Common Applications that Use UDP:

Real-Time Communication: Applications like VoIP (Voice over Internet Protocol) and video conferencing services utilize UDP for real-time audio and video transmission due to its low latency and faster speed.

Online Gaming: Multiplayer online games often rely on UDP for its speed and efficiency in transmitting real-time game data, such as player movements, actions, and updates.

Streaming Services: Live video streaming platforms, like YouTube Live and Twitch, leverage UDP for delivering live video content to users with minimal delay and smooth playback.

DNS (Domain Name System): DNS queries and responses use UDP for their lightweight and fast nature, enabling quick domain name resolution without the need for connection establishment.

IoT (Internet of Things) Devices: IoT devices that require fast communication, such as sensors and smart devices, can benefit from using UDP for transmitting small packets of data efficiently.

Network Monitoring: UDP is commonly used for network monitoring tools like SNMP (Simple Network Management Protocol) to collect network performance data without the overhead of TCP connections.

Common Applications that Use TCP:

Web Browsing: HTTP, the protocol used for web browsing, relies on TCP for reliable data delivery, ensuring that web pages load correctly and in the correct order.

Email Services: SMTP (Simple Mail Transfer Protocol) for sending emails and IMAP/POP3 for retrieving emails all use TCP to guarantee that email data is delivered accurately and reliably.

File Transfer: FTP (File Transfer Protocol) and SFTP (Secure File Transfer Protocol) utilize TCP for transferring files securely and ensuring that files are delivered without errors.

Remote Desktop Access: Protocols like RDP (Remote Desktop Protocol) and VNC (Virtual Network Computing) use TCP for remote desktop access to ensure a stable and reliable connection.

Secure Communication: HTTPS, the secure version of HTTP, relies on TCP for encrypted data transmission, providing secure communication for online transactions, sensitive data transfers, and secure browsing.

Database Access: Database systems like MySQL, PostgreSQL, and Oracle use TCP for client-server communication to ensure reliable data transfer and integrity when querying and updating databases.

By understanding the differences between UDP and TCP and recognizing the specific strengths and weaknesses of each protocol, developers can choose the appropriate protocol based on the requirements of the application or service to achieve optimal performance and reliability in data transmission.