单项选择题
One of your customers wishes to use the NAS to perform DHCP functions and does not currently have a Layer 3 gateway in its production network. Which gateway mode is appropriate for this customer？（）
A. Virtual Gateway B. Real-IP Gateway C. NAT Gateway D. IP-IP Gateway
单项选择题 YourMPLSimplementationiscurrentlyusinginternalbackdoorlinks.Whatcanyoudotominimize theimpactofhavingtheselinks？（）
单项选择题 WhichoftheseistrueofaLayer3out-of-bandNASdeployment？（）
多项选择题 WhichthreeoftheseareimportantwhendeterminingNASServerscaling？（）
