单项选择题
A. Utilize Layer 3 switching
B. Utilize software accelerated services
C. Aggregate end users and support a feature-rich environment
D. Perform packet manipulation and filtering at the core layer
E. Use redundant point to-point Layer 2 interconnections when where is a link or node failure.
单项选择题 Thereare3stepstoconfirmwhetherarangeofIPaddresscanbesummarized.Whenofthefollowingisusedineachofthese3steps？（）
多项选择题 WhichtworestrictionsmusttheEnterpriseCampusnetworkdesignerconsiderwhenevaluatingWANconnectivityoptions？（）
单项选择题 WhichtechnologyisanexampleoftheneedforadesignertoclearlydefinefeaturesanddesignedperformancewhendesigningadvancedWANserviceswithaserviceprovider？（）