单项选择题
A. DTP
B. RPR
C. SDH
D. CWDM
E. DWDM
单项选择题 OneofyourcustomerswishestousetheNAStoperformDHCPfunctionsanddoesnotcurrently haveaLayer3gatewayinitsproductionnetwork.Whichgatewaymodeisappropriateforthis customer？（）
单项选择题 YourMPLSimplementationiscurrentlyusinginternalbackdoorlinks.Whatcanyoudotominimize theimpactofhavingtheselinks？（）
单项选择题 WhichoftheseistrueofaLayer3out-of-bandNASdeployment？（）