Lisa Bock provides an overview of 802.11 and discusses the two frequencies used, 2.4GHz and 5GHz, the three types of frames used, along with the different modes on a wireless network, master, managed, ad hoc, and monitor.
- [Instructor] 802.11, or WiFi,…operates in Layers 1 and 2 of the OSI model.…There are two types of signals,…and these are based on frequency.…2.4 gigahertz covers longer distance, but at slower speeds,…and the five gigahertz covers shorter distance,…but offers faster speeds.…This chart, I wanted to show you…the different variants in the 802.11 family.…We see, a, b, g, n, and ac.…
What you'll want to do is just check your adapter…to see which ones your adapter will accept.…And here is mine, and as you can see,…my adapter will accept all forms of 802.11.…In the US, wireless b, g, and n is available on 11 channels.…In that range only three channels are non-overlapping,…that's 1, 6, and 11,…so you have to take care as to how you set them up…in your wireless access points so they're non-overlapping.…
a and n is available on 24 channels,…and all 24 channels are non-overlapping.…But what about ac?…Well, I wanted to show you this image at this website,…and it talks about the different wireless standards.…Now, you can see all the back, in 1999,…
- Tapping into the network
- Baselining the network
- Troubleshooting to discover the cause of a slow network
- Merging traffic
- Sanitizing packet captures
- Capture engines
- Optimizing packet captures
- Basic and advanced IO graphs
- TCP stream graphs
Skill Level Intermediate
Troubleshooting Your Network with Wireshark (2015)with Lisa Bock2h 35m Intermediate
Learning Cryptography and Network Securitywith Lisa Bock1h 45m Intermediate
Enhance your skills1m 5s
1. Tapping into the Stream
2. Solving Network Problems
3. Capture Engines and Wi-Fi
4. Command Line Capture
5. IO and Stream Graphs
What's next?1m 13s
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