{"id":11654,"date":"2026-09-14T11:18:48","date_gmt":"2026-09-14T11:18:48","guid":{"rendered":"https:\/\/www.examlabs.com\/certification\/?p=11654"},"modified":"2026-09-14T11:18:48","modified_gmt":"2026-09-14T11:18:48","slug":"cisco-ccnp-300-410-practice-test-questions-and-exam-dumps-part-2-q21-40","status":"publish","type":"post","link":"https:\/\/www.examlabs.com\/certification\/cisco-ccnp-300-410-practice-test-questions-and-exam-dumps-part-2-q21-40\/","title":{"rendered":"Cisco CCNP 300-410 Practice Test Questions and Exam Dumps Part 2 \u2014 Q21\u201340"},"content":{"rendered":"

View Full\u00a0Cisco 300-410 Exam Dumps<\/a>\u00a0and Practice Test Dumps.<\/p>\n

 <\/p>\n

Q21. Which BGP attribute is normally preferred when selecting the best path on a Cisco router?<\/b><\/p>\n

    \n
  1. <\/b> MED<\/span>
    \n<\/span> 2.<\/b> Weight<\/span>
    \n<\/span> 3.<\/b> Origin<\/span>
    \n<\/span> 4.<\/b> AS-path<\/span><\/li>\n<\/ol>\n

    Correct Answer: 2. Weight<\/b><\/p>\n

    Explanation:<\/b> Cisco BGP uses the weight attribute as a local, Cisco-specific path-selection attribute. A higher weight is preferred over a lower weight. Unlike local preference, weight is not advertised to other BGP routers, so it affects only the local router’s path-selection decision. This makes weight useful when an administrator wants one router to prefer a particular BGP path without influencing other routers in the autonomous system. When troubleshooting BGP, administrators should examine the attributes of competing routes and determine which attribute caused the selected path to win.<\/span><\/p>\n

    Q22. Which BGP attribute is generally preferred when its value is lower?<\/b><\/p>\n

      \n
    1. <\/b> Local preference<\/span>
      \n<\/span> 2.<\/b> Weight<\/span>
      \n<\/span> 3.<\/b> MED<\/span>
      \n<\/span> 4.<\/b> Origin<\/span><\/li>\n<\/ol>\n

      Correct Answer: 3. MED<\/b><\/p>\n

      Explanation:<\/b> Multi-Exit Discriminator (MED) is a BGP attribute used to influence the path that another autonomous system should use when entering the local autonomous system. When comparing routes from the same neighboring autonomous system, a lower MED is generally preferred. MED is not normally propagated throughout an entire autonomous system in the same manner as local preference. Administrators commonly use MED when multiple links connect two autonomous systems and want to suggest a preferred inbound path. Understanding the scope and direction of BGP attributes is important when troubleshooting unexpected traffic flows.<\/span><\/p>\n

      Q23. Which command displays the BGP routing table on a Cisco router?<\/b><\/p>\n

        \n
      1. <\/b> show ip bgp<\/span>
        \n<\/span> 2.<\/b> show ip route ospf<\/span>
        \n<\/span> 3.<\/b> show bgp interface<\/span>
        \n<\/span> 4.<\/b> show routing bgp<\/span><\/li>\n<\/ol>\n

        Correct Answer: 1. show ip bgp<\/b><\/p>\n

        Explanation:<\/b> The <\/span>show ip bgp<\/span> command displays the BGP routing table, including known prefixes, next hops, path attributes, and the selected best paths. It is an important command when troubleshooting BGP route selection and advertisements. The BGP table can contain routes that are not installed in the IP routing table because another route may have a better administrative distance or because the BGP route is not considered valid. Administrators can use additional BGP commands to inspect neighbors, advertised routes, received routes, and specific prefixes. ENARSI troubleshooting frequently requires comparing the BGP table with the global routing table.<\/span><\/p>\n

        Q24. What is the primary purpose of BGP route reflectors?<\/b><\/p>\n

          \n
        1. <\/b> Encrypt BGP updates<\/span>
          \n<\/span> 2.<\/b> Replace all eBGP sessions<\/span>
          \n<\/span> 3.<\/b> Reduce the need for a full mesh of iBGP sessions<\/span>
          \n<\/span> 4.<\/b> Increase OSPF convergence<\/span><\/li>\n<\/ol>\n

