单项选择题
A. Enhanced Image
B. StandardImag
C. Cisco IOS software
D. Enhanced Multilayer Software Image
单项选择题 Whichtypeofsecuritywillallowbusinessestofocusonachievingbusinessgoals？（）
单项选择题 WhichprogramisfoundinTrainingandEventscontainsinformationaboutcertificationandadditionalCiscoeducationalresourcesthatenableyoutofurtheryourprofessionalopportunities？（）
多项选择题 InaCiscoSDN，everyelementinthenetworkactsasapointofdefense.WhichtwobestdescribethefeaturesofCiscoSDN？（）