单项选择题
A. To configure a route to the first Layer 3 device on the network segment.
B. To configure a route from an ISP router into a corporate network.
C. To configure a route when the administrative distance of the current routing protocolis too low.
D. To reach a network is more than 15 hops away.
E. To provide access to the Internet for enterprise hosts.
单项选择题 Which command will configure a default route on a router?（）
单项选择题 You work as a network engineer at TestKing.com. You are required to allow establishment of a Telnet session with a router TestKingC.Which set command must be configured?（）
多项选择题 You are a technician at TestKing. Your newly appointed TestKing trainee wants to know what the CDP is.What would your reply be?（）