CCIE系列認(rèn)證單項選擇題每日一練(2019.07.27)

來源：考試資料網(wǎng)

1 You use OSPF as your network routing protocol. You use the command show ip route and you see several routes described as O， O IA， O E1， and O E2. What routes are in your area？（）

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2 Multi Protocol Label Switching （MPLS） is a data-carrying mechanism that belongs to the family of packet-switched networks. For an MPLS label，if the stack bit is set to1，which option is true？（）

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3 Which configuration prevents traffic that is sourced from the unique local address scope to be sent out ofthe link to the upstream service provider？（）

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4 Which of the following statements is correct regarding a hybridcrypto system？（）

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5 In optical transmission systems， chirped lasers are used for the purpose of：（）.

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