Refer to the exhibit. This exhibit shows the NAT configuration for Router A and the output for a ping issued from device 171.68.200.48 and destined to 172.16.47.142. Based on this information, what change must be made to Router A in order for the ping to work?（） reload the router。 clear the route cache。 add a static route。 configure IP as classless。 load a newer IOS image。
半逆流型永磁筒式磁选机，槽底的吹散水管的用途是（）。 吹散矿浆。 冲卸精矿。 提高精矿品位。 调节矿浆浓度。
限制RS-232C串行接口标准的传输距离和传输速率的关键因素是由于该标准规定（） 信号源内阻为几百欧。 允许电容负载为2500pF。 其信息格式中包含起始位、停止位及校验位。 采用公共地线。
While deploying a new switch， you accidently connect ports 3/12 and 3/18 together， creating a loop. STP detected it and placed port 3/18 in blocking mode. Why did STP not place port 3/12 in blocking mode instead？（） Port 3/12 was already up and forwarding before the loop was created.。 Port priority is based on lowest priority and lowest port number.。 You connected the wire on port 3/18 last.。 None of the above， it is purely random.。
国际贸易术语
For a router connected to two ISPs for redundancy， using IPSLA and static routing， how would youconfigure uRPF on the uplink interface？（）
