Most IP layer-based proxy mechanisms, such as network address translation(NAT), only support uni-directional proxy, from the internal network to external network(the Internet). The proxy establishes the communication channel by(66)IP addresses. The IP add

题目

Most IP layer-based proxy mechanisms, such as network address translation(NAT), only support uni-directional proxy, from the internal network to external network(the Internet). The proxy establishes the communication channel by(66)IP addresses. The IP addresses must be(67). These proxy mechanisms prevent applications that must establish return data channels from establishing their data channels, such as, multimedia applications. IP layer-based proxy mechanisms need additional software(68)for each application that uses(69)channels. SOCKS identifies communication targets through domain names, overcoming the restriction of using private IP addresses. SOCKS can use domain names to establish communication between separate LANs, with(70)IP addresses.

A．manufacturing

B．manipulating

C．conduct

D．implement

相似考题

1.What refers to the protocols used to determine who goes next on a multi-access channel?(29)A．MAC(medium access control)B．ARP(address resolution protocol)C．NAT(network address translation)D．CIDR(classless interdomain routing)

2.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 shiftingB. pool-based source NATC. static destination NATD. pool-based destination NAT

3.A network administrator has configured source NAT, translating to an address that is on a locally connected subnet.The administrator sees the translation working, but traffic does not appear to come back.What is causing the problem?（）A. The host needs to open the telnet port.B. The host needs a route for the translated address.C. The administrator must use a proxy-arp policy for the translated address.D. The administrator must use a security policy, which will allow communication between the zones.

4.Most IP layer-based proxy mechanisms，such as network address translation (NAT)，only supportuni-directional proxy，from the internal network to external network(the Interned．The proxvestablishes the communication channel by (71) IP addresses．The IP addresses must be (72) ．These proxy mechanisms prevent applications that must establish return data channels from establishing their data channels，such as，multimedia applications．IP layer-based proxy mechanisms need additional software (73) for each application that uses (74) channels． SOCKS identifies communication targets through domain names，overcoming the restriction of Usina private IP addresses．SOCKS can use domain names to establish communication between separate LANs，with (75) IP addresses．(66)A．manufacturingB．manipulatingC．conductD．implement

参考答案和解析
正确答案：B
更多“Most IP layer－based proxy mechanisms, such as network address translation(NAT), only suppo ”相关问题

  • 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：

    Which functionality is required within an IP router that is situated at the boundary of an IPv4 network and an IPv6 network to allow communication between IPv6－ only and IPv4 － only nodes?()

    A. Autoconfiguration

    B. Automatic 6to4 Tunnel

    C. Automatic 6to4 Relay

    D. Network Address Translator - Protocol Translator (NAT - PT)

    E. Intrasite Automatic T unnel Address Protocol (ISATAP)


    参考答案：D

  • 第3题：

    What will happen if a private IP address is assigned to a public interface connected to an ISP?()

    A. Addresses in a private range will be not routed on the Internet backbone.

    B. Only the ISP router will have the capability to access the public network.

    C. The NAT process will be used to translate this address in a valid IP address.

    D. Several automated methods will be necessary on the private network.

    E. A conflict of IP addresses happens, because other public routers can use the same range.


    参考答案：A

  • 第4题：

    防火墙一般都具有网络地址转换功能（Network Address Translation，NAT），NAT允许多台计算机使用一个（）连接网络。

    • A、Web浏览器
    • B、IP地址
    • C、代理服务器
    • D、服务器名

    正确答案:B

  • 第5题：

    In any NAT (network address translation) configuration, what is the Inside Global IP address?（）

    • A、The summarized address for all internal subnetted addresses.
    • B、A private IP address assigned to a host on the inside network.
    • C、A registered address that represents an inside host to an outside network.
    • D、A unique IP address used on an internal network
    • E、Non of the above

    正确答案:C

  • 第6题：

    Which statements are true concerning NAT？ （）

    • A、 NAT provides 1 to manyaddress mapping.
    • B、 NAT provides 1 to 1 address mapping.
    • C、 NAT is only useful forTCP/UDP and ICMP traffic.
    • D、 NAT can be used for all IP traffic.

    正确答案:B,D

  • 第7题：

    A client is having trouble connecting to the Internet. The client is using a static IP address and is able to connect to other devices on the network via IP address only. Which of the following is MOST likely the problem?（）

    • A、IMAP
    • B、DHCP
    • C、DNS
    • D、NAT

    正确答案:C

  • 第8题：

    单选题
    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
    解析： 暂无解析

  • 第9题：

    单选题
    Which functionality is required within an IP router that is situated at the boundary of an  IPv4 network and an IPv6 network to allow communication between IPv6- only and IPv4 - only nodes?（）
    A

    Autoconfiguration

    B

    Automatic 6to4 Tunnel

    C

    Automatic 6to4 Relay

    D

    Network Address Translator - Protocol Translator (NAT - PT)

    E

    Intrasite Automatic T unnel Address Protocol (ISATAP)


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    A network administrator has configured source NAT, translating to an address that is on a locally connected subnet.The administrator sees the translation working, but traffic does not appear to come back. What is causing the problem?（）
    A

    The host needs to open the telnet port.

