单项选择题 Refer to the exhibit.The actual speed of the serial links between R2 and R3 are 256 kb/s and 512k b/s respectively. When configuring EIGRP on routers R2 and R3, the network administrator configured the bandwidth of both serial interfaces to 512 kb/s. What will be the effect?（）

多项选择题 Refer to the exhibit. When you examine the routing table of R1 and R4, you are not able to see the R1 Ethernet subnet on the R4 routing ta ble. You are also not able to see the R4 Ethernet subnet on the R1 routing table. Which configuration change should be made to resolve this issue? Select the routers where the configuration change will be required, and select the required EIGRP configur ation command(s).（）

单项选择题 Refer to the exhibit. The Route.com company is running EIGRP between all the r outers. Currently, if one of the LAN links (LAN1 or LAN2) at the headquarters flaps (goes up and down), the HQRTR1 and HQ - RTR2 routers will experience high CPU usage and have a long EIGRP convergence time. As the new network administrator, you are asked to investigate this situation and determine if there is a quick way to resolve this issue. Which is the most important thing that you can quickly verify first to resolve this issue?（）