Which statement describes the FIP function of the FCoE Initiation Protocol？ （） [" It is required to establish the point-to-point FCoE links with the first switch in the path."," It is required to establish the point-to-point FCoE links with any switch across multiple Ethernet segments."," It is not used to build the FCoE links."," It is used to ensure lossless transport."]
按《公司油库管理制度》中“穿戴救生衣、安全帽和保险带管理制度”的规定，哪些作业人员必须穿着工作救生衣？
某公司有一投资方案，方案的现金净流量第一年为12000，第二年14000，第三年16000年，第四年18000，第五年20000，初始投资为50000。用非贴现现金流量指标计算该项目的投资回收期为（） ["2年","2.75年","3年","3.44年"]
Which Ethernet field is used to differentiate between the FCoE frame and the FIP frame？（） [" Ethernet FCS"," Source address"," Destination address"," EtherType"," Protocol type"]
对普通硅酸盐熔体，随温度升高，表面张力将（）。 ["降低","升高","不变","A或B"]
dhcp是基于什么协议的？
