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Using FTP passive mode， after the client opens thecommand channel （port 21） to the FTP server and requests passive mode， what will be the next step？ （）A、 The FTP server sends back an acknowledgment （ACK） to the clientB、 The FTP server allocates a port tou

题目

Using FTP passive mode， after the client opens thecommand channel （port 21） to the FTP server and requests passive mode， what will be the next step？ （）

  • A、 The FTP server sends back an acknowledgment （ACK） to the client
  • B、 The FTP server allocates a port touse for the data channel and transmit that port number to the client
  • C、 The FTP server opens the data channel to the client using the port number indicated by the client
  • D、 The FTP client opens the data channel to the FTP server on Port 20
  • E、 The FTP client opens the datachannel to the FTP server on Port 21
相似考题

1.在使用FTP工具向OMC服务器(Linux操作系统)中上传文件时，应选用『____』传送模式。(Using the FTP tool upload file to the OMC server (Linux operating system),the transfer mode should be used in『____』.)

2.An operator needs to transfer several files in the same directory using ftp without being prompted. Which of the following ftp subcommands must be used?()A. int put *B. int mput *C. prompt put *D. prompt mput *

3.关于FTP用户接口命令的描述中，正确的是A.ftp用于进入ftp会话状态B.close用于中断与ftp服务器的连接C.passive用于请求使用被动传输模式D.pwd用于传送用户口令E.binary指示服务器使用二进制文件传输方式

4.Which three actions must you perform as part of the WXOS software upgrade process?()(Choose three.)A. Reboot the device.B. Reapply the license key.C. Save the current configuration.D. Load the image using FTP, TFTP, or from the local disk.E. Back up the configration using FTP, TFTP, or to the local disk

更多“Using FTP passive”相关问题

  • 第1题：

    The File Transfer Protocol (FTP) is a standard network protocol used for the transfer of computer （ ） between a client and server on a computer network.FTP is built on a （请作答此空） model architecture using separate control and data connections between the client and the server. FTP users may authenticate themselves with a （ ） sign-in protocol, normally in the form of a username and password, but can connect anonymously if the server is configured to allow it. For secure transmission that protects the username and password, and encrypts the content, FTP is often secured with SSL/TLS (FTPS) or replaced with SSH File Transfer Protocol (SFTP).The first FTP client applications were （ ） programs developed before operating systems had graphical user interfaces, and are still shipped with most Windows, Unix, and Linux operating systems. Many FTP clients and automation utilities have since been developed for desktops, servers, mobile devices, and hardware, and FTP has been incorporated into productivity applications, such as HTML editors.FTP may run in （ ） mode, which determines how the data connection is established. In both cases, the client creates a TCP control connection from a random, usually an unprivileged, port N to the FTP server command port 21.In active mode, the client starts listening for incoming data connections from the server on port M. It sends the FTP command PORT M to inform the server on which port it is listening. The server then initiates a data channel to the client from its port 20, the FTP server data port.In situations where the client is behind a firewall and unable to accept incoming TCP connections, passive mode may be used. In this mode, the client uses the control connection to send a PASV command to the server and then receives a server IP address and server port number from the server, which the client then uses to open a data connection from an arbitrary client port to the server IP address and server port number received.Both modes were updated in September 1998 to support IPv6. Further changes were introduced to the passive mode at that time, updating it to extended passive mode.

