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

 

Question 21. An enterprise is designing connectivity between its data center and a public cloud. The organization requires a private connection with predictable performance and wants to avoid traversing the public Internet. Which option best addresses this requirement?

1. Internet-based GRE without encryption
2. Direct Internet access
3. Client-based SSL VPN
4. Dedicated cloud connectivity

Correct Answer: 4. Dedicated cloud connectivity

Explanation :-

Dedicated cloud connectivity provides a private path between an enterprise environment and a cloud provider through supported interconnection services. It is appropriate when requirements emphasize predictable connectivity, performance, security, and avoidance of the public Internet. Internet-based GRE still uses the public Internet, while a client-based VPN is designed for individual or remote-user access rather than primary enterprise-to-cloud interconnection. The final design should also consider redundancy, bandwidth, routing, QoS, provider availability, and business continuity requirements.

Question 22. A network architect is comparing Internet-based VPN connectivity with a dedicated cloud interconnection. Which characteristic is generally associated with an Internet-based IPsec solution?

1. It requires a private physical circuit between the enterprise and cloud
2. It can use the public Internet as the transport network
3. It eliminates the need for encryption
4. It always provides deterministic latency

Correct Answer: 2. It can use the public Internet as the transport network

Explanation :-

An Internet-based IPsec VPN uses the public Internet as its underlying transport while protecting traffic through encryption and integrity mechanisms. This can provide a comparatively flexible way to establish cloud connectivity without requiring a dedicated physical interconnection. However, Internet-based transport can introduce variability in latency, packet loss, and path characteristics. A dedicated interconnection uses a different transport model and can provide more predictable connectivity characteristics. The selection should be based on requirements involving cost, security, performance, availability, and operational considerations.

Question 23. An enterprise needs to determine whether its cloud connectivity design can support application traffic during peak business periods. Which requirement should be evaluated?

1. Bandwidth capacity
2. Router hostname length
3. DNS search-domain count
4. Interface description format

Correct Answer: 1. Bandwidth capacity

Explanation :-

Bandwidth capacity is a fundamental consideration when designing cloud connectivity. The architect should estimate normal and peak traffic requirements, application behavior, growth expectations, and potential failover conditions. A connection that is sufficient during normal operation may become a bottleneck during peak periods or when another redundant path fails. Other factors such as QoS, latency, packet loss, and provider service levels should also be considered. Hostname length, DNS search domains, and interface descriptions do not determine whether the physical or logical connectivity has sufficient capacity for application traffic.

Question 24. A company wants to prevent unnecessary Internet backhaul for users accessing cloud-hosted SaaS applications from branch offices. Which design approach can directly address this objective?

1. Force all traffic through the headquarters data center
2. Disable local Internet access
3. Use optimized SaaS-aware traffic forwarding
4. Route all SaaS traffic through an internal DNS server

Correct Answer: 3. Use optimized SaaS-aware traffic forwarding

Explanation :-

SaaS-aware traffic forwarding can allow branch traffic destined for cloud applications to use an appropriate path rather than unnecessarily traversing a centralized data center. In Cisco Catalyst SD-WAN environments, SaaS connectivity capabilities can identify application destinations and optimize path selection according to policy and network conditions. This can improve user experience and reduce unnecessary backhaul. DNS alone does not determine the complete forwarding path, and disabling local Internet access would not address the requirement. The exact design depends on security policy, application requirements, and available connectivity options.

Question 25. An organization requires two independent cloud connectivity paths so that maintenance on one path does not interrupt service. Which architecture characteristic is most important?

1. Single-homing
2. Multi-homing
3. Port mirroring
4. DNS load balancing only

Correct Answer: 2. Multi-homing

Explanation :-

Multi-homing provides multiple connectivity paths between the enterprise and the cloud environment. Properly designed redundant paths can allow traffic to continue when one circuit, provider connection, or attachment becomes unavailable. This is particularly useful for planned maintenance, provider failures, and other connectivity disruptions. Single-homed connectivity creates a potential single point of failure. DNS load balancing may distribute application requests but does not itself provide redundant network connectivity between the enterprise and cloud provider. The implementation should also consider routing convergence and path-selection behavior.

