Hybrid Coordination Function (HCF)
As we discussed in this post, DFC comes with some drawbacks that make it an inefficient Coordination Function for real-time
Continue readingMonth: April 2020
DCF: triggering the Back-Off timer
I’m writing this post as I can see some confusion around the Back-Off timer in DCF, and not much information
Continue readingDistributed Coordination Function (DCF)
802.11 Coordination Functions are the Medium Access Control (MAC) mechanisms for which a number of wireless devices are orchestrated within
Continue reading802.11a/g/n/ac maximum speeds
This is a little post to help calculating the maximum speeds of every OFDM standard:
Continue reading“Hidden node” vs. “Exposed node”
Two different situations, one common solution.
Continue readingWhere does the 54 Mbps figure come from anyway?
Have you ever wondered why both 802.11a and 802.11g have maximum speeds of 54 Mbps?
Continue readingWhy CSMA/CA and not CSMA/CD in 802.11?
Carrier Sense Media Access (CSMA) is a network access mechanism that has been around since the early days of networking.
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