Lossless Ethernet for FCoE is achieved through the use of which features？（）

单项选择题WhichstatementistrueaboutTheQoSClassFibreChannel？（）

A. Cannot be disabled
B. Cannot have the CoS changed
C. Can have "Packet Drop" enabled
D. Is multicast optimized
E. Can have the MTU changed

单项选择题WhenbuildingaNICteam（virtualportchannel）betweenahostandapairofCiscoNexus5000SeriesSwitchesthatwillcarryFCoEtraffic，whatisthemaximumnumberofphysicallinksthatcanexistintheteam？（）

A. 1
B. 2
C. 4
D. 5
E. 16

单项选择题WhichstatementiscorrectaboutthenumberofavailableQoSsystemclassesinFCoE？（）

A. It’s hard-set and cannot be disabled
B. It’s configurable， with an upper limit of 16
C. It’s hard-set but cannot disable best-effort and Fibre Channel
D. It’s hard-set but can disable all but one class
E. It’s configurable with an upper limit of eight

单项选择题WhichmechanismdotheCNAandtheCiscoNexus5000SeriesSwitchesusetoprovidealosslessclassofEthernettraffic？（）

A. LLDP
B. LACP
C. PFC
D. FIP

单项选择题Which statement describes the below output from an MDS switch？（）    Flow ID. 44  Initiator VSAN： 200  Initiator WWN： 50：06：04：8a：cc：19：12：db  Target VSAN： 200  Target WWN： 50：06：04：8c：de：ad：be：ef  T arget LUN： ALL LUNs  Flow Verification Status：   -------------------------  Initiator Verification Status： success  Target Verification Status： WWN was not found in name server   Initiator Linecard Status： success  Target Linecard Status： Status not yet checked   Feature Status：   ---------------  Write-Acceleration enabled   Write-Acceleration Buffers： 1024  Configuration Status： flow verification failed

A. The zone containing both the initiator and target does not exist
B. The zone set has not been activated
C. The target is not logged into the fabric
D. The pWWN used for the target is invalid