单项选择题 Routers R1 and R2 are EIGRP neighbors using their Fa0/0 interfaces, respectively. An engineer adds the ip hello - interval eigrp 9 6 command to R1s Fa0/0 configuration. Which of the following is true regarding the results from this c hange？（）

单项选择题 Router R1 has working interfaces S0/0, S0/1, and S0/2, with IP address/prefix combinations of 10.10.10.1/24, 10.10.11.2/24, and 10.10.12.3/22. R1s configuration includes the command s router eigrp 9 and network 10.0.0.0. The show ip eigrp interfaces command lists S0/0 and S0/1 in the command output, but not S0/2. Which answer gives the reason for the omission？（）

多项选择题 A router has been configured with the commands router eigrp 9 and network 72.16.1.0 0.0.0.255. No other EIGRP - related commands have been configured. The nswers list the IP addresses that could be assigned to this routers Fa0/0 interface. Which answers list an IP address/prefix length that would cause the router to enable IGRP on Fa0/0?（）