[单选] You need to call an unmanaged function from your managed code by using platform invoke services. What should you do？（）

塑性指数 外墙外保温在使用中也屡屡发生（）等情况，甚至保温层脱落、饰面砖脱落等质量通病。 易燃、开裂、渗水。 易燃、不耐热、空鼓。 开裂、不保温、渗水。 开裂、空鼓、渗水。 You have a server that runs Windows Server 2008.You create a new quota template. You apply quotas to 100 folders by using the quota template. You need to modify the quota settings for all 100 folders. You must achieve this goal by using the minimum amount of administrative effort. What should you do？ （） Modify the quota template.。 Delete and recreate the quota template.。 Create a new quota template. Modify the quota for each folder.。 Create a file screen template. Apply the file screen template to the root of the volume that contains the folders.。 You work as a network technician. Your boss is interested in the QoS technology in the context ofvideo traffic. What can be said of application of this technology in this type of network？（） The access layer is the initial point at which traffic enters the network. Traffic is marked （orremarked） at Layers 2 and 3 by the access switch as it enters the network， or is "trusted" that it isentering the network with the appropriate tag。 No traffic marking occurs at the core layer. Layer 2/3 QoS tags are trusted from distributionlayer switches and used to prioritize and queue the traffic as it traverses the core。 Traffic inbound from the access layer to the distribution layer can be trusted or reset dependingupon the ability of the access layer switches. Priority access into the core is provided based onLayer 3 QoS tags。 IP precedence， DSCP， QoS group， IP address， and ingress interface are Layer 2 characteristics that are set by the access layer as it passes traffic to the distribution layer. Thedistribution layer， once it has made a switching decision to the core layer， strips these off。 MAC address， Multiprotocol Label Switching （MPLS）； the ATM cell loss priority （CLP） bit， theFrame Relay discard eligible （DE） bit， and ingress interface are established by the voicesubmodule （distribution layer） as traffic passes to the core layer。 The distribution layer inspects a frame to see if it has exceeded a predefined rate of trafficwithin a certain time frame， which is typically a fixed number internal to the switch. If a frame isdetermined to be in excess of the predefined rate limit， the CoS value can be marked up in a waythat results in the packet being dropped。 刘易斯拐点 You need to call an unmanaged function from your managed code by using platform invoke services. What should you do？（）