    A.browser-server
    B.user- server
    C.client-server
    D.business -customer

    答案：C
    解析：
    The File Transfer Protocol (FTP) is a standard network protocol used for the transfer of computer files between a client and server on a computer network.FTP is built on a client-server model architecture using separate control and data connections between the client and the server. FTP users may authenticate themselves with a clear-text sign-in protocol, normally in the form of a username and password, but can connect anonymously if the server is configured to allow it. For secure transmission that protects the username and password, and encrypts the content, FTP is often secured with SSL/TLS (FTPS) or replaced with SSH File Transfer Protocol (SFTP).The first FTP client applications were command-line programs developed before operating systems had graphical user interfaces, and are still shipped with most Windows, Unix, and Linux operating systems. Many FTP clients and automation utilities have since been developed for desktops, servers, mobile devices, and hardware, and FTP has been incorporated into productivity applications, such as HTML editors.FTP may run in active or passive mode, which determines how the data connection is established. In both cases, the client creates a TCP control connection from a random, usually an unprivileged, port N to the FTP server command port 21.In active mode, the client starts listening for incoming data connections from the server on port M. It sends the FTP command PORT M to inform the server on which port it is listening. The server then initiates a data channel to the client from its port 20, the FTP server data port.In situations where the client is behind a firewall and unable to accept incoming TCP connections, passive mode may be used. In this mode, the client uses the control connection to send a PASV command to the server and then receives a server IP address and server port number from the server, which the client then uses to open a data connection from an arbitrary client port to the server IP address and server port number received.Both modes were updated in September 1998 to support IPv6. Further changes were introduced to the passive mode at that time, updating it to extended passive mode.

  • 第2题：

    The File Transfer Protocol (FTP) is a standard network protocol used for the transfer of computer （ ） between a client and server on a computer network.FTP is built on a （ ） model architecture using separate control and data connections between the client and the server. FTP users may authenticate themselves with a （ ） sign-in protocol, normally in the form of a username and password, but can connect anonymously if the server is configured to allow it. For secure transmission that protects the username and password, and encrypts the content, FTP is often secured with SSL/TLS (FTPS) or replaced with SSH File Transfer Protocol (SFTP).The first FTP client applications were （ ） programs developed before operating systems had graphical user interfaces, and are still shipped with most Windows, Unix, and Linux operating systems. Many FTP clients and automation utilities have since been developed for desktops, servers, mobile devices, and hardware, and FTP has been incorporated into productivity applications, such as HTML editors.FTP may run in （请作答此空） mode, which determines how the data connection is established. In both cases, the client creates a TCP control connection from a random, usually an unprivileged, port N to the FTP server command port 21.In active mode, the client starts listening for incoming data connections from the server on port M. It sends the FTP command PORT M to inform the server on which port it is listening. The server then initiates a data channel to the client from its port 20, the FTP server data port.In situations where the client is behind a firewall and unable to accept incoming TCP connections, passive mode may be used. In this mode, the client uses the control connection to send a PASV command to the server and then receives a server IP address and server port number from the server, which the client then uses to open a data connection from an arbitrary client port to the server IP address and server port number received.Both modes were updated in September 1998 to support IPv6. Further changes were introduced to the passive mode at that time, updating it to extended passive mode.

    A.system
    B.active
    C.passive
    D.active or passive

    答案：D
    解析：
    The File Transfer Protocol (FTP) is a standard network protocol used for the transfer of computer files between a client and server on a computer network.FTP is built on a client-server model architecture using separate control and data connections between the client and the server. FTP users may authenticate themselves with a clear-text sign-in protocol, normally in the form of a username and password, but can connect anonymously if the server is configured to allow it. For secure transmission that protects the username and password, and encrypts the content, FTP is often secured with SSL/TLS (FTPS) or replaced with SSH File Transfer Protocol (SFTP).The first FTP client applications were command-line programs developed before operating systems had graphical user interfaces, and are still shipped with most Windows, Unix, and Linux operating systems. Many FTP clients and automation utilities have since been developed for desktops, servers, mobile devices, and hardware, and FTP has been incorporated into productivity applications, such as HTML editors.FTP may run in active or passive mode, which determines how the data connection is established. In both cases, the client creates a TCP control connection from a random, usually an unprivileged, port N to the FTP server command port 21.In active mode, the client starts listening for incoming data connections from the server on port M. It sends the FTP command PORT M to inform the server on which port it is listening. The server then initiates a data channel to the client from its port 20, the FTP server data port.In situations where the client is behind a firewall and unable to accept incoming TCP connections, passive mode may be used. In this mode, the client uses the control connection to send a PASV command to the server and then receives a server IP address and server port number from the server, which the client then uses to open a data connection from an arbitrary client port to the server IP address and server port number received.Both modes were updated in September 1998 to support IPv6. Further changes were introduced to the passive mode at that time, updating it to extended passive mode.

