What are three common reasons for ATM CRC errors？（） Incorrect VPI and VCI configuration。 Noise， gain hits， or other transmission problems on the data link equipment。 ATM cells are dropped due to incorrect ATM routing in the service provider.。 A faulty or failing ATM interface.。 Cells are dropped due to traffic policing in the ATM cloud on one or more virtual circuits attached to theATM interface。
Which statement about access lists that are applied to an interface is true?（） you can apply multiple access lists with the same protocol or in different direction.。 you can config one access list,per direction,per layer 3 protocol。 you can place as many access lists as you want on any interface。 you can apply only one access list on any interface。
游戏性体验
What are two QoS mechanisms that are used to prevent packet loss？（） header compression。 payload compression。 low latency queuing （LLQ）。 weighted random early detection （WRED）。 traffic policing。 traffic shaping。
最强的有机酸是（） 甲酸。 乙酸。 丙酸。 丁酸。
人文主义思想的实质是（）。
