UDP does not deal with fragmentation as it is a transport layer protocol that is also connectionless. Fragmentation is the responsibility of the lower layer protocols such as the internet protocol (IP) which uses fragmentation to break down large packets into smaller ones that can be transmitted across a network. However, excessive fragmentation can impact network performance and increase the likelihood of packet loss. To mitigate this, it is recommended to use a maximum transmission unit (MTU) size that is appropriate for the network to avoid excessive fragmentation.
