Which two statements are correct with regard to route distinguisher as defined in RFC 4364-AKA IP-VPN（MPLS-VPN）？（） The configuration to define Route-Distinguisher is Ip vrf bulle Rd 1：1。 A route distinguisher can be imported and exported to and from a VRF。 Route-Distinguisher is an 8 byte BGP attribute value used in influencing BGP best path algorithm.。 Route-Distinguisher is an 8 byte value used in creating unique VPNv4 address.。
220千伏电压等级的输电线路的通道保护区边线外距离是（）。 10米。 15米。 20米。
资本预算指标按其是否考虑货币的时间价值因素可以分为（） 利润率指标。 成本指标。 非贴现现金流量指标。 贴现现金流量指标。
vPath is a critical component in the VNS architecture. Which two are functions of vPath？（） intelligent traffic steering to the VSG。 offloading the processing from the VSG to the VEM。 intelligent traffic steering to the VNMC。 offloading the processing from the VSG to the flow manager。 deep packet inspectio。
概念驱动加工、自上而下的加工
The Company switches have all been upgraded to use VTP version 2. What are two benefits provided in VTP Version 2 that are not available in VTP Version 1？（）