  • 第3题：

    Which statement about the S-Series native FTP proxy is not true？（） 

    • A、 both active and passive modes FTP are supported
    • B、 by default the FTP proxy uses port 8021
    • C、 access polices may apply to native FTP traffic
    • D、 data loss prevention policies may apply to native FTP traffic
    • E、 authentication is supported in transparent mode

    正确答案:E

  • 第4题：

    When NIC teaming is used, how are Loops avoided in a virtual switch?（）

    • A、By using active / passive teaming with spanning tree on the active Iink
    • B、By using active / passive teaming with onIy the active Iink in use
    • C、By using active / activate teaming with VM utilizing both uplink ports

    正确答案:B

  • 第5题：

    A user has reported that they cannot access the company FTP site. The user states that they are using the IP address that was given to them “74200.92.105”. Which of the following is MOST likely the problem?（）

    • A、Invalid IP address
    • B、FTP program is not working
    • C、Port 21 is blocked
    • D、The FTP site is down

    正确答案:A

  • 第6题：

    How is NIC teaming configured when port channels are not in use in a Cisco Nexus 1000V?（）

    • A、active / active using spanning tree
    • B、active / active
    • C、active / passive using spanning tree
    • D、active / passive

    正确答案:D

  • 第7题：

    Deploying an operating system using WDS without a boot disk would require which of the following?（）

    • A、FTP server
    • B、PXE support
    • C、CUPS
    • D、Installation CD

    正确答案:B

  • 第8题：

    单选题
    You are the desktop administrator for Contoso, Ltd. Philippe is a user in the accounting department. Philippe reports that he is not able to download a file from an FTP server by using Internet Explorer on his Windows XP Professional computer. When Philippe attempts to access the FTP server by using the URL ftp://ftp.contoso.com, Internet Explorer displays the following error message: "The password was rejected." Philippe informs you that he has a user name and password for the FTP server, but that Internet Explorer does not prompt him to type the user name or password. You need to ensure that Philippe can access the FTP server by using Internet Explorer on his computer. Which URL should you instruct Philippe to use?（）
    A

    ftp://ftp.contoso.com/Philippe 

    B

    ftp://Philippe:password@ftp.contoso.com

    C

    ftp://Philippe/ftp.contoso.com 

    D

    ftp://ftp.contoso.com@Philippe:password


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    When NIC teaming is used ,how are loops avoided in a virtual switch?（）
    A

    By using active / passive teaming with spanning tree on the active link

    B

    By using active / passive teaming with only the active link in use

    C

    By using active / active teaming with VM utilizing both uplink ports


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    An operator needs to transfer several files in the same directory using ftp without being prompted. Which of the following ftp subcommands must be used?（）
    A

    int put *

    B

    int mput *

    C

    prompt put *

    D

    prompt mput *


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    Using FTP passive mode， after the client opens thecommand channel （port 21） to the FTP server and requests passive mode， what will be the next step？ （）
    A

     The FTP server sends back an acknowledgment （ACK） to the client

    B

     The FTP server allocates a port touse for the data channel and transmit that port number to the client

    C

     The FTP server opens the data channel to the client using the port number indicated by the client

    D

     The FTP client opens the data channel to the FTP server on Port 20

    E

     The FTP client opens the datachannel to the FTP server on Port 21


    正确答案： B
    解析： 暂无解析

  • 第12题：

    多选题
    You are using IPv6， and would like to configure EIGRPv3. Which three of these correctly describe how you can perform this configuration？（）
    A

    EIGRP for IPv6 is directly configured on the interfaces over which it runs.

    B

    EIGRP for IPv6 is not configured on the interfaces over which it runs， but if a user uses passive-interface configuration， EIGRP for IPv6 needs to be configured on the interface that is made passive.

    C

    There is a network statement configuration in EIGRP for IPv6， the same as for IPv4.

    D

    There is no network statement configuration in EIGRP for IPv6.

    E

    When a user uses a passive-interface configuration， EIGRP for IPv6 does not need to be configured on the interface that is made passive.

