单项选择题
A. network unification
B. remote access
C. mobility services
D. network management
多项选择题 Whattwochoicescanyoumakewhenredundancyisrequiredfromabranchofficetoaregional office？（）
单项选择题 YouaretheCiscoNetworkDesignerinCisco.com.WhichoftheseisaLayer2transport architecturethatprovidespacket-basedtransmissionoptimizedfordatabasedonadualringtopology？（）
单项选择题 Whichtypicalenterprisecampusrequirementensuresthatthenetworksupportstherequired applicationsandthatdataflowswithintherequiredtimeframes？（）