FTP is used to transfer files between local clients and remote servers.
As devices operate stably and are deployed on a large scale, more and more devices need to be maintained and upgraded remotely. Online software upgrade, a new upgrade method by loading software packages remotely, facilitates remote online upgrades, reduces upgrade expenditures, shortens the time that customers wait for upgrades, and improves customers' satisfaction. The delay, packet loss, and jitter affect data transmission on networks. To ensure the quality of online upgrade and data transmission, use FTP to perform online upgrades and transfer files based on TCP connections.
Use the SFTP protocol because this protocol is not secure.