<P>Which two of the following are valid characteristics of EIGRP? (Select two answer choices) </P><P>A.Has a maximum hop count of 25 <BR>B.Can differentiate between internal and external routes <BR>C.Uses a 32-bit metric <BR>D.Can maintain only one routing table <BR>E.Need all networks to use the same subnet mask <BR>F.Supports only one routed protocol </P><P>这题如何解啊,有点不明白? 请教cisco高手解释一下,</P><P> </P>