          Correct Answer: 3. Reduce the need for a full mesh of iBGP sessions<\/b><\/p>\n

          Explanation:<\/b> BGP route reflectors improve iBGP scalability by allowing selected routers to reflect routes between iBGP clients. Without route reflection, traditional iBGP requires a full mesh, meaning every iBGP router must establish a session with every other iBGP router. This becomes difficult to manage as the number of routers increases. A route reflector reduces the number of required sessions while still allowing routes to be distributed throughout the autonomous system. Route-reflector configuration and troubleshooting are important ENARSI topics, particularly in larger enterprise or service-provider environments.<\/span><\/p>\n

          Q25. Which BGP session type is established between routers in different autonomous systems?<\/b><\/p>\n

            \n
          1. <\/b> iBGP<\/span>
            \n<\/span> 2.<\/b> eBGP<\/span>
            \n<\/span> 3.<\/b> OSPF<\/span>
            \n<\/span> 4.<\/b> EIGRP<\/span><\/li>\n<\/ol>\n

            Correct Answer: 2. eBGP<\/b><\/p>\n

            Explanation:<\/b> External BGP, or eBGP, is used to exchange routing information between routers belonging to different autonomous systems. Internal BGP, or iBGP, is used between BGP routers within the same autonomous system. eBGP is commonly used by organizations to connect to service providers or other autonomous systems. By default, eBGP peers typically have a directly connected relationship, although multihop configurations can support more distant peers. When troubleshooting eBGP, administrators should verify IP reachability, autonomous system numbers, neighbor configuration, update sources, TTL settings, and route policies.<\/span><\/p>\n

            Q26. Which command is most useful for verifying the status of BGP neighbor relationships?<\/b><\/p>\n

              \n
            1. <\/b> show ip bgp summary<\/span>
              \n<\/span> 2.<\/b> show ip ospf neighbor<\/span>
              \n<\/span> 3.<\/b> show interfaces summary<\/span>
              \n<\/span> 4.<\/b> show ip eigrp neighbors<\/span><\/li>\n<\/ol>\n

              Correct Answer: 1. show ip bgp summary<\/b><\/p>\n

              Explanation:<\/b> The <\/span>show ip bgp summary<\/span> command provides a concise overview of configured BGP neighbors and their current session state. It displays information such as the remote autonomous system, neighbor address, message counters, and the number of prefixes received. The state or prefix-count field is particularly useful for quickly determining whether a BGP session is established. If the neighbor is not established, further troubleshooting should examine reachability, AS numbers, authentication, source interfaces, TTL requirements, and filtering. This command is one of the most commonly used BGP troubleshooting tools in Cisco environments.<\/span><\/p>\n

              Q27. Which OSPF feature allows an ABR to advertise summarized routes between areas?<\/b><\/p>\n

                \n
              1. <\/b> Route tagging<\/span>
                \n<\/span> 2.<\/b> Route summarization<\/span>
                \n<\/span> 3.<\/b> Split horizon<\/span>
                \n<\/span> 4.<\/b> Passive interface<\/span><\/li>\n<\/ol>\n

                Correct Answer: 2. Route summarization<\/b><\/p>\n

                Explanation:<\/b> OSPF route summarization allows an Area Border Router to combine multiple specific routes into a summarized prefix when advertising routes between areas. This can reduce the size of routing tables and limit the impact of topology changes. Inter-area summarization is configured on the ABR using appropriate OSPF area range configuration. Summarization can improve scalability, but administrators must ensure that the summary accurately represents the underlying networks. ENARSI questions may test both inter-area and external route summarization, as well as the troubleshooting implications of incorrect summary configurations.<\/span><\/p>\n

                Q28. Which OSPF area type blocks Type 5 external LSAs and uses a default route to reach external destinations?<\/b><\/p>\n

                  \n
                1. <\/b> Backbone area<\/span>
                  \n<\/span> 2.<\/b> Standard area<\/span>
                  \n<\/span> 3.<\/b> Stub area<\/span>
                  \n<\/span> 4.<\/b> Transit area<\/span><\/li>\n<\/ol>\n

                  Correct Answer: 3. Stub area<\/b><\/p>\n

                  Explanation:<\/b> An OSPF stub area does not allow Type 5 external LSAs to enter the area. Instead, an ABR provides a default route so that routers inside the stub area can reach external destinations. This reduces the amount of external routing information that routers in the area need to maintain. Other specialized area types, such as totally stubby and NSSA areas, provide additional behavior. All routers participating in a stub area must have compatible stub-area configuration. When troubleshooting, administrators should verify area configuration on all relevant routers because mismatched area types can prevent OSPF adjacencies from forming.<\/span><\/p>\n

