In this video, Lisa Bock review requirements for Wireshark VoIP, an intermediate course for anyone with an interest in learning about packet analysis and the importance of understanding and identifying the traffic on your network to troubleshoot and identify latency issues.
- [Instructor] Wireshark voice over IP is an intermediate course for network administrators, students, teachers, and anyone with an interest in learning more about packet analysis and the importance of identifying the traffic on your network, to troubleshoot and identify latency issues. Although most of you have been using Wireshark for many years, I wanted to take a few minutes and explain using Npcap with Wireshark.
When installing Wireshark the software will make sure that the user has installed WinPcap, the capture engine for Windows. WinPcap is an industry standard that has been around for many years. However, it has not had any recent updates and as a result it may not perform well on certain versions of Windows 10 and above. To overcome performance issues, users are directed to use Npcap, as it might perform better.
Npcap comes from the Nmap project and is the packet smithing library for Windows. Nmap is based on WinPcap, LIBpcap, but has improved features for enhanced ability to capture. And I'll scroll down here and here you can see a little bit more information about Npcap. Now here is where you can download and install Npcap. Now, when you're taking a look at this, the Wireshark documentation supports this as well.
Now, what I would suggest is that you install Npcap first, and then install Wireshark. But if you're like me and you already have Wireshark installed, then you might have better results if you uninstall Wireshark and WinPcap and then install Npcap, and then install Wireshark. So I've downloaded and now we can begin that. And then I'm also going to show you, at Wireshark.org, the Windows installer. So you want to get a fresh version of both Npcap and Wireshark.
So I've opened up the installer and we begin by saying I agree. And then, as you can see, the installation options, there are some other nice features as you can see. Here you can say, automatically start the driver at boot time. Support loopback traffic, and this is also a nice feature, restrict Npcap driver access to administrators only, and other features such as support raw 802.11 traffic, and I'll select that, and then I'll begin my install.
Now it's installed and we'll finish the installation. Then the next thing I'll do is install Wireshark. Now we get to the part where it asks about packet capture. And as you can see, it says currently installed Npcap version and it is already installed. You could install WinPcap, they are compatible, but I'm going to go on to the next step.
This is an option if you want to install USBPcap, and at this point I'm not going to install it, but you could. Okay, great, now we're ready to start. So throughout this course we're going to examine precaptured packets, and mainly from online repositories. Now, high-level knowledge and networking technology's going to help to clarify some of the concepts discussed in this course.
However, if you have a basic understanding of networking terms and concepts and an interest in the subject, you should be able to follow along with the lessons.
- Voice over IP (VoIP) and Unified Communications
- Digitizing a signal
- VoIP components
- Protocols used by VoIP, including TCP/IP and DHCP
- Connecting systems
- Gateways and gatekeepers
- Factors that might affect quality on a VoIP network
- Wireshark statistics