What scenarios do you know for using the UDP protocol and can you give examples?

UDP (User Datagram Protocol) is used in cases where speed of data transmission is important and some packet loss is acceptable, since UDP does not guarantee delivery and message order. Typical scenarios for using UDP:

• Video conferencing and VoIP: for transmitting audio and video in real-time, where delays are more critical than losing individual packets.
• Online gaming: fast exchange of game data, where minimal latency is important.
• DNS queries: quick requests to domain name servers, where small packet loss is compensated by re-requesting.
• Media streaming (streaming): for example, IPTV, where speed and streaming are important.

Example: DNS queries usually use UDP because it allows quick responses without establishing a connection.

The client sends a DNS request to the server via UDP, the server responds, and no connection is established, reducing delays.