具有3个结点的二叉树有( )。
A、2种形态
B、4种形态
C、7种形态
D、5种形态
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
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.
()、()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