What is the difference between UDP and TCP internet

Nov 21, 2019 Using UDP in Internet of Things Devices - Cardinal Peak Mar 19, 2014 UDP Scan (-sU) | Nmap Network Scanning

Network Basics: User Datagram Protocol (UDP) - dummies

Jul 30, 2016 NMAP PING and UDP Scanning | Linux.org Now for the User Datagram Protocol (UDP) scan. The UDP scan is very essential for Network Administrators to perform. Most malware/spyware on systems which access the Internet use a UDP Port. UDP Ports are not usually monitored because few systems use UDP. Once a UDP Port is opened, the malware is placed on the system through the opened port. c# - UDP Multicast over the internet? - Stack Overflow

While most popular services on the Internet run over the TCP protocol, UDP services are widely deployed. DNS, SNMP, and DHCP (registered ports 53, 161/162, and 67/68) are three of the most common. Because UDP scanning is generally slower and more difficult than TCP, some security auditors ignore these ports.

It is still an accepted assumption that most Internet traffic is transmitted via the TCP protocol. However, the rise of new streaming applications and P2P protocols that try to avoid traffic shaping techniques will likely increase the use of UDP as a transport protocol. We evaluate the amount of UDP and TCP traffic, in terms of flows, packets and bytes, on traces collected in the period 2002 UDP Speed Test