问答题InBGP，wecanuseRouteReflectorandfullmesh.Whyshouldweusethese？
问答题Neitherexternalroutesnorinterarearouteswillinjectintothisarea.Whatistheareatypeandhowcanyouconfigureit？
问答题一个不多于50台主机的网络，合适它的掩码是多少？
问答题whatisadministrativedistance.
问答题InmulticastnetworkhowtoselectDR？andwhatistheorder？
