BRKEWN-2019 – 7 Ways to Fail as a Wireless Expert
Presenter: Steven Heinsius, Product Manager, Enterprise Networking Group
I’m hoping the title of this session could also be “7 Ways to not be a TOTAL Wireless Noob” since that’s more my level. 
The Basics
- WiFI has been a standard since 1997
Taking a 100 employee company….
- 1999: 1-2 clients on the network
- 2005: 5 or 10
- 2007: 25+ (802.11n came around)
- 2010: 150 (smartphones in the office; laptops becoming the norm in the office)
- 2013: > 200
- 2016: > 300 (3 devices per person)
In 2007-2009, networks were designed for coverage. Those networks are still around and are being asked to support (on average) 3 devices per person.
WiFi is
- Half duplex
- A shared medium (like a hub!)
- AP talks to one client at a time; airtime is time sliced amongst all clients
- AP asks a client to ack every packet (?) it sends to a client
- Acks are retransmitted if not answered which means all other clients have to remain silent (and lowers performance)
Distance vs modulation
- When a client is farther away from the AP, the modulation is stepped down to increase the likelihood that the signal will make it
- The trade off is that Continue reading
Just when it was bragging about its Azure integration.
Acquisitions are nice, but Cisco wants some home cooking, too.
Combining security with network routers.