单项选择题
A.Apply an export policy in RIP
B.Apply an import policy in RIP
C.Apply an export policy in OSPF
D.Apply an import policy in OSPF
单项选择题 AnOSPFnon-backboneareafollowsexternalroutestobefloodedwithinthearea.Theseexternalroutesarepropagatedintootherareas.However，externalroutesfromotherareasarenotallowedtoenterthisarea.WhichtypeofOSPFareadoesthisdescribe？（）
单项选择题 InJUNOSsoftware，whichcommandisusedtoconfigureTEDsupportforOSPF？（）
单项选择题 Whatisrequiredtoenabletheuseofmetricslargerthan63fortrafficengineeringinIS-IS？（）