单项选择题
To securely transport EIGRP traffic， a network administrator will build VPNs between sites. Whatis the best method to accomplish the transport of EIGRP traffic？（）
A. IPSec in tunnel mode
B. IPSec in transport mode
C. GRE with IPSec in transport mode
D. GRE with IPSec in tunnel mode
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It’saconfigurationthatexpertsarecallinga"firewallsandwich，"withthesecondfirewallprovidingasecondlevelofloadbalancingaftertrafficdown.Whatismeantbytheterm"firewallsandwich"？（）
A. single layer of firewalling
B. multiple layers of firewalling
C. firewall connections in either an active or standby state
D. an architecture in which all traffic between firewalls goes through application-specific servers -
单项选择题
LafeyetteProductionsislookingforanewISPthathasimprovedavailability，load balancing，andcatastropheprotection.WhichtypeofISPconnectivitysolutionwouldbebest？（）
A. single run
B. multi-homed
C. stub domain EBGP
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单项选择题
YouaretheCiscoNetworkDesignerinCisco.com.WhichstatementiscorrectregardingNBARandNetFlow？（）
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.
