1. No Reliability: UDP does not guarantee that the packets will reach their destination. Packets may be dropped, or they may be delivered out of order. This can result in data loss or corruption, making UDP unsuitable for applications that require high reliability.
1. No Congestion Control: UDP does not have built-in congestion control mechanisms. This means that if the network becomes congested, UDP packets will continue to be sent, leading to further congestion and potential packet loss.
1. No Flow Control: UDP does not have built-in flow control mechanisms. This means that UDP packets may be sent faster than the receiver can handle, leading to potential packet loss or other performance issues.
1. No Error Checking: UDP does not perform error checking on received packets. If a packet contains errors, the receiving application will not be notified, and the packet will be discarded.
1. Limited Fragmentation Support: UDP does not support fragmentation of packets. This means that large packets may need to be broken up before being sent, which can add additional overhead and potentially result in performance issues.
1. Vulnerable to DDoS Attacks: UDP is vulnerable to Distributed Denial of Service (DDoS) attacks, where an attacker floods a network with a large number of UDP packets, overwhelming the network and causing it to become unusable.
