When two bridges are competing for the root bridge of an IEEE 802.1D spanning tree and both have the same bridge priority configured， which parameter determines the winner？（）

单项选择题Forthefollowingitems，whatisthemathematicalrelationshipbetweenthecommittedinformationrate（CIR），committedburst（Bc），andcommittedratemeasurementinterval（Tc）？（）

A.CIR=TC/Bc
B.CIR=Be/Tc
C.Tc=CIR/Bc
D.Tc=Bc/CIR

单项选择题Forthefollowingprotocols，whichoneprovidesamechanismtotransparentlyinterceptandredirectCIFStrafficfromaclienttoalocalCiscoWidaAreaApplicationengine？（）

A.Virtual Router Redundancy Protocol（VRRP）
B.File Transport Protocol（FTP）
C.Hot Standby Routing Protocol（HSRP）
D.Web Cache Communication Protocol（WCCP）

单项选择题Policy-basedroutingallowsnetworkadministratorstoimplementroutingpoliciestoallowordenypathsbasedonallofthesefactorsexceptwhichone？（）

A.End system
B.Protocol
C.Application
D.Throughput

单项选择题PhaseIandPhaseIIDMVPNdifferintermsofwhichofthesecharacteristics？（）

A.Utilization of spoke-to-spoke dynamic tunnels
B.Utilization of multipoint GRE tunnels at the hub site
C.Utilization of hub-to-spoke dynamic tunnels
D.Support for multicast

单项选择题Whichoneofthefollowingpotentialissuesiseliminatedbyusingsplithorizon？（）

A.Joined horizons
B.Packet forwarding loops
C.cisco Express Forwarding load-balancing inconsistency
D.Asymmetric routing throughout the network