单项选择题
Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?（）
A. IETF B. HDLC C. Q9333-A Annex A D. ANSI Annex D
单项选择题 What is the default administrative distance of OSPF?（）
单项选择题 Which address is the IPV6 all-RIP-routers muticast group address that is used by RIPng as the destaion address?（）
单项选择题 Which statement is true, as relates to classful or classless routing?（）