    B

    The host needs a route for the translated address.

    C

    The administrator must use a proxy-arp policy for the translated address.

    D

    The administrator must use a security policy, which will allow communication between the zones.


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    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： D
    解析： 暂无解析

  • 第12题：

    单选题
    When should you enable Network Address Translation Transparency (NAT-T) on the Teleworker?（）
    A

    when a router between the Teleworker router and the head-end VPN router is doing NAT/pNAT and does not support IPSec pass-through 

    B

    when the Teleworker router itself is doing NAT/pNAT

    C

    always

    D

    never


    正确答案： D
    解析： 暂无解析

  • 第13题：

    A router that performs Network Address Translation (NAT) is installed between your computer and the Internet.The router fails. You connect the computer directly to the Internet.You need to ensure that the computer is connected to the Internet in the most secure manner possible.What should you do?（）

    A.A

    B.B

    C.C

    D.D


    参考答案：B

  • 第14题：

    In any NAT (network address translation) configuration, what is the Inside Global IP address?()

    A. The summarized address for all internal subnetted addresses.

    B. A private IP address assigned to a host on the inside network.

    C. A registered address that represents an inside host to an outside network.

    D. A unique IP address used on an internal network

    E. Non of the above


    参考答案：C

  • 第15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16题：

    Which functionality is required within an IP router that is situated at the boundary of an  IPv4 network and an IPv6 network to allow communication between IPv6- only and IPv4 - only nodes?（）

    • A、Autoconfiguration
    • B、Automatic 6to4 Tunnel
    • C、Automatic 6to4 Relay
    • D、Network Address Translator - Protocol Translator (NAT - PT)
    • E、Intrasite Automatic T unnel Address Protocol (ISATAP)

    正确答案:D

  • 第17题：

    What will happen if a private IP address is assigned to a public interface connected to an ISP?（）

    • A、Addresses in a private range will be not routed on the Internet backbone.
    • B、Only the ISP router will have the capability to access the public network.
    • C、The NAT process will be used to translate this address in a valid IP address.
    • D、Several automated methods will be necessary on the private network.
    • E、A conflict of IP addresses happens, because other public routers can use the same range.

    正确答案:A

  • 第18题：

    A computer that has dynamic IP addressing is not receiving an IP address. Which of the following is MOST likely the problem?（）

    • A、SNMP
    • B、DHCP
    • C、DNS
    • D、NAT

    正确答案:B

  • 第19题：

    Your network contains a server named Server1 that has the Routing role service installed. Server1 has two network connections. One network connection connects to the internal network. The other network connection connects to the Internet.All network connections connected to the internal network use private IP addresses. You install a Web server named Web1. Web1 hosts a secured Web site that only allows connections over TCP port 8281. Web1 is connected to the internal network.You need to ensure that the secure Web site can be accessed from the Internet.What should you do from the Routing and Remote Access console？（）

    • A、Configure Routing Information Protocol (RIP), and then activate authentication on the RIP interface.
    • B、Configure Routing Information Protocol (RIP), and then configure the incoming packet protocol settings on the RIP interface.
    • C、Configure Network Address Translation (NAT), and then add a new service to the NAT interface.
    • D、Configure Network Address Translation (NAT), and then enable the Secure Web Server (HTTPS) service on the NAT interface.

    正确答案:C

  • 第20题：

    单选题
    A client is having trouble connecting to the Internet. The client is using a static IP address and is able to connect to other devices on the network via IP address only. Which of the following is MOST likely the problem?（）
    A

    IMAP

    B

    DHCP

    C

    DNS

    D

    NAT


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    In any NAT (network address translation) configuration, what is the Inside Global IP address?（）
    A

    The summarized address for all internal subnetted addresses.

    B

    A private IP address assigned to a host on the inside network.

    C

    A registered address that represents an inside host to an outside network.

    D

    A unique IP address used on an internal network

    E

    Non of the above


    正确答案： B
    解析： 暂无解析

  • 第22题：

    多选题
    A network administrator receives complaints from the engineering group that an application on one server is not working properly. After further investigation, the administrator determines that source NAT translation is using a different source address after a random number of flows. Which two actions can the administrator take to force the server to use one address?（） (Choose two.)
    A

    Use the custom application feature.

    B

    Configure static NAT for the host.

    C

    Use port address translation (PAT).

    D

    Use the address-persistent option.


    正确答案： C,B
    解析： 暂无解析

  • 第23题：

    单选题
    Your network contains an Active Directory domain named contoso.com. The domain contains a server named Server1 that runs Windows Server 2012 R2. You create a new inbound rule by using Windows Firewall with Advanced Security. You need to configure the rule to allow Server1 to accept unsolicited inbound packets that are received through a network address translation （NAT） device on the network. Which setting in the rule should you configure？（）
    A

    Edge traversal

    B

    Authorized computers

    C

    Interface types

    D

    Remote IP address


    正确答案： A
    解析： 暂无解析

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