From the course: Protecting Your Network with Open Source Software
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Packet capturing with Wireshark
From the course: Protecting Your Network with Open Source Software
Packet capturing with Wireshark
- [Narrator] Wireshark is one of the most well-known packet or protocol analysis software. This type of software is also called packet sniffer because it collects and inspect packets like dogs sniffing for evidence in a crime scene. In this lesson, our goal is to observe three-way handshaking, using Wireshark. Transmission control protocol or TCP, is a connection oriented protocol that ensures packets are error-free, and in sequence on the receiving side. For TCP to establish a reliable connection, it has to go through this process called three-way handshaking. The process consists of three steps, which is why it's called three-way handshaking. The first one is SYN or synchronize. The second one is SYN/ACK or synchronize and acknowledge. And finally ACK or acknowledge. Here is a diagram that shows how three-way handshaking occurs. When starting your Wireshark instance, remember that you're running it as root. The…
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