF may be appropriate depending on the cloud architecture and routing requirements. A single static route without a tracking or backup mechanism does not provide equivalent resilience. DNS-based selection is also not a substitute for network-layer convergence. The design should additionally verify that the redundant connections do not share a common failure domain.

Question 263. A cloud-connected router learns the same destination through eBGP and OSPF. Both routes are valid, and default Cisco administrative distances are unchanged. Which route is normally installed?

1. OSPF because it is an interior routing protocol
2. Both routes regardless of administrative distance
3. OSPF because its metric is evaluated before administrative distance
4. eBGP because its administrative distance is lower than OSPF

Correct Answer: 4. eBGP because its administrative distance is lower than OSPF

Explanation :-

By default, external BGP has an administrative distance of 20, while OSPF has an administrative distance of 110 on Cisco IOS XE. When the same destination is learned from both protocols, the eBGP route is normally preferred because the lower administrative distance indicates a more trusted routing source. After the routing protocol is selected, its own path-selection process determines the preferred path within that protocol. Engineers should verify whether administrative distances have been customized because changes to these values can alter the normal route-selection behavior.

Question 264. A cloud provider advertises multiple prefixes to an enterprise, but the enterprise should accept only application-specific networks. Which control provides the most direct protection against unwanted advertisements?

1. Increasing the BGP keepalive interval
2. An inbound prefix filter or route policy
3. Changing the IPsec encryption algorithm
4. Increasing the interface MTU

Correct Answer: 2. An inbound prefix filter or route policy

Explanation :-

An inbound routing policy can restrict which prefixes the enterprise accepts from the cloud provider. Prefix lists, route maps, or equivalent policy mechanisms can explicitly permit required application networks and reject unwanted routes. This prevents unexpected prefixes, including potentially an unwanted default route, from entering the enterprise routing domain. BGP keepalive settings affect session maintenance rather than route filtering. IPsec encryption and interface MTU address different technical requirements. After applying the policy, engineers should verify both the BGP table and the active routing table to confirm that the intended prefixes are available.

Question 265. A business-critical application uses a cloud connection that has sufficient bandwidth but experiences unacceptable jitter. Which additional characteristic should be included in the connectivity requirements?

1. Router hostname length
2. DNS search-domain count
3. BGP autonomous-system numbering
4. Quality-of-service and jitter requirements

Correct Answer: 4. Quality-of-service and jitter requirements

Explanation :-

Bandwidth does not fully describe network performance for applications that are sensitive to delay variation. Voice, video, and other real-time applications may require defined limits for jitter, latency, and packet loss. QoS policies can help prioritize traffic during congestion, while the underlying connectivity service must still meet the application’s transport requirements. The design should document measurable performance objectives and determine how they will be monitored. Router names, DNS search domains, and BGP AS numbering do not describe the network characteristics that determine whether the application receives acceptable performance.

Question 266. An engineer wants a cloud-connected application to use a particular WAN transport only when latency and packet loss remain within defined limits. Which SD-WAN capability addresses this requirement?

1. Static hostname mapping
2. OSPF route summarization
3. Application-aware path selection using performance thresholds
4. Manual modification of DNS records

Correct Answer: 3. Application-aware path selection using performance thresholds

Explanation :-

Application-aware SD-WAN policies can evaluate measured path characteristics such as latency, jitter, and packet loss against defined thresholds. The policy can select a preferred transport when it satisfies the application’s requirements and use another available path when those requirements are no longer met. This provides dynamic path selection based on actual network conditions rather than relying exclusively on static routing. OSPF summarization and DNS modifications do not provide this type of performance-aware forwarding. Thresholds should be based on realistic application requirements to prevent unnecessary path changes.

Question 267. An organization needs to protect traffic between an enterprise network and a public cloud while using the Internet as the transport. Which technology directly provides confidentiality for the traffic?

