CCIE系列認(rèn)證CCIE 415Q單項(xiàng)選擇題每日一練(2019.01.18)

來源：考試資料網(wǎng)

1 Which one of the following potential issues is eliminated by using split horizon？（）

2 After applying a new ACL on a device， its CPU utilization rose significantly and many messages starting with "%SEC-6-IPACCESSLOG" appeared on the Syslog server. What can be done to resolve this situation？（）

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3 While you are troubleshooting network performance issues， you notice that a switch is periodically flooding all unicast traffic. Further investigation reveals that periodically the switch is also having spikes in CPU utilization， causing the MAC address table to be flushed and relearned. What is the most likely cause of this issue？（）

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4 Which feature would prevent guest users from gaining network access by unplugging an IP phone and connecting a laptop computer？（）

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5 Which statement best describes OSPF external LSAs （type 5）？（）

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