单项选择题
A. NBAR examines data in Layers 1 and 4.
B. NBAR examines data in Layers 3 and 4.
C. NetFlow examines data in Layers 3 and 4.
D. NBAR examines data in Layers 2 through 4.
多项选择题 Usersofasite-to-siteVPNarereportingperformanceproblems.TheVPNconnectionemploysIPSecandGREandtraversesseveralEthernetsegments.TheVPNpacketsarebeing fragmentedastheytraversethelinks.Whatwouldbetwomethodstoovercomethisproblem？（）
单项选择题 YouaretheCiscoNetworkDesignerinCisco.com.Whichofthesestatementsistrueofclientlessend-userdevices？（）
多项选择题 WhataretwodesignguidelinesforVoIPnetworks？（）