区间双线时速在106km/h--200km/h范围时，线间最小距离为（）m。 4。 4.2。 4.4。 5。
臭曲
Which three protocols should be explicitly managed by using a CoPP policy on an Internet border router？（） SMTP。 ICMP。 BGP。 SSH。 RTP。 BitTorrent。 VTP。
Refer to exhibits 1 and 2. In exhibit 1， all users on the LAN segment use router A as the active HSRP router. Router B is the standby router for the HSRP. In exhibit 2， the network management team reported that there is no utilization on the WAN link B. To solve this problem， you decide to change the logical topology of your LAN， but you are not sure about what changes must be made. You must manage HSRP or change it to another protocol in order to provide the most scalable design， automatic redundancy， and load balancing. Which one of these actions would be the best choice？ （） Use MHSRP， with three users using router A as the default gateway and three users using router B as the default gateway.。 Keep HSRP and activate PBR to redirect half of the traffic to the other WAN link.。 Use the backup interface on the WAN link B to provide load balancing for all users.。 Use GLBP instead， because it provides you with up to three MAC addresses for the same default gateway virtual IP address.。 Use GLBP instead， because it provides you with up to four MAC addresses for the same default gateway virtual IP address.。
变矩器效率下降的原因是（） 变矩器供油不足。 油路系统中存在气泡。 油温过高或过低。 以上均正确。
铁路运输国际邮政公物包裹每件不超过（）
