Which three things can be restricted by the Class of Service in a traditional PBX？ （）

单项选择题Whichofthesestatementsistrueofroutingprotocolsinahub-and-spokeIPsecVPNtopology？（）

A. EIGRP can summarize per interface.
B. OSPF router databases remain independent.
C. When they are configured with stubs， EIGRP regularly floods the topology.
D. OSPF topology decisions are made independent of hierarchy or area.

单项选择题Whendealingwithtransparentcaching，whereshouldtheContentEnginesbeplaced？（）

A. close to the servers
B. close to the end users
C. at the Internet edge
D. in front of web server farms

单项选择题TheVPNterminationfunctionprovidestheabilitytoconnecttwonetworkstogethersecurelyovertheinternet.WhichoftheseistrueofIPaddressingwithregardtoVPNtermination？（）

A. termination devices need routable addresses inside the VPN
B. termination devices need not routable addresses inside the VPN
C. IGP routing protocols will update their routing tables over an IPsec VPN
D. addressing designs need to allow for summarization

多项选择题AcmeCostumeCompanyisconnectingitsmanufacturingfaciltiestoitsstoreswithasmallpoint-to-multipointFrameRelayIPWAN.Littlegrowthisexpectedinthenetworkinfrastructure.Uptothispointthecompanyhasbeenusingadial-on-demandnetwork.DroppingWANcosts，however，haveledthemtoconsiderusingahigh-speedWANsolutiontoimproveaccess.Whichtworoutingprotocolscouldyoudeploytosupportthenewlargernetworkwhilekeepingcostsdown？（）

A. RIP
B. RIPv2
C. EIGRP
D. OSPF

多项选择题YouaretheCiscoNetworkDesignerinCisco.com.WhichoftheseareimportantwhendetermininghowmanyusersaNAScansupport？（）

A. bandwidth
B. number of plug-ins per scan
C. total number of network devices
D. number of checks in each posture assessment