Which characteristic best describes UDP in network communications?
Uses handshaking protocols
Reliable and connection-oriented
Connectionless and best-effort delivery
Encrypted by default
UDP is known for its connectionless nature, meaning it does not require a connection to be established before sending data between devices. This makes UDP suitable for situations where speed is more critical than reliability. In contrast, 'Reliable and connection-oriented' describes TCP, not UDP. 'Uses handshaking protocols' also refers to TCP, which establishes a connection before data transmission. 'Encrypted by default' is incorrect as UDP does not provide encryption inherently; it relies on application-layer protocols for security.
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