Question 26. A cloud-connected IOS XE router receives an unexpected route from its BGP peer. The engineer needs to prevent that prefix from being accepted. Which mechanism is most appropriate?

1. BGP route filtering
2. DHCP snooping
3. GRE keepalives
4. NTP authentication

Correct Answer: 1. BGP route filtering

Explanation :-

BGP route filtering allows an administrator to control which prefixes are accepted from or advertised to a BGP neighbor. Filtering can be implemented using mechanisms such as prefix lists and route maps, depending on the design. This is important in cloud connectivity because accidental acceptance or advertisement of unwanted routes can create routing problems or security exposure. DHCP snooping protects against certain Layer 2 attacks, GRE keepalives monitor tunnel conditions, and NTP authentication protects time synchronization. None of those mechanisms provides the required control over BGP route acceptance.

Question 27. An enterprise connects its cloud network to an IOS XE router using an IPsec tunnel. Application traffic fails because the packet size exceeds the effective path MTU after encapsulation. Which issue should the engineer investigate?

1. MTU and fragmentation behavior
2. BGP router ID naming
3. DNS zone delegation
4. DHCP lease renewal

Correct Answer: 1. MTU and fragmentation behavior

Explanation :-

IPsec and other tunnel encapsulations add overhead to packets, reducing the amount of payload that can traverse the effective path without fragmentation. If the resulting packet exceeds the path MTU and fragmentation or PMTUD behavior is not functioning as expected, applications may experience connectivity problems. Troubleshooting should include examining interface MTU, tunnel overhead, fragmentation, MSS considerations, and relevant ICMP behavior. BGP router IDs, DNS delegation, and DHCP lease renewal do not directly address an encapsulation-related packet-size problem.

Question 28. A network team wants to use OSPF between an enterprise router and a cloud-connected routing environment. Which consideration is important before selecting this design?

1. Whether OSPF is supported across the intended cloud connectivity architecture
2. Whether the router has a local DNS cache
3. Whether endpoint monitors use IPv6
4. Whether the cloud application uses HTTPS

Correct Answer: 1. Whether OSPF is supported across the intended cloud connectivity architecture

Explanation :-

Routing protocol selection must account for what the cloud connectivity service and architecture actually support. Although OSPF can be used in appropriate IOS XE routing designs, a cloud provider or connectivity service may impose specific routing options or limitations. The architect should verify protocol support, topology requirements, route exchange behavior, security considerations, and operational requirements before implementation. Application protocols such as HTTPS and unrelated endpoint characteristics do not determine whether OSPF can be used for the underlying cloud route exchange.

Question 29. A company wants to use an SD-WAN overlay to provide connectivity between branch offices and cloud workloads. Which component is responsible for enforcing centralized SD-WAN policies across the environment?

1. Local DHCP server
2. Branch access point
3. SD-WAN management and control infrastructure
4. Cloud DNS resolver

Correct Answer: 3. SD-WAN management and control infrastructure

Explanation :-

Cisco Catalyst SD-WAN uses centralized management and control components to distribute configuration and policy information across the SD-WAN fabric. This centralized architecture allows administrators to define routing, security, application-aware, and other policies rather than configuring every device independently. Individual branch devices execute the resulting policies locally, but centralized orchestration simplifies consistent policy deployment. DHCP servers, wireless access points, and DNS resolvers perform other network functions and do not provide the centralized SD-WAN policy-control role described in the scenario.

Question 30. A cloud connectivity design requires traffic classification so that business-critical applications receive preferential treatment during congestion. Which technology area should be incorporated into the design?

