Exam 640-722 Topic 1 Question 169 Discussion
Actual exam question for Cisco's 640-722 exam
Question #: 169
Topic #: 1
Question #: 169
Topic #: 1
Which two statements about beacon frames used by access points are true? (Choose two.)
Suggested Answer: A,B Vote an answer
Probably the most common 802.11 management frame is the beacon frame. This frame is broadcasted from the AP listing the capabilities of the WLAN, but what exactly is listed? Let's take a quick look.
Beacon frame from a Cisco WLAN Here we can easily make out some of the capabilities of the WLAN, for example the SSID is probably going to be the first thing you notice TestSSID in this case, this is what provides the name of the WLAN. As you know SSID broadcasting can be disabled (Also called Closed System) at which point the SSID field will be blank. Now, at the end of the beacon frame you will notice all this Unknown information, as you have probably guessed (or read) this information is vendor specific, which is common for every vendor to have put their own proprietary information within the Beacon frames.
Reference: http://ccie-or-null.net/2011/06/22/802-11-beacon-frames/
Beacon frame from a Cisco WLAN Here we can easily make out some of the capabilities of the WLAN, for example the SSID is probably going to be the first thing you notice TestSSID in this case, this is what provides the name of the WLAN. As you know SSID broadcasting can be disabled (Also called Closed System) at which point the SSID field will be blank. Now, at the end of the beacon frame you will notice all this Unknown information, as you have probably guessed (or read) this information is vendor specific, which is common for every vendor to have put their own proprietary information within the Beacon frames.
Reference: http://ccie-or-null.net/2011/06/22/802-11-beacon-frames/
by Earl at Dec 15, 2023, 07:34 AM
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