File Transfer Protocol(FTP) is used to send files between computers connected to a web link.
It is an tool-level protocol that uses theInternet protocol suite, also known as TCP/IP.
You also use FTP to download files from the internet to your box.
The default command port number that an FTP server listens on is 21.
Port number 20 is used for data transfer over FTP.
An FTP server would generally require you to authenticate with a username and password.
The server may also be configured to make certain or all files available via anonymous connections.
TLS/SSL are cryptographic protocols for secure communication over computer networks.
They are based on the exchange of X.509 certificates and public keys for encrypting and decrypting messages.
Digital certificates are issued by a certificate authority (CA) trusted by both parties involved in the communication.
If the file server uses TLS/SSL security, it is also important to monitor the certificate expiration date.