1. QoS
2. DNSSEC
3. DHCP relay
4. ARP inspection

Correct Answer: 1. QoS

Explanation :-

Quality of Service allows network traffic to be classified and treated according to defined requirements. In cloud connectivity designs, QoS can help prioritize latency-sensitive or business-critical applications when links become congested. The architect should consider classification, marking, queuing, scheduling, shaping, policing, and the capabilities of each network segment. DNSSEC protects DNS integrity, DHCP relay forwards DHCP messages between network segments, and ARP inspection helps protect Layer 2 environments. These functions do not provide application traffic prioritization during congestion.

Question 31. An enterprise wants cloud connectivity that remains operational when one cloud attachment fails. The routing design should automatically select another available path. Which capability is most relevant?

1. Static DNS entries
2. Dynamic routing and path failover
3. Endpoint antivirus
4. VLAN naming

Correct Answer: 2. Dynamic routing and path failover

Explanation :-

Dynamic routing and path-failover mechanisms allow the network to detect changes in connectivity and select an alternative available path. In cloud environments, this can involve BGP, SD-WAN path selection, or other supported routing mechanisms. Proper convergence and route-policy design are important because simply having two physical connections does not guarantee automatic failover. DNS entries, endpoint antivirus, and VLAN naming address different functions and do not directly provide network-level path failover.

Question 32. An engineer needs to verify whether an IOS XE router has learned the expected cloud prefixes through BGP. Which information should be examined?

1. ARP cache only
2. BGP routing information and the routing table
3. DHCP bindings only
4. Interface descriptions only

Correct Answer: 2. BGP routing information and the routing table

Explanation :-

BGP information and the routing table provide complementary visibility when troubleshooting cloud route learning. BGP information can show the status of the neighbor, received prefixes, attributes, and policy effects, while the routing table shows which routes were ultimately installed and selected for forwarding. Examining only interface descriptions or DHCP bindings would not establish whether the expected cloud prefixes were successfully learned and installed. A systematic troubleshooting process should also verify route filtering, administrative distance, next-hop reachability, and return-path behavior.

Question 33. A cloud application requires low latency, but the proposed architecture sends traffic through a distant centralized data center before reaching the cloud. Which design concern should be evaluated?

1. Unnecessary traffic backhaul
2. VLAN numbering
3. DHCP option formatting
4. Console authentication

Correct Answer: 1. Unnecessary traffic backhaul

Explanation :-

Backhauling cloud-bound traffic through a distant centralized location can introduce additional latency and consume WAN resources. When applications have latency-sensitive requirements, the architect should evaluate whether a more direct or optimized cloud path is appropriate. SD-WAN cloud connectivity and SaaS optimization can sometimes reduce unnecessary backhaul. The final decision must also consider security inspection, policy enforcement, compliance, and operational requirements. VLAN numbering, DHCP options, and console authentication do not directly address the path-related latency concern described.

Question 34. An organization requires secure cloud connectivity and wants to authenticate IPsec peers while protecting the confidentiality of transmitted traffic. Which technology provides these functions?

1. IPsec
2. STP
3. CDP
4. LLDP

Correct Answer: 1. IPsec

Explanation :-

IPsec provides a framework for securing IP communications through authentication, integrity protection, and encryption. In site-to-cloud VPN designs, IPsec can establish a protected tunnel between an enterprise device and a cloud VPN endpoint. Internet Key Exchange mechanisms can be used to negotiate security associations and authenticate peers, while IPsec provides protection for the data traffic. STP, CDP, and LLDP perform Layer 2 topology or neighbor-discovery functions and do not provide encrypted IP communications.

Question 35. An enterprise is selecting between shared and dedicated cloud connectivity. The architecture team wants to understand how each option affects performance, availability, and operational requirements. What should the team perform first?

1. Replace all existing routers
2. Define and document the business and technical requirements
3. Disable dynamic routing
4. Select the cheapest connectivity option

Correct Answer: 2. Define and document the business and technical requirements

Explanation :-

Cloud connectivity should be designed from documented business and technical requirements rather than selected solely from available technologies or price. Requirements should identify bandwidth, latency, availability, resiliency, security, QoS, routing, compliance, growth, and service-level expectations. These requirements can then be mapped against shared, dedicated, Internet-based, or other connectivity models. Establishing requirements first provides a defensible basis for architectural decisions and helps prevent selecting a connectivity model that cannot satisfy operational needs.

