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

 

Question 241. An enterprise is connecting its private data center to a cloud environment through two independent service providers. 

1. Use identical routing policies on every device without exception
2. Keep both providers dependent on the same physical path
3. Disable route convergence between the providers
4. Eliminate common failure domains between the connectivity paths

Correct Answer: 4. Eliminate common failure domains between the connectivity paths

Explanation :-

Connectivity redundancy is most effective when the paths are genuinely independent. If two providers share the same physical facility, circuit, provider edge, or transport path, a single failure can affect both connections. Designing for provider, facility, and path diversity reduces these common failure domains. Routing protocols and SD-WAN mechanisms can then provide automatic failover or traffic distribution. The design should therefore evaluate physical and logical dependencies rather than simply counting the number of circuits. Independence should be validated with the providers so that the apparent redundancy represents meaningful protection against the failure scenarios identified in the availability requirements.

Question 242. A cloud-connected router receives several BGP paths for the same prefix. The administrator wants to prefer routes learned from one internal source over another before considering AS-path length. Which attribute is commonly used?

1. MED
2. Local preference
3. Originator ID
4. Cluster-list

Correct Answer: 2. Local preference

Explanation :-

Local preference is commonly used to influence outbound path selection within an autonomous system. A higher local-preference value is preferred over a lower value when the BGP best-path process reaches that attribute. This makes it useful when an enterprise has multiple paths toward a cloud environment and wants internal routers to prefer one exit. MED can influence path selection in applicable inter-AS scenarios, while originator ID and cluster-list are primarily associated with route-reflector behavior. The engineer should apply local preference consistently and verify that the resulting best path matches the intended traffic-engineering policy.

Question 243. A cloud application uses a private connection that meets its bandwidth requirement but has excessive packet loss during peak periods. Which additional service characteristic should be evaluated?

1. DNS record lifetime
2. BGP router ID
3. Packet-loss performance requirements
4. OSPF process number

Correct Answer: 3. Packet-loss performance requirements

Explanation :-

Bandwidth alone does not define the quality of a cloud connectivity service. Packet loss can significantly affect application performance, particularly for interactive, transactional, voice, video, and other sensitive workloads. The design should therefore define acceptable packet-loss thresholds in addition to bandwidth, latency, jitter, and availability requirements where appropriate. Monitoring should measure actual service behavior against those requirements. DNS record lifetime, BGP router ID, and OSPF process number do not directly describe transport quality. If peak-period loss violates the application’s requirements, the organization may need to review the service, capacity, traffic engineering, or provider SLA.

Question 244. An organization wants a cloud workload to communicate with an application in another private cloud segment, but all traffic between the segments must pass through a security appliance. Which architecture should be considered?

1. Service insertion or a centralized security inspection path
2. Unrestricted direct routing between the segments
3. DNS-based traffic forwarding
4. Disabling inter-segment routing

Correct Answer: 1. Service insertion or a centralized security inspection path

Explanation :-

Service insertion or centralized security inspection can force traffic between cloud segments through a security appliance before it reaches the destination. This architecture allows security controls such as firewalls or intrusion-prevention systems to inspect and enforce policy on east-west traffic. Simply providing unrestricted direct routing may bypass the required inspection point, while disabling routing would prevent legitimate communication altogether. The implementation must also consider routing symmetry, appliance availability, throughput, and failure behavior. The selected architecture should ensure that both the forwarding path and the security policy remain functional during normal and degraded conditions.

Question 245. An engineer is troubleshooting a cloud BGP connection. The session is established, but a specific prefix is received and marked as valid yet is not selected as the best path. What should be examined?

1. DNS server reachability
2. Interface description text
3. BGP path-selection attributes and competing routes
4. IPsec encryption algorithm name

Correct Answer: 3. BGP path-selection attributes and competing routes

Explanation :-

A valid BGP route is not necessarily the route selected for forwarding. When multiple paths exist for the same prefix, BGP evaluates its best-path process using attributes and other conditions. The engineer should compare the competing routes and examine relevant values such as weight, local preference, locally originated routes, AS-path length, origin, MED, and other applicable criteria. The exact selection sequence depends on the Cisco implementation and configuration. DNS settings, interface descriptions, and the encryption algorithm do not determine which BGP path becomes the best route. The BGP table should therefore be compared with the active routing table.

