No video
802.11 Wireless part 5: Sending data in the DCF, obeying CSMA/CA and deciding on RTS/CTS.
Рет қаралды 1,177
Күн бұрынOK, time to send data - we joined the cell, waiting for the AP and it's PCF to be done. Now, it's our turn. Let's dive into the Distributed Coordination Function (contention time!), go through the CSMA/CA access method, update our Network Allocation Vectors, decide on RTS/CTS or Duration and then handle hidden stations.
Part 1 The Alphabet Soup of Standards: • 802.11 Wireless part 1...
Part 2 Access Points and Joining a Cell: • 802.11 Wireless part 2...
Part 3 Header Control fields: • 802.11 Wireless part 3...
Part 4 Getting started with the access method - the PCF and DCF: • 802.11 Wireless part 4...
And this series is a return to a favorite topic. Here is the original playlist: • Wireless
I have also featured wireless topics in the HowTo and Hands On playlist: • HowTo and HandsOn
Books and other products for networkers
Packet Guide to Core Network Protocols: www.oreilly.co...
Packet Guide to Routing and Switching: www.oreilly.co...
Packet Guide to Voice over IP: www.oreilly.co...
Network Engineering Fundamentals: www.oreilly.co...
Advanced Network Engineering: www.oreilly.co...
Virtualization, Networking, and Storage: www.oreilly.co...
@janis_14 Жыл бұрын
great video. But isn't missing what happens when there are collisions, i.e. we don't get our ACK, CTS oder see after the DIPS that the channel is busy?
@BruceHartpence Жыл бұрын
Ahhh, good question. Well, part of that is the difference between CSMA/CD and CSMA/CA. With wireless we can't detect collisions so they just appear as interference or missed transmissions. CTS/RTS is not on all of the time and so the result is transmissions - and there is a retry flag as an indicator to help with this. Hope this helps.
SmashCrush! Arabic
Рет қаралды 42 МЛН