Which two statements about the Adaptive Services PIC are true? （）
AThe Adaptive Services PIC supports the Layer 3 service package by default.
BThe Adaptive Services PIC is required when using the secure shell to access an M-series router.
CThe Adaptive Services PIC can be configured for the Layer 2 and Layer 3 service packages simultaneously.
DThe Adaptive Services PIC can be configured for either the Layer 2 or the Layer 3 service package but not both at the same time.
在路由器上从下面哪个模式可以进行接口配置模式（）。
A、用户模式
B、特权模式
C、全局配置模式
D、安全模式
A customer with an EMC Clariion CX700 storage installation is considering a new IBM TotalStorage DS4500 solution. Which of the following is an advantage of the IBM DS4500 solution？（）
A、Host port speed of 2Gb/s
B、Three-year hardware warranty
C、Heterogeneous Operating System support
D、Storage Manager software comes standard with DS4000 controllers
（）、（）是计算机系统软件的两个重要特点。
What are two ways to create a rescue configuration on a J-series router?（）
AUse the J-Web System > Rescue menu.
BUse the J-Web Configuration > Rescue menu.
CIssue the configure rescue save command.
DIssue the request system configuration rescue save command.
模拟信号的数字化需要三个步骤，下列（）不属于其中。
A、量化
B、编码
C、调制
D、抽样