单选题FTP Server通常使用那一个服务通道（port）？（）A13B25C98D21
单选题
FTP Server通常使用那一个服务通道（port）？（）
A
13
B
25
C
98
D
21
参考解析
解析：
暂无解析
相关考题：
在路由器上启动FTP服务，要执行哪条命令：（ ）A.ftp-server openB.ftp-server enableC.ftp server openD.ftp server running
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-serverB.user- serverC.client-serverD.business -customer
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-lineB.graphicalC.automationD.productivity
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 touse for the data channel and transmit that port number to the clientC、 The FTP server opens the data channel to the client using the port number indicated by the clientD、 The FTP client opens the data channel to the FTP server on Port 20E、 The FTP client opens the datachannel to the FTP server on Port 21
在路由器上启动FTP服务，要执行哪条命令？（）A、ftp-server openB、ftp-server enableC、ftp serve ropenD、ftp server running
FTP有两种工作模式，其中一种为port模式，另外一种为passive模式，下列对两种模式的不同之处描述正确的是（）A、port模式的数据通道连接由服务器端向客户端发起B、passive模式的数据通道连接由服务器端向客户端发起C、port模式的数据通道连接由客户端向服务器端发起D、passive模式的数据通道连接由客户端向服务器端发起
在路由器上启动FTP服务，要执行哪条命令：（）A、ftp-server openB、ftp-server enableC、ftp server openD、ftp server running
FTP有两种工作模式，其中一种为port模式，另外一种为passive模式，下列对两种模式的不同之处描述正确的是：（）A、passive模式的数据通道连接由服务器端向客户端发起B、port模式的数据通道连接由服务器端向客户端发起C、port模式的数据通道连接由客户端向服务器端发起
以下FTP的主动传输和FTP的被动传输说法正确的是（）。A、FTP的主动传输模式由FTP客户端主动向服务器建立数据连接B、FTP的主动传输模式由FTP服务器主动向客户端建立数据连接C、FTP的被动传输模式的服务器及客户端均采用临时端口建立数据连接D、FTP的被动传输模式使用PORT命令E、FTP的被动传输模式使用PASV命令
You are creating a shared Internet connection on your Windows 2000 Professional computer. You want to enable other computers on the LAN to be able to access only HTTP and FTP sites on the Internet. What should you do?（）A、Configure your shared Internet connection to disable LCP extensions.B、Configure you shared Internet connection to disable on-demand dialing.C、Create an Internet Connection Sharing application type for HTTP to use remote server port 25.D、Create an Internet Connection Sharing application type for HTTP to use remote server port 80.E、Create an Internet Connection Sharing application type for FTP to use remote server port 21.F、Create an Internet Connection Sharing application type for FTP to use remote server port 72.
多选题You are creating a shared Internet connection on your Windows 2000 Professional computer. You want to enable other computers on the LAN to be able to access only HTTP and FTP sites on the Internet. What should you do?（）AConfigure your shared Internet connection to disable LCP extensions.BConfigure you shared Internet connection to disable on-demand dialing.CCreate an Internet Connection Sharing application type for HTTP to use remote server port 25.DCreate an Internet Connection Sharing application type for HTTP to use remote server port 80.ECreate an Internet Connection Sharing application type for FTP to use remote server port 21.FCreate an Internet Connection Sharing application type for FTP to use remote server port 72.
单选题You create a shared Internet connection on a Windows 2000 Professional computer. Your network has 10 users on the LAN. All of the users can connect to HTTP sites， FTP sites， and streaming audio content on the Internet. One of the computers on your LAN is running an FTP host application. Users on the Internet cannot connect to the FTP host on your network. What should you do？（）AConfigure the FTP host to accept incoming requests on service port 80.BConfigure an Internet Connection Sharing application type for FTP to use remote server port 23.CConfigure an Internet Connection Sharing service type for FTP use service port 21 on the FTP host computer.DConfigure an Internet Connection Sharing service type for FTP use service port 23 on the FTP host computer.
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 clientB The FTP server allocates a port touse for the data channel and transmit that port number to the clientC The FTP server opens the data channel to the client using the port number indicated by the clientD The FTP client opens the data channel to the FTP server on Port 20E The FTP client opens the datachannel to the FTP server on Port 21
单选题FTP Server通常使用那一个服务通道（port）？（）A13B25C98D21