                  Q29. Which OSPF router type connects an OSPF area to another area?<\/b><\/p>\n

                    \n
                  1. <\/b> ASBR<\/span>
                    \n<\/span> 2.<\/b> Internal router<\/span>
                    \n<\/span> 3.<\/b> DR<\/span>
                    \n<\/span> 4.<\/b> ABR<\/span><\/li>\n<\/ol>\n

                    Correct Answer: 4. ABR<\/b><\/p>\n

                    Explanation:<\/b> An Area Border Router (ABR) has interfaces in multiple OSPF areas and connects those areas to the OSPF backbone. An ABR maintains separate link-state databases for its connected areas and can generate Type 3 summary LSAs to advertise routes between areas. An Autonomous System Boundary Router (ASBR), by contrast, connects OSPF to external routing sources and can redistribute routes into OSPF. Understanding the distinction between ABRs and ASBRs is important because each performs a different routing function. Troubleshooting inter-area routing often begins by verifying the ABR and its connectivity to Area 0.<\/span><\/p>\n

                    Q30. Which OSPF command displays the contents of the link-state database?<\/b><\/p>\n

                      \n
                    1. <\/b> show ip ospf database<\/span>
                      \n<\/span> 2.<\/b> show ip route ospf<\/span>
                      \n<\/span> 3.<\/b> show ip ospf interface brief<\/span>
                      \n<\/span> 4.<\/b> show ip protocols<\/span><\/li>\n<\/ol>\n

                      Correct Answer: 1. show ip ospf database<\/b><\/p>\n

                      Explanation:<\/b> The <\/span>show ip ospf database<\/span> command displays information about the OSPF link-state database. It can show different LSA types, including Router LSAs, Network LSAs, Summary LSAs, and external LSAs. Comparing the database between neighboring routers can help identify missing or unexpected LSAs. This is especially useful when troubleshooting situations where OSPF neighbors are established but routes are not appearing as expected. Administrators can also use more specific versions of the command to inspect individual LSA types or prefixes. A strong understanding of the OSPF database is essential for advanced ENARSI troubleshooting.<\/span><\/p>\n

                      Q31. Which EIGRP mechanism allows a router to immediately use an alternate loop-free route?<\/b><\/p>\n

                        \n
                      1. <\/b> Route reflector<\/span>
                        \n<\/span> 2.<\/b> Feasible successor<\/span>
                        \n<\/span> 3.<\/b> Designated router<\/span>
                        \n<\/span> 4.<\/b> Route target<\/span><\/li>\n<\/ol>\n

                        Correct Answer: 2. Feasible successor<\/b><\/p>\n

                        Explanation:<\/b> An EIGRP feasible successor is a backup route that satisfies the feasibility condition and can therefore be installed as an alternate path. If the current successor becomes unavailable, the router can use the feasible successor without performing an extensive query process. This contributes to rapid EIGRP convergence. The feasibility condition ensures that the backup route is considered loop-free. The topology table contains information about possible successors and their metrics. Understanding feasible successors is important when analyzing EIGRP convergence and determining why an alternate path was or was not available.<\/span><\/p>\n

                        Q32. Which EIGRP command displays neighboring routers and their adjacency information?<\/b><\/p>\n

                          \n
                        1. <\/b> show ip eigrp topology<\/span>
                          \n<\/span> 2.<\/b> show ip eigrp interfaces<\/span>
                          \n<\/span> 3.<\/b> show ip eigrp neighbors<\/span>
                          \n<\/span> 4.<\/b> show ip route eigrp<\/span><\/li>\n<\/ol>\n

                          Correct Answer: 3. show ip eigrp neighbors<\/b><\/p>\n

                          Explanation:<\/b> The <\/span>show ip eigrp neighbors<\/span> command displays information about EIGRP neighbor relationships. It includes details such as the neighbor’s address, interface, hold time, uptime, and queue information. This command is useful for determining whether EIGRP adjacencies are established and stable. If a neighbor is missing, administrators should investigate interface configuration, AS numbers, network statements, authentication, K values, and connectivity. The topology table provides route information, while the neighbor table focuses on EIGRP relationships. Correctly identifying whether the problem is an adjacency issue or a route-selection issue is an important ENARSI troubleshooting skill.<\/span><\/p>\n

