This course discusses architectures, protocols and techniques to measure Internet traffic and manage Internet systems. The architectures that are discussed range from the simplistic manager-agent model, to more advanced distributed management models. The discussion on protocols includes the Simple Network Management Protocol (SNMP) and the Network Configuration (NetConf) protocol. The operation of routers, switches and other Internet systems can be monitored and modified via so-called managed objects, which are organized within Management Information Bases (MIBs). This course gives an overview of the most important MIBs (MIB-2, IF-MIB, IP-MIB, RMON and the Host resources MIB), as well as the syntax to define these MIBs (SMI). The course concludes with an overview of traffic measurement techniques.