![]() On wired networks, depending on the type and configuration of switches used, packet sniffers will have access to all or a segment of the information that is being exchanged. Wireshark is a popular open-source packet-sniffing program. ![]() They can be bought as specialized hardware or as software that is installed on computers and uses the host device’s network interface to monitor network traffic. Packet sniffers, also known as packet or protocol analyzers, are tools that can intercept and log the traffic running on the networks they’re connected to. While your information travels through the veins of your local network and the internet, it can be picked up by packet sniffers. However, you and the receiving end are not the only parties that will have access to the data. When you compose an email and press send, type in the URL of a website in your browser, or post a new update in your social media app, your information is broken down into packets of data and sent to its destination, whether it’s a computer in the next room or a server sitting in a data center thousands of miles away.
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