If you accidentally answer a spam call, scammers know your number is connected to a real person and can target you with more spam calls. These targeted spam calls will try to trick you into giving up your personal information which allows cybercriminals to steal your money, your identity and even your voice. You should avoid answering spam calls to help prevent cybercriminals from trying to steal your personal information.

In the previous post, we’ve discussed how passive OS identification can be done based on different network protocols. We’ve also used the OSI model to categorize the different indicators and prioritize them based on reliability and granularity. In this post, we will focus on the network and transport layers and introduce a machine learning OS identification model based on TCP/IP header values.