Computer network and web technicians (NOC 22220) in Canada are responsible for setting up, operating, maintaining, and coordinating the use of local and wide area networks (LANs and WANs), mainframe networks, hardware, software, and related computer equipment. They also diagnose and resolve problems in network and internet systems, ensuring the smooth functioning of these critical components in various organizations, including private businesses, government agencies, and other establishments. These technicians play a vital role in maintaining the connectivity and performance of computer network systems.