1. IPsec encryption
2. OSPF authentication alone
3. BGP local preference
4. DNSSEC

Correct Answer: 2. IPsec encryption

Explanation :-

IPsec provides network-layer security mechanisms that can protect traffic over an untrusted transport such as the public Internet. Depending on the configuration, IPsec can provide confidentiality, integrity, authentication, and anti-replay protection. This makes it a common choice for encrypted site-to-site cloud connectivity over Internet links. BGP local preference controls routing decisions, while OSPF authentication protects routing-protocol exchanges rather than providing general application traffic confidentiality. DNSSEC protects DNS data integrity and authenticity but does not encrypt arbitrary network traffic between enterprise and cloud networks.

Question 268. A cloud-connected enterprise uses BGP to advertise internal routes. The engineer discovers that a required subnet is not being advertised to the cloud neighbor even though the subnet exists in the local routing table. Which area should be investigated?

1. Outbound BGP policy and route origination
2. DNS recursive resolution
3. IPsec anti-replay settings
4. OSPF hello packet size only

Correct Answer: 1. Outbound BGP policy and route origination

Explanation :-

A route being present in the local routing table does not automatically guarantee that it will be advertised to a BGP neighbor. The engineer should verify how the route is being originated into BGP and whether outbound prefix lists, route maps, or other routing policies permit the subnet. Redistribution configuration, network statements, aggregation, and policy conditions may all affect advertisement. DNS and IPsec settings do not directly determine whether a BGP route is advertised. Examining the advertised-route information for the specific cloud neighbor can confirm whether the prefix is actually being sent.

Question 269. A cloud VPN is operational, but users report that only large file transfers fail while small transactions work normally. Which issue is most likely worth investigating?

1. BGP local preference
2. OSPF router ID
3. MTU, fragmentation, and MSS handling
4. DNS domain delegation

Correct Answer: 3. MTU, fragmentation, and MSS handling

Explanation :-

Applications that fail only when transmitting larger packets can indicate an MTU or fragmentation problem. IPsec encapsulation adds overhead and reduces the effective payload size available across the underlying transport. If packets exceed the effective path MTU, fragmentation or packet loss can occur. Engineers should examine interface and tunnel MTUs, Path MTU Discovery, ICMP behavior, and TCP MSS adjustment where appropriate. BGP local preference and OSPF router ID affect routing rather than packet size. DNS delegation is unrelated to packet-size-dependent forwarding failures.

Question 270. A company wants Internet-bound traffic from branch locations to reach SaaS applications directly instead of being sent through the headquarters data center. What should be evaluated before enabling local Internet breakout?

1. Only the BGP router ID
2. Only the DNS server address
3. Only the WAN interface description
4. Security inspection, routing policy, and application requirements

Correct Answer: 4. Security inspection, routing policy, and application requirements

Explanation :-

Local Internet breakout can reduce unnecessary backhaul and improve application performance, but it must be evaluated alongside security and routing requirements. The organization may require firewall inspection, URL filtering, malware protection, logging, NAT, or other controls before traffic reaches the Internet. Application requirements should also determine whether direct breakout is appropriate for each traffic class. Simply enabling local Internet access without considering these factors can bypass centralized controls or violate policy. SD-WAN policies can help select local breakout while maintaining the required security and performance behavior.

Question 271. A cloud provider offers two private connectivity circuits, but both circuits terminate on the same physical provider device. The enterprise wants protection from provider-device failure. What is the primary concern?

1. Both circuits share a common failure domain
2. The circuits use different IP addresses
3. The BGP sessions use different timers
4. The cloud networks have different DNS names

Correct Answer: 1. Both circuits share a common failure domain

Explanation :-

Two circuits do not necessarily provide meaningful redundancy if they depend on the same physical infrastructure. A failure of the shared provider device could interrupt both connections simultaneously. To improve resilience, the enterprise should consider diverse provider devices, facilities, physical paths, or providers depending on the required availability level. Routing redundancy can then operate across genuinely independent paths. Engineers should therefore examine the physical and logical dependencies behind each cloud connection rather than assuming that multiple interfaces or circuits automatically eliminate a single point of failure.

