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Which network protocol uses port 21?
The network protocol that uses port 21 is FTP (File Transfer Protocol). FTP is commonly used for transferring files between a client and a server on a computer network. Port 21 is specifically designated for FTP control connections. When a user initiates an FTP connection, the client connects to the server's port 21 to establish communication for sending and receiving files. It is important to note that FTP operates in two modes: active mode and passive mode, each using different ports for data transfer.
What type of telecommunications hardware allows you to access the web?
Ftp
An Internet server is running both FTP and HTTP services. How does the server know which of these applications should handle an incoming segment?
If I understand the question aright; different port numbers are used to identify different protocols. Port numbers between 1 and 1023 are well-known numbers and standards define which protocol uses which. FTP uses port number 21, HTTP uses port 80.
What is Cute FTP?
Cute FTP is a FTP client (used to connect to a server). FTP is a point-to-point protocol used for file transfert (FTP meaning File Transfert Protocol).
What does FTP correspond to?
FTP is File Transfer Protocol. It is the protocol used on the internet when you upload files or download files. So for example, if you create a webpage and you want to upload it to your webspace, you need to use an FTP program. There are lots of good one out there. If you use Firefox, you can get an add-on called FireFTP. You would need to get the details of where to connect to in order to get access to your webspace. You will get those on your internet providers webspace. You then set the appropriate settings in the FTP program to enable the connection to be made.
How do you check ftp port on Linux?
The FTP port has been standardized at port 21, so it is highly unlikely it is operating on another port. To change the port, you would have had to change configuration settings. And if you had, you would know what port it was on.
What port does ftp use?
Generally port 21 is for FTP 22 for FTP using SSH 990 FTP using SSL
What port must be open to send documents over FTP?
The default FTP port is 21. But most FTP server software allows you to set which ever port you want.
If you have decided to change FTP port number on the server from its default number 23 for better security what will be the result of this change?
Students and professors will be unable to Telnet to the server or FTP files to or from the server
What port FTP use?
port 21
What is the default FTP port number?
Implicit FTPS runs on port 990 by default.
How do you change the Windows XP FTP port?
This actually doesn't make a whole lot of sense. If your trying to listen in on an FTP port, then it's 21. If you are running an FTP server, then the option is in your software. If you are just trying to connect to an FTP server on a non-standard port than using a colon and the port after the host will work fine. If your question is referring to allowing another port into the built-in firewall, then just add a port and call it what you want. If you could provide me with more information I might be able to help you further.
What is port no for ftp?
21
Port 23 is FTP port?
Only in Montenegro (ME)
Which of the following ports would Windows Firewall need to make an exception for in order to allow FTP access?
port 21
What is the purpose for port 20?
TCP port 20 is used by FTP (File Transfer Protocol) for data transfer. FTP also uses port 21.
What ports need to be open for the client to use the FTP client software?
FTP is a TCP based service exclusively. There is no UDP component to FTP. FTP is an unusual service in that it utilizes two ports, a 'data' port and a 'command' port (also known as the control port). Traditionally these are port 21 for the command port and port 20 for the data port. The confusion begins however, when we find that depending on the mode, the data port is not always on port 20. In active mode FTP the client connects from a random unprivileged port (N > 1023) to the FTP server's command port, port 21. Then, the client starts listening to port N+1 and sends the FTP command PORT N+1 to the FTP server. The server will then connect back to the client's specified data port from its local data port, which is port 20. From the server-side firewall's standpoint, to support active mode FTP the following communication channels need to be opened: * FTP server's port 21 from anywhere (Client initiates connection) * FTP server's port 21 to ports > 1023 (Server responds to client's control port) * FTP server's port 20 to ports > 1023 (Server initiates data connection to client's data port) * FTP server's port 20 from ports > 1023 (Client sends ACKs to server's data port) In order to resolve the issue of the server initiating the connection to the client a different method for FTP connections was developed. This was known as passive mode, or PASV, after the command used by the client to tell the server it is in passive mode. In passive mode FTP the client initiates both connections to the server, solving the problem of firewalls filtering the incoming data port connection to the client from the server. When opening an FTP connection, the client opens two random unprivileged ports locally (N > 1023 and N+1). The first port contacts the server on port 21, but instead of then issuing a PORT command and allowing the server to connect back to its data port, the client will issue the PASV command. The result of this is that the server then opens a random unprivileged port (P > 1023) and sends the PORT P command back to the client. The client then initiates the connection from port N+1 to port P on the server to transfer data. From the server-side firewall's standpoint, to support passive mode FTP the following communication channels need to be opened: * FTP server's port 21 from anywhere (Client initiates connection) * FTP server's port 21 to ports > 1023 (Server responds to client's control port) * FTP server's ports > 1023 from anywhere (Client initiates data connection to random port specified by server) * FTP server's ports > 1023 to remote ports > 1023 (Server sends ACKs (and data) to client's data port)