Question 246. A company uses Cisco SD-WAN and wants SaaS traffic to avoid an unnecessary trip through its central data center. Which design approach directly supports this objective?

1. Force all traffic through the headquarters router
2. Disable application-aware policies
3. Use only static routes
4. Use SD-WAN cloud/SaaS connectivity and appropriate local breakout policies

Correct Answer: 4. Use SD-WAN cloud/SaaS connectivity and appropriate local breakout policies

Explanation :-

Cisco SD-WAN can use application-aware policies and cloud/SaaS connectivity capabilities to provide more direct paths to supported cloud applications. This can reduce unnecessary Internet backhaul through a centralized data center. The exact policy should consider application identification, transport performance, security inspection, and organizational requirements. Local breakout does not mean that security controls should be bypassed; appropriate firewalling and other protections may still be required. Forcing all traffic through headquarters would retain the backhaul that the design is trying to avoid, while static routing alone does not provide application-aware path selection.

Question 247. A cloud provider advertises a default route through BGP, but the enterprise already has a preferred Internet exit. What should the engineer configure to prevent accidental installation of the cloud default route?

1. An inbound route filter for the default prefix
2. A larger Ethernet MTU
3. An OSPF router ID change
4. An IPsec lifetime adjustment

Correct Answer: 1. An inbound route filter for the default prefix

Explanation :-

An inbound BGP route filter can prevent an unwanted default route from being accepted while allowing required cloud-specific prefixes to continue entering the routing table. This provides granular control over routing information received from the cloud provider. The policy can use a prefix list, route map, or another supported routing-policy mechanism. Changing MTU, OSPF router ID, or IPsec lifetime does not directly control BGP route acceptance. After implementing the filter, the engineer should verify both the BGP table and the active routing table to confirm that the default route is excluded and required routes remain available.

Question 248. A company requires a cloud connection to support voice traffic with strict latency and jitter requirements. Which design factor should be evaluated in addition to available bandwidth?

1. Hostname length
2. Latency, jitter, and packet-loss characteristics
3. Number of DNS suffixes
4. BGP router ID format

Correct Answer: 2. Latency, jitter, and packet-loss characteristics

Explanation :-

Voice applications are sensitive to delay, variation in delay, and packet loss. Therefore, selecting a cloud connectivity service based only on bandwidth can produce an inadequate design. The engineering team should evaluate latency, jitter, packet loss, availability, and any applicable SLA commitments. QoS may also be required when voice shares transport capacity with other traffic. These characteristics should be measured across the relevant end-to-end path rather than assumed from the access-link bandwidth. Hostnames, DNS suffixes, and BGP router IDs do not describe the transport characteristics that determine voice quality.

Question 249. An enterprise uses two cloud connections in an active-active design. After one link fails, the remaining link becomes heavily congested. Which planning activity would have identified this issue?

1. DNS caching analysis
2. OSPF database synchronization
3. Failure-state capacity planning
4. Increasing BGP keepalive timers

Correct Answer: 4. Failure-state capacity planning

Explanation :-

Active-active designs should be evaluated under both normal and failure conditions. When one path fails, the surviving connection may need to carry traffic that was previously distributed across both links. Failure-state capacity planning determines whether the remaining path has sufficient bandwidth and performance to support the expected load. Without this analysis, a design can technically provide failover while still causing severe congestion after a failure. Engineers should model expected traffic volumes, routing convergence, application requirements, and available capacity for the degraded state before approving the architecture.

Question 250. An IPsec cloud tunnel shows established security associations, but traffic from the local application subnet does not enter the tunnel. Which item should be verified?

1. BGP community values only
2. OSPF cost on unrelated links
3. DNS recursive queries
4. Local traffic selectors or crypto ACL matching

Correct Answer: 3. DNS recursive queries

Explanation :-

For a policy-based IPsec design, the local crypto ACL or traffic selectors determine which traffic is considered interesting and should be protected. If application traffic does not match the configured local and remote protected networks, it may not be encrypted even though the security associations are established. The engineer should compare the actual application source and destination addresses with the configured selectors and verify the corresponding remote configuration. BGP communities, unrelated OSPF costs, and DNS recursion do not determine whether a packet matches the IPsec encryption policy.

