多项选择题
A. Enter the configuration on router B1.
B. Enter the configuration on router B4.
C. On the same router, enter the Summary - address 10.10.1.0 255.255.255.128 subcommand.
D. On the same router, enter the Area 1 range 10.10.1.0 255.255.255.128 subcommand.
E. On the same ro uter, enter the Area 2 range 10.10.1.0 255.255.255.128 subcommand.
多项选择题 Refer to the exhibit. A company would prefer all Internet - bound OSPF routed traffic to use ISP ABC with ISP DEF as a backup. As the network consultant, what three configuration changes might you make?（）
单项选择题 Which functionality is required within an IP router that is situated at the boundary of an IPv4 network and an IPv6 network to allow communication between IPv6- only and IPv4 - only nodes?（）
单项选择题 Which BGP feature shou ld be used to avoid high memory utilization on a router?（）