Question 272. An engineer needs to confirm whether a cloud BGP peer has advertised a specific prefix to the enterprise. Which information should be examined?

1. IPsec security-association lifetime
2. BGP routes received from the cloud neighbor
3. DNS cache entries
4. OSPF interface descriptions

Correct Answer: 2. BGP routes received from the cloud neighbor

Explanation :-

BGP received-route information directly indicates which prefixes are being received from a specific neighbor. This allows the engineer to distinguish between a prefix that was never advertised and one that was received but subsequently rejected or not selected. If the prefix is present in the BGP table, further investigation can focus on inbound policy, next-hop reachability, best-path selection, and administrative distance. IPsec lifetime, DNS cache entries, and OSPF interface descriptions do not directly verify BGP advertisements received from the cloud peer.

Question 273. A company wants cloud traffic to pass through a centralized firewall before moving between two private application networks. Which traffic pattern is primarily being secured?

1. Internet DNS traffic
2. North-south traffic only
3. East-west traffic
4. BGP keepalive traffic

Correct Answer: 4. East-west traffic

Explanation :-

Traffic moving between internal application networks or workload segments is generally classified as east-west traffic. Centralized firewall inspection can be used to control this lateral communication and enforce segmentation requirements. North-south traffic instead describes traffic entering or leaving the cloud environment, such as Internet access. BGP keepalives are control-plane messages rather than an application traffic-direction classification. When designing east-west inspection, engineers should also consider routing symmetry, firewall capacity, high availability, and failure behavior so that security controls do not become an unintended single point of failure.

Question 274. An enterprise has two equal-cost paths to a cloud environment and wants both paths to forward traffic under normal conditions. Which forwarding behavior should be considered?

1. DNS failover
2. IPsec rekeying
3. Equal-cost multipath forwarding
4. OSPF passive-interface mode

Correct Answer: 3. Equal-cost multipath forwarding

Explanation :-

Equal-cost multipath forwarding allows multiple equivalent routes to participate in packet forwarding. This can improve utilization of redundant cloud connections while also providing resilience if one path becomes unavailable. The exact behavior depends on the routing protocol, platform capabilities, and forwarding configuration. DNS failover does not provide equivalent network-layer path selection, while IPsec rekeying and OSPF passive-interface settings serve different purposes. Before implementing ECMP, engineers should confirm that the available paths have appropriate capacity and that application requirements tolerate the resulting forwarding behavior.

Question 275. A cloud provider advertises a default route and several private prefixes. The enterprise must accept the private prefixes but continue using its existing Internet gateway. Which policy should be applied?

1. Inbound BGP filtering that rejects the default route and permits required private prefixes
2. Outbound filtering that rejects all enterprise routes
3. OSPF redistribution of all cloud routes
4. IPsec encryption without routing policy

Correct Answer: 1. Inbound BGP filtering that rejects the default route and permits required private prefixes

Explanation :-

The enterprise needs selective control over routes received from the cloud provider. An inbound BGP policy can permit the required private prefixes while explicitly rejecting the default route. This prevents the cloud provider from unintentionally becoming the enterprise’s Internet exit while preserving cloud reachability. Outbound filtering controls routes sent to the provider rather than routes received from it. OSPF redistribution and IPsec encryption do not directly provide the required BGP route-selection control. The resulting routing table should be checked to confirm that the expected private prefixes remain installed.

Question 276. An IPsec tunnel shows increasing outbound encrypted-packet counters but no corresponding inbound decrypted-packet counters. Which troubleshooting approach is appropriate?

