?Look at the charts below. They show the sales of cars in different department stores during 1998, 1999 and 2000.
?Which chart does each sentence (1 -5)describe?
?For each sentence, mark the correct letter(A--H)on your Answer Sheet.
?Do not use any letter more than once.
Bicycle sales hardly changed throughout the period, except for a slight fall in 199
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阅读以下说明,回答问题1至问题3,将解答填入解答栏内。
【说明】
某公司租用了一段C类地址203.12.11.0/24~203.12.14.0/24,如下图所示。其网间地址是172.11.5.14/24。要求网内所有PC都能上网。
接入层交换机Switch1的端口24为trunk口,其余各口属于vlan11,请解释下列命令并完成交换机的配置。
Switch1config terminal
Switch1(config)interface f0/24(进入端口24配置模式)
Switch1(config-if) switchport mode trunk(1)
Switch1(config-if)switchport trunk encapsulation dotlq(2)
Switch1(config-if) switchport trunk allowed all(允许所有VLAN从该端口交换数据)
Switch1(config-if)exit
Switch1(config)exit
Swkch1 vlan database
Switch1(vlan) vlan11 name lab01(3)
Switch1(vlan)exit
Switch1 config terminal
Switch1(config)interface f0/9(进入f0/9的配置模式)
Switch1(config-if)(4)(设置端口为接入链路模式)
Switch1(config-if)(5)(把f0/9分配给VLAN11)
Switch1(config-if)exit
Switch1(config)exit
下表是该系统中路由器的IP地址分配表。
请根据上图完成以下R3路由器的配置:
R3(config)interface e0/1(进入接口e0/1配置模式)
R3(coafig-if) ip address 202.115.13.254(4)(设置IP地址和掩码)
R3(config) interface s0/0(进入串口配置模式)
R3(config-if) ip address(5)<255.255.255.0(设置IP地址和掩码)
R3(config) interface s0/1
R3(config-if)ip address(6)255.255.255.0
R3(config) interface s0/2
R3(eonfig-if)ip address(7)255.255.255.0
R3(config) interface s0/3
R3(eonfig-if)ip address(8)255.255.255.0
R3(config) interface s0/4
R3(config-if)ip address(9)255.255.255.0
R3(config) interface s0/5
R3(config-if) ip address(10)255.255.255.0
设某循环队列的容量为50,如果头指针front=45(指向队头元索的前一位置),尾指针Teatr=lO(指向队尾元素),则该循环队列中共有【 】个元素。