单项选择题
A. It is a route to be used when the routing protocol fails.
B. It is a route configured by an ISP that sends traffic into a corporate network.
C. It is a route used when a packet is destined for a remote network that is not listed in the routing table.
D. It is a route manually configured for a specific remote network for which a routing protocol is not configured.
E. It is used to send traffic to a stub network.
多项选择题 Some of the TestKing routers have been configured with default routes. What are some of the advantages of using default routes?（）
单项选择题 How does route poisoning work with holddown timers to prevent routing loops?（）
单项选择题 What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is inactive status?（）