Transportation Decision Transportation decision consists of the following parts: 1.Selection of the mode is determined by the consideration of distance,cargo weights,linkage,timing and other requirements.Generally speaking,rail has high fixed cost and the relatively low variable cost.It can move heavy,large quantity of cargo in the long distance.But,rail is disadvantaged because of the longer transit time and less frequent service than motor. Motor carriers such as truck companies offer door-to-door service,that is,the cargo can be shipped from the shipper＇swarehouse to the consignee＇s.Trucking fixed cost is the lowest of any carrier,because the equipment is fairly cheap and the motor carriers do not have to invest in the roads on which they run their operations.However,their variable costs are very high.Its expenses include two major components:firstly,the pick-up and delivery costs;secondly,there are gas or fuel costs,labor expenses and toll roads fees to be paid to highway and toll road operators Therefore,motor transport is good for cargo with small quantity to be shipped within short distances. Water is the predominant choice of transportation as it has the capacity to take greatest quantity,travel longest distance with lowest cost.Transport by sea accounts for 80% of in-ternational trade.The major expenses for water are expenses associated with investment and maintenance of the ships and terminals.For example,a 100000-ton container ship costs US$ 200 million.Terminal associated costs include harbor fees and the cost for loading and unloading the goods. Transport by air has the highest cost but it is fast with the lowest ratio of loss and dam-age.If you need to deliver an urgent order,there is little choice but by air. 2.Transport service provider is selected for its experiences,equipment,services and prices.Competitive in the transport industry usually drives the prices down and motivates for better services.A company also chooses its transport service provider because of its long-standing business relationship with certain shipping companies. 3.The alternative routing and scheduling is specific for motor only because railway and water have strict route and timetable.Motor has special advantage in terms of flexibility.It has the ability to load goods at greater frequency,travel through different routes and making deliveries to different loca-tions.Questions:

How is the transportation mode selected?( )

A:By suppliers. B:By customers. C:By consideration of distance,weight,linkage and other requirements. D:By government requirements.

Transportation Decision Transportation decision consists of the following parts: 1.Selection of the mode is determined by the consideration of distance,cargo weights,linkage,timing and other requirements.Generally speaking,rail has high fixed cost and the relatively low variable cost.It can move heavy,large quantity of cargo in the long distance.But,rail is disadvantaged because of the longer transit time and less frequent service than motor. Motor carriers such as truck companies offer door-to-door service,that is,the cargo can be shipped from the shipper＇swarehouse to the consignee＇s.Trucking fixed cost is the lowest of any carrier,because the equipment is fairly cheap and the motor carriers do not have to invest in the roads on which they run their operations.However,their variable costs are very high.Its expenses include two major components:firstly,the pick-up and delivery costs;secondly,there are gas or fuel costs,labor expenses and toll roads fees to be paid to highway and toll road operators Therefore,motor transport is good for cargo with small quantity to be shipped within short distances. Water is the predominant choice of transportation as it has the capacity to take greatest quantity,travel longest distance with lowest cost.Transport by sea accounts for 80% of in-ternational trade.The major expenses for water are expenses associated with investment and maintenance of the ships and terminals.For example,a 100000-ton container ship costs US$ 200 million.Terminal associated costs include harbor fees and the cost for loading and unloading the goods. Transport by air has the highest cost but it is fast with the lowest ratio of loss and dam-age.If you need to deliver an urgent order,there is little choice but by air. 2.Transport service provider is selected for its experiences,equipment,services and prices.Competitive in the transport industry usually drives the prices down and motivates for better services.A company also chooses its transport service provider because of its long-standing business relationship with certain shipping companies. 3.The alternative routing and scheduling is specific for motor only because railway and water have strict route and timetable.Motor has special advantage in terms of flexibility.It has the ability to load goods at greater frequency,travel through different routes and making deliveries to different loca-tions.Questions:

Which mode account for most delivery in international trade?( )

A:By railway. B:By water. C:By air. D:By trucks.

