交换机命令Switch＞enable的作用是()。

A .  changing the default policy map from a default MTU of 1500 to 9216 B .  using the command system jumbomtu 9216 C .  using the command interface MTU 9216 D .  configuring the default Ethernet system class to an MTU of 9216 with a new network QoS policy ma

A . 采用口令"cisco"来保护控制台端口 B . 通过将可用的线路数指定为0来拒绝用户访问控制台端口 C . 通过提供所需的口令来访问线路配置模式 D . 配置用于远程访问的特权执行口令

A .  Enables all fiber-optic LAN ports for Unidirectional LINK Detection （UDLD） B .  Enables all copper media LAN ports Unidirectional Link Detection （UDLD） C .  Overrides the default UDLS setting for all ports D .  Globally enables all ports on the device for Unidirectional Link Detection （UDLS） E .  None of the other alternatives apply

A . The default CoS value for incoming traffic is set up to 0. B . The CoS value is trusted for 802.1p or 802.1q tagged traffic. C . PortFast is automatically disabled when a voice VLAN is configured. D . The voice VLAN feature is disabled by default. E . The IP phone accepts the priority of all tagged and untagged traffic and sets the CoS value to 4. F . When the voice VLAN feature is enabled， all untagged traffic is sent according to the default  CoS priority of the port

A . port-based RADIUS B . 802.1q trunking C . inline power D . protected port

A .  VTP mode B .  STP root status C .  Negotiation status D .  Management domain E .  Configuration revision number

A . aaa port-auth enable B . radius port-control enable C . dot1x system-auth-control D . switchport aaa-control enable

A . stp enable用来启动交换机的STP功能，缺省情况下，交换机上的STP功能处于启用状态 B . 缺省情况下，华为交换机的运行模式为传统STP模式 C . stp priority命令用来配置交换机的优先级，缺省情况下，交换机优先级取值为32768 D . 交换机的优先级，取值范围为0～61440，步长为4096，即交换机可以设置16个优先级取值，如0、4096、8192等

A . cisco B . ciscolab C . enable D . secret

A . DHCP requests will be switched in the software， which may result in lengthy response times. B . The switch will run out of ACL hardware resources. C . All DHCP requests will pass through the switch untested. D . The DHCP server reply will be dropped and the client will not be able to obtain an IP address.

A . The CoS is trusted for 802.1P or 802.1Q tagged traffic. B . PortFast is disabled on the port. C . Port Security is automatically enabled on a voice VLAN port. D . Untagged traffic is sent according to the default CoS priority of the port. E . None of the other alternatives apply

A . The denied MAC addresses have already been learned or confgured on another secure interface in the same VLAN. B . The denied MAC address are statically configured on the port. C . The minimum MAC threshold has been reached. D . The absolute aging times for the denied MAC addresses have expired.

A . 将该端口关闭 B . 将该端口配置为二层交换端口 C . 将该端口配置为三层路由端口 D . 将该端口配置为Trunk端口

A . port-based radius B . 802.1q trunking C . inline power D . protected port

A . 创建编号为3的VLAN，并命名为vlan3 B . 把名称为vlan3的主机划归编号为3的VLAN C . 把名称为vlan3的端口划归编号为3的VLAN D . 进入vlan3配置子模式

A .  CompanySwitch（config-if）#switchport trunk encapsulation dot1q B .  CompanySwitch（config-if）#switchport trunk encapsulation itef C .  CompanySwitch（config-if）#switchport trunk encapsulation fddi D .  CompanySwitch（config-if）#switchport trunk encapsulation isl E .  None of the other alternatives apply

A．IP地址 B．MAC地址 C．LLC地址 D．PORT地址

A．connect B．confnrm C．control D．config

A．显示使用SSH连接的主机 B．断开使用SSH连接的主机 C．创建公钥和私钥密钥对 D．显示交换机上激活的SSH端口 E．访问SSH数据库配置

A．connect B．control C．configure D．confirm

Switch02(config)interface f0/24 (进入端口1配置模式) Switch02(config-if) (9) Switch02(config-if) (10) (设置允许从该端口交换数据的VLAN)

A．百兆以太口 B．千兆以太口 C．1394 口 D．Console口