In an L2TP voluntary tunneling scenario， the VPDN tunnel is terminated between：（） [" The client and the NAS."," The NAS andthe LNS."," The NAS and the LAC."," The client and the LNS."]
关于单板替代关系下面描述正确的有（） ["RWF可以替代TWF使用","TWF可以替代RWF使用","M32可以替代D32使用","D32可以替代M32使用"]
what is the purpose of frame-relay LMI？
Which three statements best describe multicast operation on Cisco Nexus switches in a data center？（） [" Cisco NX-OS Software does not support PIM dense mode."," The command ip multicast-routing must be enabled in Cisco NX-OS Software before any multicast configuration is possible on the switch."," PIM CLI configuration and verification commands are not available until you enable the PIM feature with the feature pim command."," Cisco NX-OS Software supports multicast routing per Layer 3 VRF instance."," The default PIM operational mode on the Cisco Nexus 7000 switch is SSM."]
一般式气缸体
吸收衰减特点。