S2126G交换机如何将接口设置为TAGVLAN模式？（）

A:switchport mode tag B:switchport mode trunk C:trunk on D:set port trunk on

交换机命令show interfaces type0/port_#switchport|trunk用于显示中继连接的配置情况，下面是显示例子：
2950#show interface fastEthernet0/1 switchport
Name: fa0/1
Switchport: EnabledA．VLAN0 B．VLAN1 C．VLAN2 D．VLAN3

A:Administrative mode: trunk B:Operational Mode: trunk C:Administrative Trunking Encapsulation: dotlq D:Operational Trunking Encapsulation: dotlq E:egotiation of Trunking: disabled F:Access Mode VLAN: 0((inactive)) G:Trunking Native Mode VLAN: 1(default) H:Trunking VLANs Enabled: all I:Trunking VLANs active: 1, 2 J:Pruning VLANs Enabled: 2-1001 K:Priority for untagged frames: 0 L:Override vlan tag priority: FALSE M:Voice VLAN: none N:在这个例子中，端口fa0/1的链路模式被设置为______状态，默认的vlan是______。

某公司下设3个部门，为了便于管理，每个部门组成一个VLAN，公司网络结构如图1所示。 [交换机Switch1的部分配置信息] Switch1(config)#tinterface fO/9 Switch1(config-if)#switchport mode access Switch1(config-if)#switchport access vlan 11 Switch1(config)#interface fO/10 Switch1(config-if)#switchport mode access Switch1(config-if)#switchport access vlan 12 Switch1(config)#interface fO/17 Switch1(config-if)#switchport mode access Switch1(config-if)#switchport access vlan 13 [交换机Switch2的部分配置信息] Switch2(config)#interface fO/6 Switch2(config-if)#switchport mode access Switch2(config-if)#switchport access vlan 11 Switch2(config)#interface fO/8 Switch2(config-if)#switchport modeaccess Switch2(config-if)#switchport access vlan 12 Switch2(config)#interface fO/11 Switch2(config-if)#switchport mode access Switch2(config-if)#SWitchport access vlan 13 [交换机Switch3的部分配置信息] Switch3(config)#interface fO/3 Switch3(config-if)#switchport mode access Switch3(config-if)#switchport access vlan 11 Switch3(config-if)#exit Switch3(config)#interface fO/7 Switch3(config-if)#switchport mode access Switch3(config-if)#switchport access vlan 12 Switch3(config)#interface fO/13 Switch3(config-if)#switchport mode access Switch3(config-if)#switchport aocess vlan 131.划分VLAN有哪几种划分方式

阅读以下交换机的配置信息，回答问题。 [说明] 某公司下设三个部门，为了便于管理，每个部门组成一个Vlan，某公司的网络拓扑结构图如图17-13所示。 [交换机Switch1的部分配置信息] switch1 (config)# interface f0/9 Switch1 (config-if)#switchport mode access Switch1 (config-if)#switchport access vlan 11 Switch1 (config)#interface f0/10 Switch1 (config-if)#switchport mode access Switch1 (config-if)#switchport access vlan 12 Switch1 (config)#interface f0/17 Switch1 (config-if)#switchport mode accesS Switch1 (config-if)switchport accesS vlan 13 [交换机Switch2的部分配置信息] Switch1 (config)#interface f0/6 Switch1 (config-if)#switchport mode access Switch1 (config-if)#switchport access vlan 11 Switch1 (config)#interface f0/8 Switch1 (config-if)#switchport mode access Switch1 (config-if)#switchport access vlan 12 Switch1 (config)#interface f0/11 Switch1 (config-if)#switchport mode access Switch1 (config-if)#switchport access vlan 13 [交换机Switch3的部分配置信息] Switch1 (config)#interface f0/3 Switch1 (config-if)#switchport mode access Switch1 (config-if)switchport access vlan 11 Switch1 (config)#interface f0/7 Switch1 (config-if)switchport mode access Switch1 (config-if)#switchport access vlan 12 Switch1 (config)#interface f0/11 Switch1 (config-if)#switchport mode access Switch1 (config-if)#switchport access vlan 13

