单项选择题
A. R1 has been configured with an ip default- network 2.0.0.0 command.
B. R1 has been configured with an ip route 0.0.0.0 0.0.0.0 1.1.1.1 command.
C. R1 has been configured with an ip route 2.0.0.0 255.0.0.0 1.1.1.1 command.
D. Another router has been configured with an ip default - network 2.0.0.0 command.
E. Another router has been configured with an ip route 2.0.0.0 255.0.0.0 1.1.1.1 command.
多项选择题 In a lab, R1 connects to R2, which connects to R3. R1 and R2 each have several working interfaces, all assigned addresses in class A network 10.0.0.0. Router R3 has some working interfaces in class A net work 10.0.0.0, and others in class B network 172.16.0.0. The engineer experiments with the auto -summary command on R2 and R3, enabling and disabling the command in various combinations. Which of the following combinations will result in R1 seeing a rout e for 172.16.0.0/16, instead of the individual subnets of class B network 172.16.0.0?（）
单项选择题 R1 has 5 working interfaces, with EIGRP neighbors existing off each interface. R1 has routes for subnets 10.1.1.0/24, 10.1.2.0/24, and 10.1.3.0/24, with EIGRP integer metrics of roughly 1 million, 2 million, a nd 3 million, respectively. An engineer then adds the ip summary - address eigrp 1 10.1.0.0 255.255.0.0 command to interface Fa0/0. Which of the following is true?（）
单项选择题 An engineer plans to configure summary routes with the ip summary - address eigrp asn prefix mask command. Which of the following, when added to such a command, would create a summary that includes all four of the following subnets: 10.1.100.0/25, 10.1.101.96/27, 10.1.101.224/28, and 10.1.100.128.25?（）