路由器配置中,创建一个名字为cisco含有30个地址的动态NAT池的命令是()。A、ip nat pool cisco 171.16.10.65 171.16.10.94 net 255.255.255.240B、ip nat pool cisco 171.16.10.65 171.16.10.94 net 255.255.255.224C、ip nat pool CISCO 171.16.10.65 171.16.10.94 net 255.255.255.224D、ip nat pool cisco

题目

路由器配置中,创建一个名字为cisco含有30个地址的动态NAT池的命令是()。

  • A、ip nat pool cisco 171.16.10.65 171.16.10.94 net 255.255.255.240
  • B、ip nat pool cisco 171.16.10.65 171.16.10.94 net 255.255.255.224
  • C、ip nat pool CISCO 171.16.10.65 171.16.10.94 net 255.255.255.224
  • D、ip nat pool cisco 171.16.10.1 171.16.10.254 net 255.255.255.0

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  • 第1题:

    随着Internet迅速发展,公网IP地址短缺已成为一个十分突出的问题。为了解决这一问题,出现了多种解决方案。而使用路由器的NAT/NAPT(Network Address Translation/Network Address Port Translation)功能是其中一种解决方法。

    如图5-1所示,某企业通过租用ISP的线路(获得的公网IP网段为:218.94.86.0/29,除去两个互联的IP地址),实现企业的电子商务。其中,有一对外的Web服务器(内网IP地址为192.168.0.100/24),一OA服务器(内网IP地址为192.168.0.101/24)。

    以下是本端路由器的配置摘要,请解释其中部分语句的含义(“//”后为注释内容)。

    version 11.2 //版本

    !

    hostname RouterCOM //路由器名称

    !

    interface Seria10 //串口0

    ip address 218.94.86.2 255.255.255.248 //串口0的ip地址

    ip nat outside (1)

    !

    interface FastEthernet 0 //快速以太口0

    ip address 192.168.0.1 255.255.255.0 //快速以太口0的ip地址

    ip nat inside (2)

    !

    access-list 1 permit 192.168.0.0 0.0.0.255 (3)

    !

    ip nat pool natpool 218.94.86.5 218.94.86.6 netmask 255.255.255.248

    (4)

    ip nat inside source static 192.168.0.100 218.94.86.3 (5)

    ip nat inside source statiC 192.168.0.101 218.94.86.4

    ip nat inside source list 1 pool natpool overload (6)

    ……(略)

    end


    正确答案:定义进行NAT的对外接口 定义进行NAT的对内接口 定义进行地址转换的源IP地址列表 定义名为natpool的地址转换使用的地址池 将内部Web服务器内网IP(地址为192.168.0.100)静态映射为公网IP 218.94.86.3 声明如果源IP地址属于IP访问控制列表(ACL)1的终端则使用所声明的地址池进行地址转换
    定义进行NAT的对外接口 定义进行NAT的对内接口 定义进行地址转换的源IP地址列表 定义名为natpool的地址转换使用的地址池 将内部Web服务器内网IP(地址为192.168.0.100)静态映射为公网IP 218.94.86.3 声明如果源IP地址属于IP访问控制列表(ACL)1的终端则使用所声明的地址池进行地址转换

  • 第2题:

    A Cisco router has been configured with the following command:IP nat pool nat-test 192.168.6.10 192.168.6.20 netmask 255.255.255.0his is an example of what type of NAT?()

    A. Static NAT

    B. Dynamic NAT

    C. Dynamic NAT with overload

    D. Port Address Translation

    E. None of the above


    参考答案:B

  • 第3题:

    Refer to the exhibit. What command sequence will enable PAT from the inside to outside network?()

    A.(config) ip nat pool isp-net 1.2.4.2 netmask 255.255.255.0 overload

    B.(config-if) ip nat outside overload

    C.(config) ip nat inside source list 1 interface ethernet1 overload

    D.(config-if) ip nat inside overload


    参考答案:C

  • 第4题:

    阅读以下说明,回答问题1至问题4,将解答填入答题纸对应的解答栏内。
    【说明】
    某公司上网用户较少(约50台上网机器),因此公司网管申请了公网IP地址(117.112.2.101/30),拟通过NAT方式结合ACL提供公司内部员工上网,公司内网IP地址段为192.168.1.0/24。
    该公司的网络拓扑结构如图3-1所示。

    【问题3】(6分)
    为实现该公司员工通过出口设备访问互联网的需求,必须在路由器Rl上配置基于端口的动态地址转换,也就是PAT,请解释或完成下列配置命令。
    .....
    Rl(config)# ip route 0.0.0.0 0.0.0.0 s0 // (12)
    Rl(config)# access-list 1 permit 192.168.1.0 0.0.0.255 // (13)
    R1 (config)#ip nat pool public 117.112.2.101 117.112.2.101 netmask 255.255.255.0
    Rl(config)#ip nat inside source list l pool public // 定义NAT转换关系
    Rl(config)#interface (14)
    Rl(config-if)#ip nat inside
    lRl(config)#interhce (15)
    Rl(config-if)#ip nat outside // 定义NAT的内部和外部接口
    ......
    Rl#show ip nat transWions // 显示NAT转换表
    Rl#show ip nat statistics // 显示当前NAT状态
    Rl#write // (16)
    Rl#reload // (17)
    ......


    答案:
    解析:
    12.设置默认静态路由,从S0接口连接到互联网
    13.允许 192.168.1.0 的内部网进行地址转换
    14. F0/1
    15 S0
    16 保存配置文件
    17 重新启动设备

  • 第5题:

    路由器配置中,静态NAT映射的命令是()。

    • A、ip nat inside source static 61.51.3.104 10.83.91.2
    • B、ip nat inside
    • C、ip nat outside
    • D、access-list 1 permit 10.83.91.0 0.0.1.255

    正确答案:A

  • 第6题:

    What is the function of the Cisco IOS command ip nat inside source static 10.1.1.5 172.35.16.5()。

    • A、It creates a global address pool for all outside NAT transactions
    • B、It establishes a dynamic address pool for an inside static address
    • C、It creates dynamic source translations for all inside local PAT transactions
    • D、It creates a one-to-one mapping between an inside local address and an inside global address
    • E、It maps one inside source address to a range of outside global addresses

    正确答案:D

  • 第7题:

    A Cisco router has been configured with the following command:IP nat pool nat-test 192.168.6.10 192.168.6.20 netmask 255.255.255.0his is an example of what type of NAT?()

    • A、Static NAT
    • B、Dynamic NAT
    • C、Dynamic NAT with overload
    • D、Port Address Translation
    • E、None of the above

    正确答案:B

  • 第8题:

    Interface ge-0/0/2.0 of your device is attached to the Internet and is configured with an IP address and network mask of 71.33.252.17/24. A Web server with IP address 10.20.20.1 is running an HTTP service on TCP port 8080. The Web server is attached to the ge-0/0/0.0 interface of your device. You must use NAT to make the Web server reachable from the Internet using port translation. Which type of NAT must you configure?()

    • A、source NAT with address shifting
    • B、pool-based source NAT
    • C、static destination NAT
    • D、pool-based destination NAT

    正确答案:D

  • 第9题:

    Which statement describes the behavior of source NAT with address shifting?()

    • A、Source NAT with address shifting translates both the source IP address and the source port of a packet.
    • B、Source NAT with address shifting defines a one-to-one mapping from an original source IP address to a translated source IP address.
    • C、Source NAT with address shifting can translate multiple source IP addresses to the same translated IP address.
    • D、Source NAT with address shifting allows inbound connections to be initiated to the static source pool IP addresses.