1. Change the local DNS domain
2. Investigate the remote path, return routing, and VPN selectors
3. Increase the OSPF process number
4. Change the BGP router ID

Correct Answer: 2. Investigate the remote path, return routing, and VPN selectors

Explanation :-

Increasing outbound encryption counters indicate that packets are being processed locally for IPsec, but the absence of inbound decrypted traffic suggests that the return path or remote VPN processing should be investigated. Possible causes include incorrect remote traffic selectors, remote security policy, missing return routes, NAT problems, or a remote tunnel issue. Engineers should compare IPsec counters and security associations on both sides and trace the packet path where possible. DNS, OSPF process numbering, and BGP router IDs do not directly explain the lack of inbound decrypted traffic.

Question 277. An enterprise requires cloud connectivity to remain within defined latency and availability limits. Which operational practice best validates that the connectivity service continues to satisfy those requirements?

1. Monitor measured performance against defined service-level thresholds
2. Check only whether the interface is administratively up
3. Verify only the BGP router ID
4. Monitor only DNS query counts

Correct Answer: 1. Monitor measured performance against defined service-level thresholds

Explanation :-

Operational validation should compare measured connectivity behavior with the requirements defined during the design phase. Monitoring can include latency, jitter, packet loss, availability, bandwidth utilization, and other relevant service characteristics. An interface being up only confirms a limited portion of network status and does not prove that application requirements are being satisfied. Likewise, BGP router IDs and DNS query counts do not provide sufficient evidence of transport quality. Continuous measurement allows engineers to identify degradation and determine whether provider or network changes are required.

Question 278. A cloud BGP route is received and is the best BGP path, but it is not installed in the routing table because another routing source is preferred. Which concept should the engineer examine?

1. TCP MSS
2. DNS recursion
3. Administrative distance
4. IPsec perfect forward secrecy

Correct Answer: 4. Administrative distance

Explanation :-

BGP best-path selection determines the preferred route among BGP paths, but the resulting BGP route can still lose to a route from another routing protocol when routes to the same destination are compared. Administrative distance is used to determine the preference among different routing sources. Therefore, an engineer troubleshooting a best BGP route that is not installed should compare the BGP route with competing routes from other protocols and examine their administrative distances. This distinction is important when integrating BGP cloud connectivity with OSPF, static routes, or other routing mechanisms.

Question 279. An organization wants to ensure that only authorized enterprise networks are advertised toward a cloud provider after route redistribution is configured. Which verification is most direct?

1. Examine the cloud neighbor’s BGP advertised-route information
2. Check DNS resolution from a workstation
3. Check OSPF hello timers
4. Examine IPsec replay counters only

Correct Answer: 2. Examine the cloud neighbor’s BGP advertised-route information

Explanation :-

Advertised-route information for the specific cloud BGP neighbor provides direct visibility into the prefixes being sent toward that neighbor. This is especially useful after redistribution because redistribution can introduce more routes into BGP than the provider should receive. Engineers can compare the advertised set with the intended prefix policy and identify unexpected advertisements or missing networks. DNS resolution, OSPF hello timers, and IPsec replay counters address different operational areas and do not directly verify BGP outbound advertisements.

Question 280. An enterprise is validating a redundant cloud connectivity design. One WAN path is intentionally disabled during testing. Which result provides the strongest evidence that the failover design meets its requirements?

1. The disabled interface remains administratively down
2. The BGP router IDs remain unchanged
3. DNS continues resolving internal hostnames
4. Traffic converges to the surviving path while application performance remains within required thresholds

Correct Answer: 3. DNS continues resolving internal hostnames

Explanation :-

A meaningful failover test must validate more than the detection of a failed interface. The network should detect the failure, converge toward the surviving path, and continue forwarding application traffic while meeting the defined performance requirements. This includes checking routing convergence, path selection, available capacity, latency, packet loss, and application behavior during the degraded condition. DNS functionality alone does not demonstrate that cloud connectivity has successfully failed over. A complete validation should therefore test the actual traffic flows and compare their performance with the application’s documented availability and service-level requirements.