[单选]

Two Company switches are connected via a trunk link. In this network， the original frame is  encapsulated and an additional header is added before the frame is carried over a trunk link. At  the receiving end， the header is removed and the frame is forwarded to the assigned VLAN. 
This  describes which technology？（）

创业成功的基本条件不包括（）。 资源。 渠道。 创新能力。 出身背景。 发展党员，必须把（）放在首位，经过党的支部，坚持（）的原则。 Your company has an Active Directory Domain Services (AD DS) domain. All servers run Windows Server 2008 R2. You provide access to some applications through a virtual desktop infrastructure (VDI) environment. All virtual desktop computers are located in an organizational unit (OU) named VirtualDesktops . All other client computer objects are located in an OU named Desktops. Many users experience long logon times when logging into virtual desktop computers due to large roaming profiles. You need to reduce the user logon times for virtual desktop computers. What should you do?（） On each virtual desktop computer, set a disk quota on the system drive.。 On each client computer, set the temporary folders option to not use session-specific temporary folders.。 Create a Group Policy object (GPO) that enables folder redirection for all users. Enable loopback processing, and link the GPO to the VirtualDesktops OU.。 Create a Group Policy object (GPO) that enables folder redirection for all users. Enable slow link detection, and link the GPO to the VirtualDesktops OU.。 Your company has a server named VS1 that runs Windows Server 2008 and Microsoft Hyper-V. VS1 hosts 10 virtual machines.  You need to configure VS1 to shut down each virtual machine before the server shuts down. What should you do？（） Create a shutdown script on each virtual machine.。 Install Integration Services on each virtual machine.。 Enable the Turn off the virtual machine option in the Automatic stop action properties on each virtual machine.。 Enable the Shut down the guest operating system option in the Automatic stop action properties on each virtual machine.。 申请护士执业注册者，应当在综合医院完成护理临床实习（）时间

Two Company switches are connected via a trunk link. In this network， the original frame is  encapsulated and an additional header is added before the frame is carried over a trunk link. At  the receiving end， the header is removed and the frame is forwarded to the assigned VLAN. 
This  describes which technology？（）