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Cisco CCNP 642-902

642-902

Exam Code: 642-902

Exam Name: Implementing cisco ip routing

Updated: Aug 10, 2026

Q & A: 375 Questions and Answers

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Cisco 642-902 Exam Syllabus Topics:

SectionObjectives
Topic 1: OSPF Implementation- OSPFv2 and OSPFv3 configuration
  • 1. LSA types and areas
    • 2. Neighbor adjacency formation
      - OSPF optimization
      • 1. Route summarization
        • 2. Stub and NSSA areas
          Topic 2: Network Principles and Routing Fundamentals- IPv4/IPv6 addressing and subnetting
          • 1. Route summarization
            • 2. IPv6 addressing architecture
              - Routing protocol concepts
              • 1. Routing table operations
                • 2. Administrative distance and metrics
                  Topic 3: Infrastructure Services and Maintenance- Device management and verification
                  • 1. Logging and monitoring
                    • 2. IOS troubleshooting tools
                      Topic 4: EIGRP Implementation- EIGRP optimization and troubleshooting
                      • 1. Stub routing
                        • 2. Load balancing
                          - EIGRP fundamentals
                          • 1. DUAL algorithm basics
                            • 2. Neighbor relationships
                              Topic 5: BGP Implementation- EBGP and IBGP configuration
                              • 1. Neighbor relationships
                                - BGP path selection
                                • 1. Attributes and decision process
                                  Topic 6: Route Redistribution and Path Control- Path selection and filtering
                                  • 1. Policy-based routing basics
                                    - Route redistribution concepts
                                    • 1. Metrics and administrative distance issues

                                      Cisco Implementing cisco ip routing Sample Questions:

                                      1. Refer to the exhibit.

                                      A new TAC engineer came to you for advice. A GRE over IPsec tunnel was configured, but the tunnel is not coming up.
                                      What did the TAC engineer configure incorrectly?

                                      A) The OSPF network is not configured correctly.
                                      B) The crypto map is not configured correctly.
                                      C) The crypto map is not applied to the correct interface.
                                      D) The crypto ACL is not configured correctly.


                                      2. An engineer is trying to summarize the following networks using the "ip summary-address eigrp" command:
                                      10.8.88.0/25 10.8.89.48/29 10.8.64.96/27
                                      Which network and subnet mask below would be the smallest EIGRP summary address to include all three subnets?

                                      A) 10.8.64.0 255.255.128.0
                                      B) 10.8.0.0 255.255.192.0
                                      C) 10.8.64.0 255.255.224.0
                                      D) 10.8.64.0 255.255.192.0


                                      3. Refer to the exhibit.

                                      When you examine the routing tables of R1 and R4, you are not able to see the R1 Ethernet subnet on the R4 routing table. You are also not able to see the R4 Ethernet subnet on the R1 routing table.
                                      Which two configuration changes should be made to resolve this issue? Select the routers where the configuration change will be required, and select the required EIGRP configuration command(s). Choose two answers. (Choose two.)

                                      A) R2 and R3
                                      B) R1 and R4
                                      C) no auto-summary
                                      D) eigrp stub connected
                                      E) ip summary-address eigrp 1 10.1.1.0 255.255.255.0 and ip summary-address eigrp 1
                                      10.2.2.0 255.255.255.0
                                      F) variance 2


                                      4. Which command displays the number of times that the OSPF Shortest Path First (SPF) algorithm has been executed?

                                      A) show ip ospf database
                                      B) show ip protocol
                                      C) show ip ospf interface
                                      D) show ip ospf


                                      5. Refer to the exhibit.

                                      AS 65500 is running OSPF as its IGP and has two eBGP connections to the Internet provider AS 65501. The provider requires that you advertise all of the prefixes in AS 65500 to the provider as a single 192.168.12.0/22 route. Currently only Routers A and B are able to reach the Internet. Which of the following additions to the configuration will solve this issue?

                                      A) RouterA(config)# ip route 192.168.12.0 255.255.252.0 null 0
                                      B) RouterA(config-router)#redistribute ospf 1
                                      C) RouterA(config-router)#neighbor 192.168.14.253 next-hop-self
                                      D) RouterA(config-router)#ebgp multihop 1
                                      E) RouterA(config-router)#neighbor 192.168.14.253 local-as 65500
                                      F) RouterA(config)#ip cef


                                      Solutions:

                                      Question # 1
                                      Answer: D
                                      Question # 2
                                      Answer: C
                                      Question # 3
                                      Answer: A,C
                                      Question # 4
                                      Answer: D
                                      Question # 5
                                      Answer: A

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