What are the rules that govern sending and receiving files on the internet?

The rules governing sending and receiving files on the internet primarily involve protocols that ensure data integrity, security, and proper transmission. Key protocols include TCP/IP for establishing connections and managing data transfer, HTTP/HTTPS for web-based file transfers, and FTP/SFTP for file sharing. Additionally, there are legal and ethical considerations, such as respecting copyright laws, privacy regulations, and adhering to terms of service. Users should also ensure that files are scanned for malware to protect systems and networks.