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Cisco 642-902 Exam
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implementing cisco ip routing
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1. Into which two types of areas would an area border router (ABR) inject a default route? (Choose two.) Select 2 response(s). A. the autonomous system of a different interior gateway protocol (IGP) B. area 0 C. totally stubby D. NSSA E. stub F. the autonomous system of an exterior gateway protocol (EGP) Answer: CE
2. Which three restrictions apply to OSPF stub areas? (Choose three.) Select 3 response(s). A. No virtual links are allowed. B. The area cannot be a backbone area. C. Redistribution is not allowed unless the packet is changed to a type 7 packet. D. The area has no more than 10 routers. E. No autonomous system border routers are allowed. F. Interarea routes are suppressed. Answer: ABE
3. What are the two reasons for the appearance of 0.0.0.0 as the next hop for a network in the show ip bgp command output? (Choose two.) Select 2 response(s). A. The network was originated via redistribution of an interior gateway protocol into BGP. B. The network was defined by a static route. C. The network was originated via a network or aggregate command. D. The network was learned via EBGP. E. The network was learned via IBGP. Answer: AC
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4. How is authentication handled with OSPFv3? Select the best response. A. OSPFv3 for IPv6 authentication is supported by SHA-1 authentication. B. OSPFv3 for IPv6 authentication is supported by MD5 authentication. C. OSPFv3 for IPv6 authentication is supported by IPv6 IPsec. D. OSPFv3 for IPv6 authentication is supported by IPv4 IPsec. Answer: C
5. What two situations could require the use of multiple routing protocols? (Choose two) Select 2 response(s). A. when using UNIX host-based routers B. when smaller broadcast domains are desired C. because having multiple routing protocols confuses hackers D. when migrating from an older Interior Gateway Protocol (IGP) to a new IGP E. when all equipment is manufactured by Cisco F. when there are multiple paths to destination networks Answer: AD
6. During BGP configuration on a router that has peered with other BGP speakers, the BGP command aggregate-address 172.32.0.0 255.255.252.0 is issued. However, the peers do not receive this aggregate network in BGP advertisements. Also, the router does not have this aggregate network in its BGP table. Which option indicates a possible reason this command did not cause the router to advertise the aggregate network to its peers? Select the best response. A. Interface NULL 0 is likely shutdown. B. The BGP command no synchronization is missing. C. The BGP command no auto-summary is missing. D. Subnets of 172.32.0.0/22 do not exist in the BGP table.
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E. The IGP running on this router does not have network 172.32.0.0/22 installed. F. The next hop IP address must be a loopback address. Answer: D
7. By default, which statement is correct regarding the redistribution of routes from other routing protocols into OSPF? Select the best response. A. They will appear in the OSPF routing table as type E1 routes. B. They will appear in the OSPF routing table as type E2 routes. C. Summarized routes are not accepted. D. All imported routes will be automatically summarized when possible. E. Only routes with lower administrative distances will be imported. Answer: B
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