UDP (User Datagram Protocol) is a connectionless transport layer protocol that sends data without establishing a connection, making it fast but unreliable.

Elaboration:

• No handshake mechanism, unlike TCP, so data may be lost.
• Used in applications where speed is more critical than reliability (e.g., live streaming, VoIP, gaming).
• Works on port 53 (DNS), port 67/68 (DHCP), port 161 (SNMP), etc.

Example:

Online multiplayer games like PUBG or Fortnite use UDP for real-time data transmission.

Code Example: (Simple UDP Server)

pythonCopyEditimport socket

server = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
server.bind(("0.0.0.0", 12345))
data, addr = server.recvfrom(1024)
print(f"Received {data} from {addr}")