    正确答案:B

  • 第10题:

    路由器配置中,在外部地址连接的一端需要配置的命令,错误的是()。

    • A、ip nat inside
    • B、ip nat outside
    • C、ip outside global
    • D、ip inside local
    • E、ip inside global

    正确答案:A,C,D,E

  • 第11题:

    单选题
    路由器配置中,创建一个名字为cisco含有30个地址的动态NAT池的命令是()。
    A

    ip nat pool cisco 171.16.10.65 171.16.10.94 net 255.255.255.240

    B

    ip nat pool cisco 171.16.10.65 171.16.10.94 net 255.255.255.224

    C

    ip nat pool CISCO 171.16.10.65 171.16.10.94 net 255.255.255.224

    D

    ip nat pool cisco 171.16.10.1 171.16.10.254 net 255.255.255.0


    正确答案: C
    解析: 暂无解析

  • 第12题:

    单选题
    What is the function of the Cisco IOS command ip nat inside source static 10.1.1.5 172.35.16.5?()
    A

    It creates a global address pool for all outside NAT transactions.

    B

    It establishes a dynamic address pool for an inside static address.

    C

    It creates dynamic source translations for all inside local PAT transactions.

    D

    It creates a one-to-one mapping between an inside local address and an inside global address.

    E

    It maps one inside source address to a range of outside global addresses.


    正确答案: D
    解析: 暂无解析

  • 第13题:

    ● 试题五

    NAT英文全称是"Network Address Translation",中文意思是"网络地址转换",它是一个IETF(Internet Engineering Task Force,Internet工程任务组)标准,允许一个整体机构以一个公用IP(Internet Protocol)地址出现在Internet上。顾名思义,它是一种把内部私有网络地址(IP地址)翻译成合法网络IP地址的技术,如图4所示。

    某公司通过专线上网,申请的合法Internet IP地址段为192.1.1.1~192.1.1.10,使用路由器的NAT功能进行地址转换,具体配置如下:

    Current configuration:

    version 11.3

    no service password-encryption

    hostname 2501

    ip nat pool aaa 192.1.1.2 192.1.1.10 netmask 255.255.255.0

    ip nat inside source list 1 pool aaa

    interface Ethernet0

    ip address 10.1.1.1 255.255.255.0

    ip nat inside

    interface Serial0

    ip address 192.1.1.1 255.255.255.0

    ip nat outside

    no ip mroute-cache

    bandwidth 2000

    no fair-queue

    clockrate 2000000

    interface Serial1

    no ip address

    shutdown

    no ip classless

    ip route 0.0.0.0.0.0.0.0 Serial0

    access-list 1 permit 10.1.1.0.0.0.0.255

    line con 0

    line aux 0

    line vty 0 4

    password cisco

    end

    [问题1]NAT按技术类型分为哪3种转换方式?

    [问题2]请解释画线部分内容含义?

    [问题3]此配置中采用了那种转换方式?


    正确答案:
    ●试题五[问题1]【答案】NAT可以分为静态地址转换和动态地址转换和复用动态地址转换3种方式。[问题2]【解析】Currentconfiguration:version11.3noservicepassword-encryptionhostname2501//路由器名称为2501ipnatpoolaaa192.1.1.2192.1.1.10netmask255.255.255.0//内部合法地址池名称为aaa,地址范围为192.1.1.2~192.1.1.10,子网掩码为255.255.255.0ipnatinsidesourcelist1poolaaa//将由access-list1指定的内部本地地址与指定的内部合法地址池aaa进行地址转换。interfaceEthernet0ipaddress10.1.1.1255.255.255.0ipnatinside//指定与内部网络相连的内部端口为Ethernet0interfaceSeria10ipaddress192.1.1.1255.255.255.0ipnatoutsidenoipmroute-cachebandwidth2000//带宽为2Mnofair-queueclockrate2000000interfaceSeriallnoipaddressshutdownnoipclasslessiproute0.0.0.00.0.0.0Serial0//指定静态默认路由指向Serial0access-list1permit10.1.1.00.0.0.255//定义一个标准的access-list1以允许10.1.1.0网段,子网掩码的反码为0.0.0.255的内部地址可以进行动态地址转换linecon0lineaux0linevty04passwordciscoend[问题3]【答案】此配置中nat采用了动态地址转换。

