What is best effort protocol tcp or udp?

UDP is considered a best-effort protocol because it does not guarantee delivery, ordering, or error correction, allowing for faster transmission suited for applications like streaming or gaming where speed is prioritized over reliability. In contrast, TCP is a reliable protocol that ensures data delivery, correct ordering, and error recovery, making it ideal for applications requiring data integrity, such as file transfers and web browsing. Ultimately, the choice between TCP and UDP depends on the specific requirements of the application.