Sunday, August 25, 2013

STA-AP: Connection Establishment(No Security)

Sequence diagrams are very useful in understanding the interaction between various nodes in an 802.11 network. I will post sequence diagrams of 802.11 scenarios in this blog.
  • The sequence diagrams will be created from "actual" air traces in the network (Notice the frame numbers in the diagram)
  • The air trace used to create the sequence diagram will also be attached
I will start with a very basic scenario: "Connection establishment"
  • Mode: Infrastructure
  • No security (Open Network)

Connection establishment involves the following basic steps:

  • Scan
    • In case of an active scan, the STA would send out a probe request and receive a probe response from the AP.
    • In case of a passive scan, the STA would find the AP by listening to the beacon.
  • Authentication
  • Association

The air-trace for this scenario can be downloaded here.

1 comment:

  1. Thanks for sharing, nice post! Post really provice useful information!

    FadoExpress là một trong những công ty vận chuyển hàng hóa quốc tế hàng đầu chuyên vận chuyển, chuyển phát nhanh siêu tốc đi khắp thế giới, nổi bật là dịch vụ gửi hàng đi úc và dịch vụ gửi hàng đi canada uy tín, giá rẻ