                          Q33. What is the purpose of an EIGRP stub router?<\/b><\/p>\n

                            \n
                          1. <\/b> To prevent all EIGRP routing<\/span>
                            \n<\/span> 2.<\/b> To limit query propagation and improve network stability<\/span>
                            \n<\/span> 3.<\/b> To replace an EIGRP neighbor<\/span>
                            \n<\/span> 4.<\/b> To encrypt EIGRP updates<\/span><\/li>\n<\/ol>\n

                            Correct Answer: 2. To limit query propagation and improve network stability<\/b><\/p>\n

                            Explanation:<\/b> EIGRP stub routers are commonly used at network edges where the router should not be expected to provide transit paths through the network. By identifying a router as an EIGRP stub, the network can limit which routes it advertises and prevent unnecessary queries from propagating toward that router. This helps reduce the possibility of stuck-in-active conditions and improves convergence behavior. Stub configuration is particularly useful for branch-office routers. Administrators must select appropriate stub options based on the routes that the branch should advertise. EIGRP stub behavior is an important ENARSI design and troubleshooting topic.<\/span><\/p>\n

                            Q34. Which routing protocol uses the DUAL algorithm?<\/b><\/p>\n

                              \n
                            1. <\/b> OSPF<\/span>
                              \n<\/span> 2.<\/b> BGP<\/span>
                              \n<\/span> 3.<\/b> EIGRP<\/span>
                              \n<\/span> 4.<\/b> RIP<\/span><\/li>\n<\/ol>\n

                              Correct Answer: 3. EIGRP<\/b><\/p>\n

                              Explanation:<\/b> EIGRP uses the Diffusing Update Algorithm (DUAL) to calculate loop-free paths and support rapid convergence. DUAL evaluates information in the EIGRP topology table and identifies successors and feasible successors. The feasibility condition helps ensure that an alternate path is loop-free before it can be used immediately. If no feasible successor exists, EIGRP may query neighboring routers to discover another path. Understanding DUAL helps explain EIGRP behavior during topology changes. ENARSI preparation should include knowledge of successors, feasible successors, reported distance, feasible distance, passive states, active states, and EIGRP query boundaries.<\/span><\/p>\n

                              Q35. Which administrative distance is normally associated with OSPF routes on Cisco IOS?<\/b><\/p>\n

                                \n
                              1. <\/b> 90<\/span>
                                \n<\/span> 2.<\/b> 110<\/span>
                                \n<\/span> 3.<\/b> 120<\/span>
                                \n<\/span> 4.<\/b> 170<\/span><\/li>\n<\/ol>\n

                                Correct Answer: 2. 110<\/b><\/p>\n

                                Explanation:<\/b> Cisco IOS normally assigns OSPF an administrative distance of 110. Administrative distance determines which routing source is preferred when multiple routing protocols provide routes to the same destination. A lower administrative distance is preferred. For comparison, EIGRP internal routes normally have an administrative distance of 90, RIP uses 120, and external EIGRP routes use 170. Administrative distance should not be confused with a routing protocol’s metric. Metrics select routes within the same protocol, while administrative distance compares routes learned from different sources.<\/span><\/p>\n

                                Q36. Which administrative distance is normally assigned to internal EIGRP routes?<\/b><\/p>\n

                                  \n
                                1. <\/b> 90<\/span>
                                  \n<\/span> 2.<\/b> 100<\/span>
                                  \n<\/span> 3.<\/b> 110<\/span>
                                  \n<\/span> 4.<\/b> 120<\/span><\/li>\n<\/ol>\n

                                  Correct Answer: 1. 90<\/b><\/p>\n

                                  Explanation:<\/b> Internal EIGRP routes normally have an administrative distance of 90 on Cisco IOS. Because a lower administrative distance is preferred, an internal EIGRP route can normally be selected over an OSPF route with an administrative distance of 110 when both provide the same destination prefix. External EIGRP routes normally use an administrative distance of 170. Understanding administrative distance is important when multiple routing protocols operate simultaneously. When troubleshooting route selection, administrators should first determine which routes are present and then compare their administrative distances and protocol-specific metrics.<\/span><\/p>\n

                                  Q37. Which feature allows multiple routing protocols to operate independently using separate routing tables?<\/b><\/p>\n

                                    \n
                                  1. <\/b> NAT<\/span>
                                    \n<\/span> 2.<\/b> VRF<\/span>
                                    \n<\/span> 3.<\/b> DHCP<\/span>
                                    \n<\/span> 4.<\/b> EtherChannel<\/span><\/li>\n<\/ol>\n

