Which two QoS classification and marking statements are true？ （） In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit.。 In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field.。 In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values.。 The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet.。 The 802.1Q standard uses a three bit field referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.。
挥发组份作用
太阳的体积是地球的130万倍。外部太阳大气的底层称为（）。
EIGRP uses five generic packet types （hello， updates， queries， replies， acknowledgements）. If youwished to view the statistics for these packets， which IOS command should you use？（） debug eigrp packets。 show ip eigrp traffic。 show ip eigrp topology。 show ip eigrp neighbor。
变压器铁损是指变压器的空载损耗，它主要取决于（）的变化。 电压和频率。 负载。 电流。 电压。
关于HBV-DNA的描述哪项是正确的（）