    F

    When a user uses a non-passive-interface configuration， EIGRP for IPv6 does not need to be configured on the interface that is made passive


    正确答案： A,E
    解析： 暂无解析

  • 第13题：

    The File Transfer Protocol (FTP) is a standard network protocol used for the transfer of computer （ ） between a client and server on a computer network.FTP is built on a （ ） model architecture using separate control and data connections between the client and the server. FTP users may authenticate themselves with a （ ） sign-in protocol, normally in the form of a username and password, but can connect anonymously if the server is configured to allow it. For secure transmission that protects the username and password, and encrypts the content, FTP is often secured with SSL/TLS (FTPS) or replaced with SSH File Transfer Protocol (SFTP).The first FTP client applications were （请作答此空） programs developed before operating systems had graphical user interfaces, and are still shipped with most Windows, Unix, and Linux operating systems. Many FTP clients and automation utilities have since been developed for desktops, servers, mobile devices, and hardware, and FTP has been incorporated into productivity applications, such as HTML editors.FTP may run in （ ） mode, which determines how the data connection is established. In both cases, the client creates a TCP control connection from a random, usually an unprivileged, port N to the FTP server command port 21.In active mode, the client starts listening for incoming data connections from the server on port M. It sends the FTP command PORT M to inform the server on which port it is listening. The server then initiates a data channel to the client from its port 20, the FTP server data port.In situations where the client is behind a firewall and unable to accept incoming TCP connections, passive mode may be used. In this mode, the client uses the control connection to send a PASV command to the server and then receives a server IP address and server port number from the server, which the client then uses to open a data connection from an arbitrary client port to the server IP address and server port number received.Both modes were updated in September 1998 to support IPv6. Further changes were introduced to the passive mode at that time, updating it to extended passive mode.

    A.command-line
    B.graphical
    C.automation
    D.productivity

    答案：A
    解析：
    The File Transfer Protocol (FTP) is a standard network protocol used for the transfer of computer files between a client and server on a computer network.FTP is built on a client-server model architecture using separate control and data connections between the client and the server. FTP users may authenticate themselves with a clear-text sign-in protocol, normally in the form of a username and password, but can connect anonymously if the server is configured to allow it. For secure transmission that protects the username and password, and encrypts the content, FTP is often secured with SSL/TLS (FTPS) or replaced with SSH File Transfer Protocol (SFTP).The first FTP client applications were command-line programs developed before operating systems had graphical user interfaces, and are still shipped with most Windows, Unix, and Linux operating systems. Many FTP clients and automation utilities have since been developed for desktops, servers, mobile devices, and hardware, and FTP has been incorporated into productivity applications, such as HTML editors.FTP may run in active or passive mode, which determines how the data connection is established. In both cases, the client creates a TCP control connection from a random, usually an unprivileged, port N to the FTP server command port 21.In active mode, the client starts listening for incoming data connections from the server on port M. It sends the FTP command PORT M to inform the server on which port it is listening. The server then initiates a data channel to the client from its port 20, the FTP server data port.In situations where the client is behind a firewall and unable to accept incoming TCP connections, passive mode may be used. In this mode, the client uses the control connection to send a PASV command to the server and then receives a server IP address and server port number from the server, which the client then uses to open a data connection from an arbitrary client port to the server IP address and server port number received.Both modes were updated in September 1998 to support IPv6. Further changes were introduced to the passive mode at that time, updating it to extended passive mode.

  • 第14题：

    FTP需要建立（请作答此空）个连接，当工作于PASSIVE模式时，其数据连接的端口号是（ ）。

    A.1
    B.2
    C.3
    D.4

    答案：B
    解析：
    FTP工作时，需要建立2个连接，一个是命令连接，一个是数据连接。并且FTP支持两种模式
    　　（1） Standard模式（PORT模式）
    　　Standard模式是FTP的客户端发送 PORT 命令到FTP服务器。FTP 客户端首先和FTP服务器的TCP 21端口建立连接，通过这个连接发送命令，客户端需要接收数据的时候在这个连接上发送PORT命令， 其中包含了客户端用于接收数据的端口。服务器端通过自己的TCP 20端口连接至客户端指定的端口建立数据连接发送数据。
    　　（2） Passive模式（PASV模式）
    　　Passive模式是FTP的客户端发送 PASV 命令到 FTP 服务器。在建立控制连接的时候和Standard模式类似，但建立连接后发送的不是PORT命令，而是PASV命令。FTP服务器收到 PASV 命令后，随机打开一个高端端口（端口号大于1024）并且通知客户端在这个端口上传送数据，客户端连接FTP服务器此端口（非20）建立数据连接进行数据的传送。