                                    Correct Answer: 2. VRF<\/b><\/p>\n

                                    Explanation:<\/b> VRF provides separate routing and forwarding tables on the same physical router or multilayer device. This allows different routing domains to remain isolated even when they use overlapping IP addresses. Each VRF can have its own interfaces, routes, and routing processes. VRF is commonly used for customer separation, departmental isolation, and service-provider VPN architectures. When troubleshooting VRF, it is important to specify the correct VRF because a route may exist in one routing table but not another. ENARSI candidates should understand VRF configuration, route leaking concepts, and verification commands.<\/span><\/p>\n

                                    Q38. Which technology is commonly used to exchange IPv4 routes between separate VRF instances?<\/b><\/p>\n

                                      \n
                                    1. <\/b> Route leaking<\/span>
                                      \n<\/span> 2.<\/b> Split horizon<\/span>
                                      \n<\/span> 3.<\/b> NAT overload<\/span>
                                      \n<\/span> 4.<\/b> DHCP relay<\/span><\/li>\n<\/ol>\n

                                      Correct Answer: 1. Route leaking<\/b><\/p>\n

                                      Explanation:<\/b> Route leaking allows selected routes to be shared between otherwise separate VRF routing tables. By default, VRFs isolate routing information, so a route in one VRF is not automatically available to another. Controlled route leaking can be implemented when communication between specific VRFs is required. Administrators must carefully control which prefixes are exchanged to preserve the intended isolation. Route leaking is particularly relevant in enterprise segmentation and MPLS VPN designs. ENARSI troubleshooting may require determining whether a missing route is actually present in another VRF and whether appropriate import or export policies have been configured.<\/span><\/p>\n

                                      Q39. Which protocol is commonly used to provide first-hop redundancy for IPv4 hosts?<\/b><\/p>\n

                                        \n
                                      1. <\/b> HSRP<\/span>
                                        \n<\/span> 2.<\/b> OSPF<\/span>
                                        \n<\/span> 3.<\/b> BGP<\/span>
                                        \n<\/span> 4.<\/b> GRE<\/span><\/li>\n<\/ol>\n

                                        Correct Answer: 1. HSRP<\/b><\/p>\n

                                        Explanation:<\/b> Hot Standby Router Protocol (HSRP) provides first-hop redundancy by allowing multiple routers to present a shared virtual IP address to hosts. One router operates as the active router while another can remain in standby and take over if the active router fails. Hosts use the virtual IP address as their default gateway rather than depending on a single physical router. HSRP supports priority-based router selection and can use preemption. ENARSI troubleshooting includes verifying HSRP states, priorities, virtual IP addresses, tracking, and interface connectivity to determine why failover may not be occurring as expected.<\/span><\/p>\n

                                        Q40. Which HSRP state represents the router that is currently forwarding traffic for the virtual IP address?<\/b><\/p>\n

                                          \n
                                        1. <\/b> Listen<\/span>
                                          \n<\/span> 2.<\/b> Speak<\/span>
                                          \n<\/span> 3.<\/b> Standby<\/span>
                                          \n<\/span> 4.<\/b> Active<\/span><\/li>\n<\/ol>\n

                                          Correct Answer: 4. Active<\/b><\/p>\n

                                          Explanation:<\/b> In HSRP, the router in the Active state is responsible for forwarding traffic sent to the virtual MAC address associated with the HSRP group. A router in the Standby state is prepared to become Active if the current Active router fails. HSRP also uses other states during the process of discovering neighbors and establishing the group. Administrators can verify HSRP operation using commands such as <\/span>show standby<\/span>. If the expected router is not Active, troubleshooting should include checking HSRP priority, preemption, tracking, interface status, and the configured virtual IP address.<\/span><\/p>\n

                                           <\/p>\n","protected":false},"excerpt":{"rendered":"

                                          View Full\u00a0Cisco 300-410 Exam Dumps\u00a0and Practice Test Dumps.   Q21. Which BGP attribute is normally preferred when selecting the best path on a Cisco router? MED 2. Weight 3. Origin 4. AS-path Correct Answer: 2. Weight Explanation: Cisco BGP uses the weight attribute as a local, Cisco-specific path-selection attribute. A higher weight is preferred over […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1648,1647],"tags":[],"_links":{"self":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/11654"}],"collection":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/comments?post=11654"}],"version-history":[{"count":1,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/11654\/revisions"}],"predecessor-version":[{"id":11655,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/11654\/revisions\/11655"}],"wp:attachment":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/media?parent=11654"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/categories?post=11654"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/tags?post=11654"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}