Question 251. A cloud provider requires the enterprise to advertise a small set of prefixes, but the enterprise uses route redistribution to populate BGP. Which configuration provides the most precise control over the advertisements?

1. An outbound prefix list or route policy
2. A larger IPsec tunnel lifetime
3. A DNS forwarding rule
4. An OSPF passive interface

Correct Answer: 2. An outbound prefix list or route policy

Explanation :-

Outbound BGP policy provides precise control over which prefixes are advertised to a cloud neighbor. This is particularly important when redistribution introduces more routes into BGP than the provider should receive. A prefix list can define permitted networks, while a route policy can apply additional matching and attribute actions when required. An IPsec lifetime, DNS forwarding, or OSPF passive-interface configuration does not determine which BGP prefixes are advertised. Engineers should verify the resulting advertised-route set from the perspective of the specific cloud neighbor.

Question 252. A network team wants to verify whether a cloud BGP neighbor is advertising the expected prefixes before investigating route installation problems. Which information should be examined?

1. IPsec replay counters
2. BGP routes received from the neighbor
3. DNS cache records
4. OSPF interface descriptions

Correct Answer: 1. BGP routes received from the neighbor

Explanation :-

BGP received-route information helps determine whether the expected prefixes are actually being advertised by the cloud neighbor and received by the enterprise router. If a prefix is absent from the received routes, the problem may exist on the remote advertisement or along the BGP policy path. If it is present but not installed, the engineer can then investigate next-hop reachability, best-path selection, administrative distance, and other factors. IPsec counters and OSPF information can be useful for separate troubleshooting tasks but do not directly confirm which BGP routes were received.

Question 253. A cloud environment uses multiple application segments. The security team wants to ensure that Internet-bound traffic from those segments is inspected by a centralized firewall before egress. Which traffic direction is being controlled?

1. East-west traffic only
2. OSPF control traffic
3. North-south outbound traffic
4. BGP route-reflector traffic

Correct Answer: 3. North-south outbound traffic

Explanation :-

Traffic leaving private cloud workloads toward the Internet is considered north-south outbound traffic. A centralized firewall can inspect this traffic before it exits the cloud environment, applying security, NAT, logging, and other required policies. East-west traffic instead refers to lateral communication between internal workloads or segments. OSPF and BGP exchanges are routing-control traffic rather than application traffic-direction classifications. When designing centralized Internet egress, engineers should also consider routing symmetry, firewall capacity, high availability, source NAT requirements, and what should happen if the security service becomes unavailable.

Question 254. An engineer discovers that a cloud BGP route has a reachable next hop but still is not the selected path. Another route to the same prefix is preferred by the local BGP process. What should be investigated next?

1. DNS TTL values
2. BGP best-path attributes of the competing routes
3. IPsec key exchange lifetime only
4. Ethernet duplex settings

Correct Answer: 4. BGP best-path attributes of the competing routes

Explanation :-

Once next-hop reachability is confirmed, the engineer should compare the BGP attributes of the competing paths. Depending on the platform and configuration, factors such as weight, local preference, locally originated routes, AS-path length, origin, MED, and other criteria can influence best-path selection. A route can therefore be valid and reachable without becoming the active BGP path. DNS TTL, IPsec key-exchange lifetime, and Ethernet duplex settings do not determine BGP best-path selection. Examining the complete competing-route information is essential for identifying the reason the expected path is not preferred.

Question 255. A company wants to use an Internet-based IPsec connection for cloud access but requires automatic recovery if the primary tunnel becomes unavailable. Which additional capability is needed?

1. A secondary path combined with reliable failure detection and routing convergence
2. A larger DNS cache
3. A static hostname for the VPN peer
4. Disabling routing advertisements

Correct Answer: 2. A secondary path combined with reliable failure detection and routing convergence

Explanation :-

Automatic recovery requires both an alternative path and a mechanism to detect that the preferred path has failed. The routing system or SD-WAN policy must then select the surviving path and update forwarding accordingly. Depending on the architecture, tunnel monitoring, BFD, IP SLA, routing-protocol timers, or SD-WAN performance detection may contribute to this process. Simply configuring a second tunnel without a suitable detection and routing mechanism does not guarantee failover. DNS caching or hostname configuration also does not provide network-path convergence.

