Get Unlimited Contributor Access to the all ExamTopics Exams!
Take advantage of PDF Files for 1000+ Exams along with community discussions and pass IT Certification Exams Easily.
Explanation: Probe Request are sent to the broadcast DA address (ff:ff:ff:ff:ff:ff). Once a Probe sent, STA starts a ProbeTimer countdown & wait for answers. At the end of the timer, STA process the answer it has received. If no answers received, STA moves to next channel & repeats the discovery process.
STA sending Probe Request may specify the SSID they looking (called directed probe request). Then only IBSS STA or AP support that SSID will answer. The SSID value can also be set to 0 (ie SSID field is present, but empty). This is called Wildcard SSID or Null Probe Request.
Null probe request: A probe request without the SSID information. A client station that is looking for any SSID sends a probe request with the SSID field set to null. If a null probe request is sent, all APs that hear the request should reply by sending a probe response.
You can have way more than one AP on a channel within Rx distance of the STA who will respond.
upvoted 1 times
...
...
Log in to ExamTopics
Sign in:
Community vote distribution
A (35%)
C (25%)
B (20%)
Other
Most Voted
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
Sorvahr
Highly Voted 1 year, 2 months agoEmaraldPython
Most Recent 6 months agoErki
12 months agoVicFix
1 year, 3 months agoRequest7108
4 months, 1 week ago