Either replace the existing switch (not advises as you need to make changes to the wiring or spend a lot of money if you have a switch with many ports) or add (better) a new switch with mirroring capabilities.In order to monitor Internet traffic we need to hook a probe where this traffic flows and thus we need to make some changes to the topology as shown in red in the figure below. In order to monitor LAN traffic, the best solution is to replace the current switch with one that supports sFlow however most people do not pay too much attention to what happens in the LAN but they rather focus on Internet traffic monitoring as this is the place where threats and slowdown happen. xDSL or fibre) that usually also features an embedded access point used by phones, tablets or laptops to connect to the Internet. The ISP provides a router for connecting to the Internet (e.g. The typical network layout of a home or a small business is depicted below. Today we analyse network traffic in SMEs and home networks. In the first part of this series of articles, we focused on monitoring ISPs and MSP traffic.
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