Question 256. A cloud provider offers a dedicated connection with a committed bandwidth value. The enterprise must determine whether the service can support an application requiring a specific throughput during peak periods. What should be evaluated?

1. Only the BGP router ID
2. Peak application demand compared with available committed capacity
3. Only DNS query volume
4. OSPF area numbering

Correct Answer: 1. Only the BGP router ID

Explanation :-

The key consideration is whether the committed capacity is sufficient for the application’s expected peak traffic. Capacity planning should compare application demand, protocol overhead, concurrent workloads, and growth requirements with the available service bandwidth. Engineers should also consider whether other applications share the connection and whether QoS policies affect traffic treatment during congestion. BGP router IDs, DNS query volume, and OSPF area numbering do not determine whether the dedicated circuit has sufficient application throughput. Capacity should be evaluated for both normal operation and expected failure scenarios where redundant links may need to carry additional traffic.

Question 257. An enterprise wants a branch application to use one SD-WAN transport when it meets defined latency and loss thresholds and another transport when it does not. What is the primary purpose of the thresholds?

1. To identify acceptable path performance for policy-based selection
2. To determine DNS server priority
3. To assign BGP autonomous-system numbers
4. To modify IPsec encryption algorithms

Correct Answer: 4. To identify acceptable path performance for policy-based selection

Explanation :-

Performance thresholds define the conditions under which a network path is considered suitable for an application. SD-WAN can measure characteristics such as latency, jitter, and packet loss and compare them with policy-defined requirements. If the preferred transport falls outside the acceptable range, policy can select another qualifying path. The thresholds therefore translate application performance requirements into actionable path-selection criteria. They do not determine DNS priority, BGP autonomous-system numbers, or cryptographic algorithms. Thresholds should be based on realistic application requirements to avoid unnecessary path changes or excessive sensitivity to transient measurements.

Question 258. A cloud security policy must allow application traffic between two internal segments but block all other lateral communication. Which approach provides the required control?

1. Permit all traffic between the segments and rely on routing
2. Define explicit security rules for the required application flows and deny unauthorized traffic
3. Disable all inter-segment routing
4. Increase the BGP hold timer

Correct Answer: 3. Define explicit security rules for the required application flows and deny unauthorized traffic

Explanation :-

Security policy should explicitly identify the application flows that are permitted and prevent unauthorized lateral communication. A firewall, security group, network ACL, or distributed security mechanism can enforce these rules depending on the cloud architecture. Routing alone establishes reachability but does not necessarily provide the required application-level access control. Disabling all inter-segment routing would also block legitimate communication. BGP hold timers are unrelated to traffic authorization. The policy should be tested to confirm both permitted application flows and denied unauthorized flows.

Question 259. A network engineer observes that a cloud route is present in BGP but absent from the IP routing table because another routing protocol has a more preferred route to the same destination. Which concept explains this behavior?

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

Correct Answer: 1. Administrative distance

Explanation :-

Administrative distance determines the relative preference of routes learned from different routing sources. If a destination is learned through BGP and another routing protocol and the competing route has a lower administrative distance, the competing route can be installed instead of the BGP route. The BGP route can remain visible in the BGP table while not becoming the active route in the IP routing table. Engineers should distinguish administrative distance, which compares different routing sources, from BGP best-path selection, which compares paths within BGP.

Question 260. A cloud connectivity design uses two WAN transports. During normal operation, application traffic is distributed across both paths. During a failure, traffic must move to the surviving path without violating application performance requirements. Which validation is most important?

1. Verify only that both interfaces have descriptions
2. Validate routing convergence and application performance during the failure condition
3. Verify only DNS resolution under normal conditions
4. Confirm that the BGP router ID is different on both interfaces

Correct Answer: 2. Validate routing convergence and application performance during the failure condition

Explanation :-

A resilient design should be validated under the actual failure condition rather than only during normal operation. Testing should confirm that the failed path is detected, routing or SD-WAN policy converges, traffic moves to the surviving transport, and the remaining path has sufficient capacity and acceptable performance. Application-level validation is important because routing convergence alone does not prove that service requirements are still satisfied. Interface descriptions, DNS behavior, and BGP router IDs do not provide sufficient evidence that the complete failover process meets the application’s availability and performance requirements.