单项选择题 Refer to the above exhibit. Why are the EIGRP neighbors for this router not learning the routes redistributed from OSPF?（）

单项选择题 Refer to the above exhibit. Why is the 140.140.0.0 network not used as the gateway of last resort even though it is configured first?（）

单项选择题 Your network consists of a large hub - and - spoke Frame Relay network with a CIR of 56 kb/s foreach spoke. Which statement about the selection of a dynamic protocol is true?（）