阅读以下说明和交换机的配置信息，回答问题1～3，将解答填入对应栏内。 某公司下设3个部门，为了便于管理，每个部门组成一个VLAN，公司网络结构如图1所示。 [交换机Switch1的部分配置信息] Switch1(config)#tinterface fO/9 Switch1(config-if)#switchport mode access Switch1(config-if)#switchport access vlan 11 Switch1(config)#interface fO/10 Switch1(config-if)#switchport mode access Switch1(config-if)#switchport access vlan 12 Switch1(config)#interface fO/17 Switch1(config-if)#switchport mode access Switch1(config-if)#switchport access vlan 13 [交换机Switch2的部分配置信息] Switch2(config)#interface fO/6 Switch2(config-if)#switchport mode access Switch2(config-if)#switchport access vlan 11 Switch2(config)#interface fO/8 Switch2(config-if)#switchport modeaccess Switch2(config-if)#switchport access vlan 12 Switch2(config)#interface fO/11 Switch2(config-if)#switchport mode access Switch2(config-if)#SWitchport access vlan 13 [交换机Switch3的部分配置信息] Switch3(config)#interface fO/3 Switch3(config-if)#switchport mode access Switch3(config-if)#switchport access vlan 11 Switch3(config-if)#exit Switch3(config)#interface fO/7 Switch3(config-if)#switchport mode access Switch3(config-if)#switchport access vlan 12 Switch3(config)#interface fO/13 Switch3(config-if)#switchport mode access Switch3(config-if)#switchport aocess vlan 13 填充VLAN信息表，见表1，将答案填写在相应位置。

阅读以下说明和交换机的配置信息，回答下面问题。 【说明】 某公司下设三个部门，为了便于管理，每个部门组成一个VLAN，公司网络结构如图2.8所示。 [交换机Switch1的部分配置信息] Switch1(config)#finterface fO/9 Switch1(config-if)#switchport mode access Switch1(config-if)#switchport access vlan 11 Switch1(config)#interface fO/10 Switch1(config-if)#switchport mode access Switch1(config-if)#switchport access vlan 12 Switch1(config)#interface fO/17 Switch1(config-if)#switchport mode access Switch1(config-if)#switchport access vlan 13 [交换机Switch2的部分配置信息] Switch2(config)#interface fO/6 Switch2(config-if)#switchport mode access Switch2(config-if)#switchport access vlan 11 Switch2(config)#interface fO/8 Switch2(config-if)#switchport mode access Switch2(config-if)#switchport access vlan 12 Switch2(config)#interface fO/11 Switch2(config-if)#switchport mode access Switch2(config-if)#switchport access vlan 13 [交换机Switch3的部分配置信息] Switch3(config)#interface fO/3 Switch3(config-if)#switchport mode access Switch3(config-if)#switchport access vlan 11 Switch3(config-if)#exit Switch3(config)#interface fO/7 Switch3(config-if)#switchport mode access Switch3(config-if)#switchport access vlan 12 Switch3(config)#interface fO/13 Switch3(config-if)#switchport mode access Switch3(config-if)#switchport access vlan 13 【问题2】 在VLAN中，STP和VTP是什么协议各有什么作用

[说明]某公司下设三个部门，为了便于管理，每个部门组成一个VLAN，公司网络结构如图12-2所示。[交换机Switch1的部分配置信息] Switch1(config)#interface f0/9 Switchl(config-if)#switchport mode access Switchl(config-if)#switchport access vlan 11 Switch1(config)#interface f0/l0 Switch1(config-if)#switchport mode access Switchl(config-if)#switchport access vlan 12 Switch1(config)#interface f0/17 Switchl(config-if)#switchport mode access Switchl(config-if)#switchport access vlan 13[交换机Switch2的部分配置信息] Switch2(config)#interface f0/6 Switch2(config-if)#switchport mode access Switch2(config-if)#switchport access vlan 11 Switch2(config)#interface f0/8 Switch2(config-if)#switchport mode access Switch2(config-if)#switchport access vlan 12 Switch2(config)#intefface f0/11 Switch2(config-if)#switchport mode access Switch2(config-if)#switchport access vlan 13[交换机Switch3的部分配置信息] Switch3(config)#interface f0/3 Switch3(config-if)#switchport mode access Switch3(config-if)#switchport access vlan 11 Switch3(config-if)#exit Switch3(config)#interface f0/7 Switch3(config-if)#switchport mode access Switch3(config-if)#switchport access vlan 12 Switch3(config)#interface f0/13 Switch3(config-if)#switchport mode access Switch3(config-if)#switchport access vlan 131.通常VLAN有静态和动态两种实现方式，这两种方式分别是如何实现的各有什么特点？Switchl采用的是哪种实现方式？