In a collapsed core design， which two benefits are provided by a second-generation Cisco MDS director？ （）

单项选择题WhichpathselectionprotocolisusedbyFibreChannelfabrics？（）

A. IVR
B. VoQ
C. FSPF
D. VSANs
E. SANTap

单项选择题WhichstatementaboutFibreChannelcommunicationsiscorrect？（）

A. It operates much like TCP.
B. Flow control is only provided by QoS.
C. It must be implemented in an arbitrated loop.
D. Communication methods are similar to those of an Ethernet bus.
E. N_Port to N_Port connections use logical node connection points.

多项选择题WhichtwoofthesecorrectlydescribeFibreChannel？（）

A. supports multiple protocols
B. works only in a shared or loop environment
C. allows addressing for up to 4 million nodes
D. allows addressing for up to 8 million nodes
E. provides a high speed transport for SCSI payloads
F. may stretch to a distance of up to 100 km before needing extenders

多项选择题WhichtwostatementsaboutNetworkAttachedStoragearecorrect？（）

A. Data is accessed using NFS or CIFS.
B. Data is accessed at the block level.
C. NAS is referred to as captive storage.
D. Storage devices can be shared between users.
E. A NAS implementation is not as fast as a DAS implementation.

单项选择题Whichstatementaboutdatacenteraccesslayerdesignmodesiscorrect？（）

A. The access layer is the first oversubscription point in a data center design.
B. When using a Layer 2 loop-free design， VLANs are extended into the aggregation layer.
C. When using a Layer 2 looped design， VLANs are not extended into the aggregation layer.
D. When using a Layer 3 design， stateful services requiring Layer 2 connectivity are provisionedfrom the aggregation layer.
E. The data center access layer provides the physical-level connections to the server resourcesand only operates at Layer 3.