Chapter 6 Wireless and Mobile Networks - Network and Systems Lab
Chapter 6 Wireless and Mobile Networks - Network and Systems Lab
Chapter 6 Wireless and Mobile Networks - Network and Systems Lab
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802.11: passive/active scanning<br />
BBS 1<br />
BBS 2<br />
BBS 1<br />
BBS 2<br />
AP 1<br />
1<br />
1<br />
AP 2<br />
AP 1<br />
2<br />
1<br />
2<br />
AP 2<br />
2 3<br />
3 4<br />
H1<br />
Passive Scanning:<br />
(1) beacon frames sent from APs<br />
(2) association Request frame sent:<br />
H1 to selected AP<br />
(3) association Response frame sent:<br />
H1 to selected AP<br />
H1<br />
Active Scanning:<br />
(1) Probe Request frame broadcast<br />
from H1<br />
(2) Probes response frame sent from<br />
APs<br />
(3) Association Request frame sent:<br />
H1 to selected AP<br />
(4) Association Response frame sent:<br />
H1 to selected AP<br />
6: <strong>Wireless</strong> <strong>and</strong> <strong>Mobile</strong> <strong><strong>Network</strong>s</strong> 6-21
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