What is the term for a logical SAN which provides isolation among devices physically connected to the same fabric?（）

单项选择题Which statement about Fibre Channel communications is correct?（）

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Which two of these correctly describe Fibre Channel? （）

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 to100 km before needing extenders

多项选择题Which two statements about Network Attached Storage are correct?（）

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.

多项选择题You create a server control that inherits from WebControl. You need to enable the server control to emit markup for a new kind of mobile device. You must not alter the code in the server controls. Which two actions should you perform? （）

A. Create a class that inherits HtmlTextWriter and that can emit the new markup.
B. Create a class that inherits StreamWriter and that can emit the new markup.
C. Reference the class in the <capabilities> element of the new device's browser definition file.
D. Reference the class in the <controlAdapters> element of the new device's browser definition file.

单项选择题Which statement about data center access layer design modes is correct?（）

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 provisioned from the aggregation layer.
E. The data center access layer provides the physical-level connections to the server resources and only operates at Layer 3.