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[主观题]

一件可能使人感到吃惊的事实是，目前不但世界粮食产量的增长速度超过了人口的增长速度，而且同世界

上人均收入的增长速度相比，粮食增长速度也是较快的，甚至其他商品价格的增长速度也比不上粮食的增长速度。尽管如此，今天在全世界仍有很多人口得不到充足的粮食。据估计，由于缺粮而面临饥饿的人口有3.4到7.3亿之多。他们尤其集中在南亚和非洲撒哈拉以南的地区。这段文字想要说明的问题是()。

A．世界粮食产量的增长速度超过了人口的增长速度

B．尽管世界粮食生产充足，但仍有很多人口得不到充足的粮食

C．其他产品价格的增长速度比不上粮食的增长速度

D．因缺粮而面临饥饿的人口有3.4到7.3亿之多

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更多“一件可能使人感到吃惊的事实是，目前不但世界粮食产量的增长速度…”相关的问题

第1题

By default, each port in a Cisco Catalyst switch is assigned to VLAN1. Which two recommendations are key to avoid unauthorized management access？（）

A. Create an additional ACL to block the access to VLAN 1.

B. Move the management VLAN to something other than default.

C. Move all ports to another VLAN and deactivate the default VLAN.

D. Limit the access in the switch using port security configuration.

E. Use static VLAN in trunks and access ports to restrict connections.

F. Shutdown all unused ports in the Catalyst switch.

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第2题

在一台Cisco Catalyst 2950交换机上作如下配置：Switch # config terminalSwitch （config) # i

在一台Cisco Catalyst 2950交换机上作如下配置：

Switch # config terminal

Switch (config) # interface fastethernet 0/1

Switch (config-if) # switchport mode access

Switch (config-if) # switchport access vlan2

若要将fastethernet 0/1端口还原到默认配置状态，可以使用()命令。

A、Switch (config) # default fastethernet 0/1

B、Switch (config) # default interface fastethernet 0/1

C、Switch (config) # no fastethernet 0/1

D、Switch (config) # erase interface fastethernet 0/1

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第3题

When you enter the interface command auto qos voip cisco-phone on a port at the edge of a network, how does the Cisco Catalyst switch detect if a Cisco IP Phone is connected to the port？（）

A. by snooping the CoS marking on the incoming frames

B. by using RTP hello messages between the switch port and the Cisco IP Phone

C. by using CDP

D. by using DHCP snooping

E. by snooping the incoming 802.1Q VLAN tag

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第4题

When you enter the interface command auto qos voip cisco-phone on a port at the edge of a network,how does the Cisco Catalyst switch detect if a Cisco IP Phone is connected to the port？（）

A. by snooping the CoS marking on the incoming frames

B. by using RTP hello messages between the switch port and the Cisco IP Phone

C. by using CDP

D. by using DHCP snooping

E. by snooping the incoming 802.1Q VLAN tag

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第5题

Which of these commands can you use to show if an operational Catalyst switch port is set for autonegotiation of speed and duplex when running Cisco IOS software？（）

A. show port network

B. show running-config

C. show controllers Ethernet-controller

D. show interfaces

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第6题

Assuming the default switch configuration,which approach should you use to configure the extended vlan range（1006 through 4094) on a cisco catalyst 3750 series switch？（）

A. Configure the switch to be in VTP client mode.

B. Configure the switch to be in VTP domaint mode.

C. Configure the switch to be in VTP transparent mode.

D. Configure the switch to be in VTPv2.

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第7题

As a network administrator, you issue the interface auto qos voip cisco-phone command on a

port in an edge network. It is possible for a Cisco Catalyst switch to check if a Cisco IP Phone is directly attached to that port by:（）

A. using DHCP snooping

B. snooping the incoming 802.1Q VLAN tag

C. using CDP

D. snooping the CoS marking on the incoming frames

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第8题

While troubleshooting a connectivity problem, a network administrator notices that a port

status LED on a Cisco Catalyst series switch is alternating green and amber. Which condition could this indicate（）。

A.The port is experiencing errors

B.The port is administratively disabled

C.The port is blocked by spanning tree

D.The port has an active link with normal traffic activity

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第9题

A new Catalyst switch is connected to an existing switch using a crossover cable. As a result of this, what would the switch port link lights display？（）

A. The switch port link lights will be off on both switches indicating the ports are not connected.

B. The switch port link light will be off on one switch indicating that STP has disabled the port.

C. The switch port link lights will flash amber indicating an error.

D. The switch port link lights will be green indicating normal operation.

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第10题

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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