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單項選擇題 DR (Designated Router) is for environments where many routers on the same network such as Ethernet. In the following presented network, all routers are reloaded simultaneously, and DR is selected as expected. What is the RTC status?（）

A. 2WAY/DR
B. FULL/DR
C. FULL/DROTHER
D. FULL/BDR

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1.多項選擇題What are two Cisco IOS commands that can be used to view neighbor adjacencies?（）

A. show ip ospf interfaces
B. show ip ospf protocols
C. show ip ospf neighbors
D. show ip ospf database

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2.多項選擇題Which three are advantages to creating multiple areas in OSPF? (Choose three.) Select 3 response(s)？（）

A. less frequent SPF calculations
B. fewer hello packets
C. smaller routing tables
D. reduced LSU overhe ad
E. fewer adjacencies needed

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3.單項選擇題Which show command will display only the Type 5 LSAs in the OSPF topology database？（）

A. show ip ospf database external
B. show ip ospf database nssa - external
C. show ip route ospf
D. show ip ospf datab ase summary
E. show ip route

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4.單項選擇題 Refer to the diagram. Which OSPF configuration command is required to configure Area 3 a s atotally stubby area?（）

A. On the ABR router ospf 10 area 3 stub
B. On all Area 3 routers router ospf 10 area 3 stub
C. On all Area 3 routers router ospf 10 area 3 stub no - summary
D. On the ABR router ospf 10 area 3 nssa
E. On the ABR rou ter ospf 10 area 3 stub no - summary

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5.單項選擇題 The Dev - 1 and Dev -3 routers are OSPF neighbors over the Ethernet 0/0 connection. Based on the show ip ospf neighbor output from the Dev - 1 and Dev - 3 routers, which statement is true?（）

A. Dev - 1 is the DR because it has a lower OSPF router ID
B. Dev - 3 is the DR because it has a higher OSPF router priority
C. Both Dev - 1 and Dev - 3 are using the def ault OSPF router priority
D. Dev - 3 is the DR because it has a lower OSPF router ID
E. Dev - 1 is the DR because it has a higher OSPF router priority

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