多项选择题 Which characteristics are representative of a link-state routing protocol?（）

单项选择题 What is the default administrative distance of OSPF?（）

单项选择题 Refer to the exhibit. A network administrator configures a new router and enters the copy startup-config running-config on the router. The network administrator powers down the router and sets it up at a remote location. When the router starts, it enter the system configuration dialog as shown. What is the caust of the problem?（）