Cisco 642-902 : Implementing cisco ip routing

  • Exam Code: 642-902
  • Exam Name: Implementing cisco ip routing
  • Updated: Sep 10, 2026     Q & A: 375 Questions and Answers

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Cisco 642-902 Exam Syllabus Topics:

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

                                      Cisco Implementing cisco ip routing Sample Questions:

                                      Question #1

                                      Refer to the exhibit. A new TAC engineer comes to you for advice. The engineer wants to configure RIPv2- OSPF two-way redistribution while avoiding routing loops.
                                      Which two additions to the router B1 configuration should the engineer make? (Choose two.)

                                      • A. access-list 40 deny 172.16.1.0 0.0.0.255 access-list 40 permit any router rip redistribute ospf 100 metric 5 distribute-list 40 out ospf 100
                                      • B. ip prefix-list rip-to-ospf permit 10.1.1.8/25 ge 26 le 28 route-map redis-rip deny 20 match ip address prefix-list rip-to-ospf router ospf 100 redistribute rip route-map redis-rip subnets
                                      • C. access-list 15 deny 10.1.1.0 0.0.0.63 access-list 15 permit any route-map redis-rip deny 10 match ip address 15 route-map redis-rip permit 20 router ospf 100 redistribute rip route-map redis-rip subnets
                                      • D. ip prefix-list rip_routes permit 172.16.1.16/25 ge 26 le 28 route-map redis-ospf deny 10 match ip address prefix-list rip_routes router rip redistribute ospf 10 route-map redis-ospf subnets
                                      Reveal Solution  Discussion  0

                                      Correct Answer: A,C  🗳️

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                                      Question #2

                                      Refer to the exhibit.

                                      Routers RTA and RTB are running BGP but the session is active. What command needs to be added to establish the BGP session?

                                      • A. network 10.10.10.0
                                      • B. ip route 10.10.10.1 255.255.255.255 s0/0 ip route 10.10.10.1 255.255.255.255 s0/1
                                      • C. no synchronization
                                      • D. neighbor 10.10.10.1 next-hop-self
                                      Reveal Solution  Discussion  0

                                      Correct Answer: B  🗳️

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                                      Question #3

                                      Based on the exhibited output, which three statements are true? (Choose three.)

                                      • A. The route to 10.2.0.0/16 was redistributed into EIGRP.
                                      • B. A default route has been redistributed into the EIGRP autonomous system.
                                      • C. R1 is configured with the ip summary-address command.
                                      • D. R1 is sourcing an external EIGRP route from Null0.
                                      • E. R1 is configured with the variance command.
                                      • F. The router at 10.1.1.2 is configured with the ip default-network 0.0.0.0 command.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: B,C,E  🗳️

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                                      Question #4

                                      Refer to the exhibit.

                                      What is the effect of the OSPF configuration on router B?

                                      • A. All interfaces will be in area 0.
                                      • B. The router will be an ABR with s1/0 in area 0 and f0/0 and 0/1 in area 2.
                                      • C. The router will be an ABR with s1/0 in area 0, f0/0 in area 1, and f0/1 in area 2.
                                      • D. The router will be an ABR with s1/0 in area 0 and f0/0 and 0/1 in area 1.
                                      Reveal Solution  Discussion  0

                                      Correct Answer: C  🗳️

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                                      Question #5

                                      What is a key benefit of using a GRE tunnel to provide connectivity between branch offices and headquarters?

                                      • A. open standard
                                      • B. scalability
                                      • C. authentication, integrity checking, and confidentiality
                                      • D. dynamic routing over the tunnel
                                      • E. less overhead
                                      • F. granular QoS support
                                      Reveal Solution  Discussion  0

                                      Correct Answer: D  🗳️

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