Where is UDP best applied?

UDP is best used in cases where speed of data transmission is important and packet loss is acceptable, as well as when minimal latency and protocol simplicity are required.

Typical scenarios for using UDP:

• Video conferencing and streaming, where small losses are not critical.
• Online gaming, where response speed is important.
• DNS queries.
• Device discovery protocols in networks.

In Go, the net package is used for working with UDP:

conn, err := net.ListenPacket("udp", ":12345")
if err != nil {
    // handle error
}
defer conn.Close()

buf := make([]byte, 1024)
n, addr, err := conn.ReadFrom(buf)
// handle data

UDP does not guarantee delivery, order, or integrity, so it should be used when these requirements are not critical or are handled at the application level.