  • 第14题:

    What is the function of the Cisco IOS command ip nat inside source static 10.1.1.5 172.35.16.5()。

    A.It creates a global address pool for all outside NAT transactions

    B.It establishes a dynamic address pool for an inside static address

    C.It creates dynamic source translations for all inside local PAT transactions

    D.It creates a one-to-one mapping between an inside local address and an inside global address

    E.It maps one inside source address to a range of outside global addresses


    参考答案:D

  • 第15题:

    Refer to the exhibit. Which command would allow the translations to be created on the router?()

    A.ip nat pool mynats 1.1.128.1 1.1.135.254 prefix-length 19

    B.ip nat outside mynats 1.1.128.1 1.1.135.254 prefix-length 19

    C.ip nat pool mynats 1.1.128.1 1.1.135.254 prefix-length 18

    D.ip nat outside mynats 1.1.128.1 1.1.135.254 prefix-length 18


    参考答案:A

  • 第16题:

    路由器配置中,下列()命令不是用来显示路由器上的发生实时地址转换信息的命令。

    • A、show ip nat translations
    • B、show ip nat statistics
    • C、debug ip nat
    • D、clear ip nat translation
    • E、clear ip nat translation *

    正确答案:A,B,D,E

  • 第17题:

    静态NAT的cisco路由器的配置,正确的指令是()

    • A、ip nat inside source static 192.168.0.3 211.139.250.234
    • B、ip nat inside source static 192.168.0.3 255.255.255.248 211.139.250.234
    • C、ip nat inside source static 192.168.0.3 211.139.250.234 255.255.255.248
    • D、ip nat inside source static 211.139.250.234 192.168.0.3

    正确答案:B

  • 第18题:

    What is the function of the Cisco IOS command ip nat inside source static 10.1.1.5 172.35.16.5?()

    • A、It creates a global address pool for all outside NAT transactions.
    • B、It establishes a dynamic address pool for an inside static address.
    • C、It creates dynamic source translations for all inside local PAT transactions.
    • D、It creates a one-to-one mapping between an inside local address and an inside global address.
    • E、It maps one inside source address to a range of outside global addresses.

    正确答案:D

  • 第19题:

    设置NAT时,要在路由器外部端口上设置()。

    • A、ip nat inside
    • B、ip nat ouside
    • C、ip nat inbound
    • D、ip nat outbound

    正确答案:B

  • 第20题:

    Interface ge-0/0/2.0 of your device is attached to the Internet and is configured with an IP address andnetwork mask of 71.33.252.17/24. A webserver with IP address 10.20.20.1 isrunning an HTTP service on TCP port 8080. The webserver is attached to the ge-0/0/0.0 interface of yourdevice. You must use NAT to make the webserver reachable from the Internet using port translation.Which type of NAT must you configure?()

    • A、source NAT with address shifting
    • B、pool-based source NAT
    • C、static destination NAT
    • D、pool-based destination NAT

    正确答案:D

  • 第21题:

    路由器配置中,在内部地址连接的一端需要配置的命令是()。

    • A、ip nat inside
    • B、ip nat outside
    • C、ip outside global
    • D、ip inside local

    正确答案:A

  • 第22题:

    在MSR路由器上,使用()命令配置NAT地址池。

    • A、nat address-group
    • B、nat ip pool
    • C、nat net pool
    • D、nat pool

    正确答案:A

  • 第23题:

    单选题
    A Cisco router has been configured with the following command:IP nat pool nat-test 192.168.6.10 192.168.6.20 netmask 255.255.255.0his is an example of what type of NAT?()
    A

    Static NAT

    B

    Dynamic NAT

    C

    Dynamic NAT with overload

    D

    Port Address Translation

    E

    None of the above


    正确答案: E
    解析: 暂无解析