FTP Server通常使用那一个服务通道（port）？（）A、13B、25C、98D、21
FTP Server通常使用那一个服务通道（port）？（）
- A、13
- B、25
- C、98
- D、21
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
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
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.
You are the network administrator for your company.You work in the company’s branch office in Chicago. The network in your office consists of 40 Windows XP Professional desktop computers and one Windows Server 2003 computer named Server1. Server1 connects to the Internet through a 512-Kbps leased line. The main office of the company is in Seattle.Users of the desktop computers in the Chicago office are developers who are developing a new software product. You want these users to place daily builds of the product in a shared folder on Server1. You want developers in the Seattle office to be able to download the daily builds from Server1 by using FTP.You install IIS on Server1 and configure the FTP site so that it is available to the developers in the Seattle office. However， when you monitor inbound Internet connection attempts to Server1， you notice many attempted HTTP connections.You want to secure Server1 so that it is not susceptible to malicious Internet users. Server1 must also connect to the Internet to use Windows Update and to download virus definition updates. You do not want to purchase additional hardware or software. What should you do on Server1？（）A、Enable Internet Connection Sharing （ICS）.B、Configure port filtering on the network adapter to allow only TCP port 80 and TCP port 21.C、Enable Internet Connection Firewall （ICF） and create a service setting in the Internet Connection Firewall settings that allows Internal and external TCP port 21 to Server1 internal and external TCP port 80 to Server1D、Enable Internet Connection Firewall （ICF） and select the FTP Server check box in the Services tab. Enter Server1 as the server hosting the FTP services.
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FTP Server通常使用那一个服务通道（port）？（）A13B25C98D21