  • 第15题：

    对于FTP下面哪两个描述正确（）？

    • A、在PASSIVE方式下，客户端口初始化控制通道TCP连接的建立，而数据通道由服务器初始化
    • B、在PASSIVE模式下，控制通道和数据通道都有客户端来初始化TCP连接的建立
    • C、在PASSIVE模式下，服务器端的控制通道使用21号TCP端口，数据通道使用20号TCP端口
    • D、在PASSIVE模式下，服务器端的控制通道使用21号TCP端口，而数据通道使用临时的TCP端口

    正确答案:B,D

  • 第16题：

    FTP需要建立两个连接，当工作于PASSIVE模式时，其数据连接的端口号是（）。

    • A、20
    • B、21
    • C、由用户确定的一个整数
    • D、由服务器确定的一个整数

    正确答案:D

  • 第17题：

    在Unix系统中，FTP服务软件一般不提供那种登录方式（）。

    • A、Anonymous FTP
    • B、Real FTP
    • C、Passive FTP
    • D、Guest FTP

    正确答案:C

  • 第18题：

    When using IP SLA FTP operation， which two FTP modes are supported？ （）

    • A、Only the FTP PUT operation type is supported.
    • B、Active mode is supported.
    • C、Passive FTP transfer modes are supported.
    • D、FTP URL specified for the FTP GET operation is not supported.

    正确答案:B,C

  • 第19题：

    You are the desktop administrator for Contoso, Ltd. Philippe is a user in the accounting department. Philippe reports that he is not able to download a file from an FTP server by using Internet Explorer on his Windows XP Professional computer. When Philippe attempts to access the FTP server by using the URL ftp://ftp.contoso.com, Internet Explorer displays the following error message: "The password was rejected." Philippe informs you that he has a user name and password for the FTP server, but that Internet Explorer does not prompt him to type the user name or password. You need to ensure that Philippe can access the FTP server by using Internet Explorer on his computer. Which URL should you instruct Philippe to use?（） 

    • A、ftp://ftp.contoso.com/Philippe 
    • B、ftp://Philippe:password@ftp.contoso.com
    • C、ftp://Philippe/ftp.contoso.com 
    • D、ftp://ftp.contoso.com@Philippe:password

    正确答案:B

  • 第20题：

    多选题
    When using IP SLA FTP operation，which two FTP modes are supported？（）
    A

    Only the FTP PUT operation type is supported.

    B

    Active mode is supported.

    C

    Passive FTP transfer modes are supported.

    D

    FTP URL specified for the FTP GET operation is not supported.


    正确答案： C,D
    解析： 暂无解析

  • 第21题：

    多选题
    Which three actions must you perform as part of the WXOS software upgrade process?（）(Choose three.)
    A

    Reboot the device.

    B

    Reapply the license key.

    C

    Save the current configuration.

    D

    Load the image using FTP, TFTP, or from the local disk.

    E

    Back up the configration using FTP, TFTP, or to the local disk


    正确答案： A,D
    解析： 暂无解析

  • 第22题：

    单选题
    Deploying an operating system using WDS without a boot disk would require which of the following？（）
    A

     FTP server

    B

     PXE support

    C

     CUPS

    D

     Installation CD


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    Which statement about the S-Series native FTP proxy is not true？（）
    A

     both active and passive modes FTP are supported

    B

     by default the FTP proxy uses port 8021

    C

     access polices may apply to native FTP traffic

    D

     data loss prevention policies may apply to native FTP traffic

    E

     authentication is supported in transparent mode


    正确答案： A
    解析： 暂无解析

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