使用单臂路由技术实现VLAN间的互访，下面哪一条命令可以正确为VLAN5定义一个子接口？（） A: Router(config-if)encapsulation dot1Q 5 B: Router(config-if)encapsulation dot1Q vlan 5 C: Router(config-subif)encapsulation dot1Q 5 D: Router(config-subif)encapsulation dot1Q vlan 5

Which of these is not a fundamental features of OOP A: Encapsulation B: Inheritance C: Instantiation D: Polymorphism

Which of the following is NOT one of the 3 characteristics of object-oriented programming? A: extensibility B: inheritance C: encapsulation D: polymorphism

Which of the following can be the consequences of necrosis? A: Lysis and absorption B: Isolation and elimination C: Organization D: Encapsulation and Calcification

Object-oriented programming allows you to derive new classes from existing classes. This is called ____________. A: encapsulation B: inheritance C: abstraction D: generalization

______ is a property of object—oriented software by which an abstract operation may be performed in different ways in different classes． A: Method B: Polymorphism C: Inheritance D: Encapsulation

配置单臂路由过程中，下列那条命令是不必要的？ A: interface fastEthernet B: no shutdown C: encapsulation dot1Q D: vlan database

Cisco模拟器中将三层交换机的端口配置为Trunk端口类型的命令（ ） A: Switch(config-if) B: switchport trunk encapsulation dot1qSwitch(config-if) C: switchport mode trunk D: Switch(config-if) E: switchport mode trunk F: Switch(config) G: switchport mode trunk H: Switch(config-if) I: switchport mode trunkSwitch(config-if) J: switchport trunk encapsulation dot1q

在每一层给PDU（协议数据单元）添加相应层控制信息的行为被称为（ ） A: 地址解析 B: 封装（encapsulation） C: 测试

encapsulation dot1Q 10 native 路由器子接口命令中的数字 10 是什么含义？ A: 接口编号 B: 子接口编号 C: 子网编号 D: VLAN ID