单项选择题 Refer to the exhibit. Router RTA has been configured as a DHCP server. The two debug commands will generate output on RTA when Ho st A requests an IP address. Which set of DHCPD debug messages is in the correct sequence?（）

多项选择题 Which two statements are true about IS -IS routing?（）

多项选择题 Refer to the exhibit. A network administrator has configured DHCP services on the router asshown. DHCP clients connected to the FastEthernet0/0 interface are working properly. DHCP clients connected to the FastEthernet0/1 interface are not receiving addresses. Which two statements contain recommendations that will solve the problem?（）