Question 36. A Catalyst SD-WAN deployment must restrict certain traffic entering a cloud-connected environment while permitting approved application flows. Which policy area should the administrator investigate?

1. Security policy
2. Interface naming policy
3. DNS cache policy
4. Hardware inventory policy

Correct Answer: 1. Security policy

Explanation :-

Security policies define how traffic is permitted, denied, inspected, or otherwise controlled according to the security architecture. In a Catalyst SD-WAN cloud connectivity design, security policy can be used to control traffic entering or leaving network segments and cloud environments. Application-aware policies may also participate in traffic classification and steering, but the requirement to restrict unauthorized traffic is fundamentally a security-policy concern. Interface names, DNS cache behavior, and hardware inventory do not directly enforce traffic-access restrictions.

Question 37. An administrator suspects that a cloud route is being advertised correctly by BGP but is not being installed in the routing table. Which factor should be investigated?

1. Route-selection criteria and competing routes
2. DNS TTL only
3. Switch port descriptions
4. DHCP lease duration

Correct Answer: 1. Route-selection criteria and competing routes

Explanation :-

A BGP route can be received successfully but still fail to become the active routing-table entry because another route may be preferred. The administrator should examine route attributes, administrative distance, next-hop reachability, competing routing sources, and policy decisions. It is important to distinguish between receiving a route through BGP and having that route selected for forwarding. DNS TTL, switch descriptions, and DHCP lease duration do not determine whether a BGP route becomes the active route.

Question 38. A cloud connectivity engineer wants to determine whether traffic is actually traversing an established IPsec tunnel. Which information is particularly useful?

1. Router uptime alone
2. IPsec security-association status and traffic counters
3. DNS cache entries
4. Local user account names

Correct Answer: 2. IPsec security-association status and traffic counters

Explanation :-

IPsec security-association information can show whether the tunnel security relationships are established, while traffic counters can indicate whether packets are being encrypted and decrypted. These indicators are useful when a tunnel appears operational but application traffic is not working. The engineer should correlate this information with routing, interface statistics, access policies, and cloud-side configuration. Router uptime, DNS cache contents, and local user account names provide little direct evidence about whether traffic is actively traversing the IPsec tunnel.

Question 39. A business wants cloud connectivity to support future traffic growth without requiring an immediate redesign. Which design principle should be considered?

1. Use the smallest possible connection regardless of projected demand
2. Eliminate redundancy to simplify the design
3. Plan for scalability and expected growth
4. Avoid documenting capacity requirements

Correct Answer: 3. Plan for scalability and expected growth

Explanation :-

A scalable cloud connectivity architecture accounts for expected traffic growth, additional workloads, new branches, application expansion, and changing business requirements. Capacity planning should consider both current utilization and future demand, including potential failover scenarios where remaining links may need to carry additional traffic. Designing only for current minimum usage can result in expensive redesigns later. Scalability should be evaluated together with bandwidth, redundancy, routing, QoS, provider capabilities, and service-level requirements.

Question 40. During troubleshooting, an engineer determines that an IPsec tunnel is established and routes are present, but only one direction of application traffic succeeds. Which issue should be investigated as a priority?

1. Router hostname configuration
2. Asymmetric routing or missing return-path configuration
3. DNS search-domain order only
4. Device serial-number registration

Correct Answer: 2. Asymmetric routing or missing return-path configuration

Explanation :-

When traffic succeeds in one direction but fails in the other, the return path should be examined carefully. Asymmetric routing, missing routes, incorrect next-hop information, cloud-side routing, security policies, or tunnel selectors can cause one-way communication. An established IPsec security association and a populated routing table on one device do not guarantee that the remote side has an appropriate return path. Troubleshooting should therefore correlate forwarding information on both sides, tunnel traffic counters, security policies, and cloud-side route configuration.