单项选择题
On point-to-point networks, OSPF hello packets are addressed to which address?（）
A.127.0.0.1 B.172.16.0.1 C.192.168.0.5 D.223.0.0.1 E.224.0.0.5 F.254.255.255.255
多项选择题 Which of the following IP addresses can be assigned to host devices?（）
多项选择题 Which of the following are VLAN frame encapsulation types that may be configured on a Catalyst switch?（）
单项选择题 Which statement describes a spanning-tree network that has converged?（）
