单项选择题
A. a request made by a node to join a specified multicast group
B. a request made by a node for its IP address
C. a request made by a node for the IP address of the DHCP server
D. a request made by a node for the IP address of the local router
多项选择题 To enable BGP tunneling over an IPv4 backbone, the IPv4 address 192.168.30.1 is converted into a valid IPv6 address. Which three IPv6 addresses are acceptable formats for the IPv4 address? （）
单项选择题 Refer to the exhibit. Based on the output from the show command on RT1which statement is true? （）
单项选择题 Which statement is true about the command ipv6 ospf 1 area 0?（）