CCIE系列認(rèn)證CCIE 415Q單項(xiàng)選擇題每日一練(2019.01.23)

來源：考試資料網(wǎng)

1 In Frame Relay， FECN messages indicating congestion are sent or received by which of following？（）

2 You are the network administrator of a Layer 3 switched network. Users in one VLAN are complaining that access to the server VLAN is very slow from time to time. Traffic in the local VLAN works without any issue， and users in other VLANs do not have any complaint to reach the server VLAN. What is most likely the cause of this issue？（）

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3 A branch router is configured with an egress QoS policy that was designed for a total number of 10 concurrent VOIP Calls. Due to Expansion， 15 VOIP Calls are now running over the link， but after the 14th call was established， all calls were affected and the voice quality was dramatically degraded. Assuming that there is enough bandwidth on the link for all of this traffic， which part of the QOS configuration should be updated due to the new traffic profile？（）

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4 Which statement is correct about an OSPF sham-link？（）

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5 Which statement is correct in reference to IPv6 multicast？（）

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