What is UDP Lite?

UDP Lite is a very efficient version of UDP. UDP may have a checksum. If it does use a checksum and a single bit is off, the checksum won’t match and the entire datagram will be discarded.
UDP Lite takes a different approach. It uses a partial checksum. This means that the checksum covers only an area of the payload marked as ‘sensitive’. If a bit changes in the ‘insensitive’ area, the UDP segment is still delivered as normal.
This is used with voice and video traffic, which will usually have advanced codecs to detect problems and conceal or repair them.

Overview of this video:

0:00 Introduction

0:18 UDP Lite

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