（20) Catalyst 3500（Cisco IOS系统）中启用STP的命令格式是（)。A)

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  A . when a packet is received from an 802.1Q trunk，the vlan id can be determined from the source MAC address table B . unkown unicast frames are retransmitted only to the ports that belong to the same vlan C . ports between switches should be configured in access mode so that vlans can span across the ports D . broadcast and multicast frames are retransmitted to ports that are configured on different vla

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• Which two of these Cisco Catalyst are distribution-area switches？ （）

  A .  Catalyst 2800/E Series B .  Catalyst 3750 Series C .  Catalyst 3900/E Series D .  Catalyst 4500/E Series E .  Catalyst 6500/E Serie

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• 下列哪项关于Cisco Catalyst交换机VLAN操作是正确的？（）

  A . 当从一个802.1Q中继收到一个包时，VLAN ID可以从源MAC地址表确定 B . 未知单播帧被重新传输只对属于同一VLAN的端口 C . 交换机之间的端口应该在接入模式被配置为使得VLAN可以横跨端口跨越 D . 广播和多播帧被重发到在不同的VLAN配置的端口

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• A customer is considering purchasing either a Cisco Catalyst 2960 or Cisco Catalyst Express 500. Which feature can only be found on the Catalyst 2960？（）  

  A .  48 Ethernet 10/100 ports B .  Fast Ethernet and Gigabit Ethernet connectivity C .  dual-purpose copper or fiber uplinks D .  standalone fixed-configuration Layer 2 switching

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• 在Cisco Catalyst交换机上使用命令show-mac-address-table可以找到哪些信息（）。

  A . Catalyst交换机mac地址 B . 连接到交换机端口的主机的MAC地址 C . 直接相连的网络设备的IP地址 D . 网络主机的MAC地址与IP地址之间的映射关系

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• Which statement correctly describes network security settings in Cisco Network Assistant for the Catalyst Express 500 Switch？（）

  A . The LOW setting enables broadcast storm control， but has no effect on the number of devices that can connect to a switch port B . The LOW setting enables broadcast storm control and limits the number of devices that can connect to a switch port. C . The LOW setting disables broadcast storm control but limits the number of devices that can connect to a switch port D . The default network setting is "HIGH&quot

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• Which two characteristics apply to Cisco Catalyst 6500 Series Switch supervisor redundancy  using NSF？（）

  A .  independent of SSO B .  NSF combined with SSO enables supervisor engine load balancing C .  supported by RIPv2， OSPF， IS-IS， and EIGRP D .  supports IPv4 and IPv6 multicast E .  prevents route flapping F .  dependent on FIB table

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• 查看Cisco Catalyst交换机的版本信息可以使用（）命令。

  A . show version B . show running-config C . show hostname D . show cdp neighbor

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• A Cisco Catalyst switch can belong to how many VTP domains？ （）

  A .  1 B .  2 C .  1 to 1，005 D .  1 to 4，096 E .  no limit

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• For which of the following campus LAN Areas is the Cisco Catalyst 500 Series switch most suitable?（）

  A . Access Area B . Backbone Area C . Core Area D . Distribution Area

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• 在Cisco Catalyst2 950交换机上用enable password命令设置了使能口令cisco，用enable secret命令设置了使能密码ciscolab。在进入特权命令模式时，应输入的密码为（）。

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

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• Cisco的Catalyst5500交换机支持（）。

  A . 成组交换式100BaseTX以太网 B . ATMOC-48 C . FDDI D . T1/E1

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• 在建立与Cisco Catalyst交换机的控制台连接的时候，根据连接的方法不同，下列（）是有效的电缆类型。

  A . 交叉电缆 B . 反转电缆 C . 直通电缆 D . 调制解调器电缆 E . 以上都正确

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• 默认情况下，Catalyst 6500的所有端口都是第3层路由端口，并且处于“管理性关闭”状态，如下能够启用该接口的Cisco命令是（）。

  A . no shutdown B . link-up C . switchport mode access D . no switchport mode shutdow

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• The Cisco Catalyst Express 500 Series Switch is targeted for businesses with how many users?（）

  A . 501 to 1000 Users B . 20 to 250 Users C . More than 1000 Users D . 251 to 300 User

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• 对于Cisco Catalyst 1900交换机来说10Mbps TX端口的设置全双工模式是（）。

  A . auto B . full C . half D . full-flow-control

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• Which statement about vlan operation on cisco catalyst switches is true?（）

  A . when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MAC address table. B . unkown unicast frames are retransmitted only to the ports that belong to the same vlan C . ports between switches should be configured in access mode so that vlans can span across the ports D . broadcast and multicast frames are retransmitted to ports that are configured on different vlan.

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• What form of AutoQoS is supported on Cisco Catalyst 2950 switches with the Enhanced Image？（）

  A . AutoQos Enterprise B . AutoQoS Campus C . AutoQoS VoIP D . AutoQoS LAN

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• What is the difference between Cisco Catalyst 2960 LAN Base Series and Cisco Catalyst 2960 LAN Lite Series？（）  

  A .  Only the Cisco Catalyst 2960 LAN Base Series offers enhanced Layer 2+ intelligent LAN services. B .  Only the Cisco Catalyst 2960 LAN Lite Series supports Power over Ethernet. C .  Only the Cisco Catalyst 2960 LAN Base Series can be managed by Cisco Network Assistant. D .  Only the Cisco Catalyst 2960 LAN Lite Series supports Gigabit Ethernet uplink

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• Cisco Catalyst_switches fit in the access area.（）

  A .  1600，7300 and 8000 Series B .  2900，3700 and 4500 Series C .  2700，7300 and 8000 Series D .  2700，3700 and 4500 Serie

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• What is the function of the command switchport trunk native vlan 999 on a Cisco Catalyst switch?（）

  A . It creates a VLAN 999 interface. B . It designates VLAN 999 for untagged traffic. C . It blocks VLAN 999 traffic from passing on the trunk. D . It designates VLAN 999 as the default for all unknown tagged traffic.

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• A Cisco 4404 WLAN controller is being connected to a Cisco 6500 Catalyst Series Switch. How would younterconnect and configure LAG for connectivity and ensure redundancy？（）

  A . All four ports from the Cisco WLC terminated to the same Catalyst gigabit module and channel group. B . All four ports from the Cisco WLC terminated to the same Catalyst gigabit module using two channel groups. C . Ports 1 and 2 from Cisco WLC to Catalyst gigabit module slot 1 channel group 20 and Cisco WLC ports3 and 4 to Catalyst gigabit module slot 2 channel group 40. D . Ports 1 and 2 from Cisco WLC to Catalyst gigabit module slot 1 channel group 10 and Cisco WLC ports3 and 4 to Catalyst gigabit module slot 2 channel group 10.

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• Which Cisco Catalyst switches fit in the access area？（）

  A .  Cisco Catalyst 2900 Series，Catalyst 7300 Series，and Catalyst 8000 Series B .  Cisco Catalyst 2900 Series，Catalyst 3700 Series，and Catalyst Series C .  Cisco Catalyst 2700 Series，Catalyst 7300 Series，and Catalyst 8000 Series D .  Cisco Catalyst 2700 Series，Catalyst 3700 Series，and Catalyst4500 Serie

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• Which two characteristics apply to Cisco Catalyst 6500 Series Switch supervisor redundancyusing NSF？（）

  A . independent of SSO B . NSF combined with SSO enables supervisor engine load balancing C . supported by RIPv2， OSPF， IS-IS， and EIGRP D . supports IPv4 and IPv6 multicast E . prevents route flapping F . dependent on FIB table

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