Exam 200-301 topic 1 question 25 discussion

If I have understood correctly, C and E have somehow the same meaning: avoid signal overlapping, since E separate the channel to avoid using the same channel and having signal collision. See "Dynamic Channel Assignment" in https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-5/config-guide/b_cg85/radio_resource_management.html A and B are kind of tricky to mention 5GHz, which must have non-overlapping channels, and actually accomplish what C/E have done, but they're saying incorrect stuff. For A: 2.4GHz has 11 Channels, 5GHZ has 45 Channels For B: There are two types of APs: autonomous AP/controllerless AP/"Fat AP" and lightweight AP/AP with Controller. Ref:https://stormwindstudios.com/wireless-access-points/ And lightweight AP can be applied to 2.4GHz and 5Hz (there's command for both in cisco lightweight AP, just google it.... For D: I think the repeater cannot solve the problem of "overlapping channels" since it just re-transmit or "repeat" the signal, aka the overlapping channels will still be overlapping!

A-C the correct answers based on the ccna 200-301 official cert guide volume 1 page 627, they mentioned 5GHz channels briefly but clearly with figure 26-22 lists all 23 non-overlapping channels (36,40,44,48,52,56,60,64,100,104,108,112,116,120,124,128,132,136,140,149,153,157,161). That's according to the official guide of the CCNA and I don't care about any other resources.

5GHz band provides a larger number of non-overlapping channels

A. 5GHz provides increased network capacity with up to 23 nonoverlapping channels. Explanation: In the 5GHz band, there are more non-overlapping channels compared to the 2.4GHz band. Depending on regulatory domain and channel width (20MHz or 40MHz), the 5GHz band can provide up to 23 non-overlapping channels, significantly reducing interference. C. Cells that overlap one another are configured to use nonoverlapping channels. Explanation: To minimize interference, overlapping Wi-Fi cells should be configured with non-overlapping channels. This is especially important for adjacent access points to ensure optimal network performance.

I think C and E. Initially I was A and C, but A is factually wrong (23 channels, when there are 24 but maybe that is a typo) but A is more pointing out the existence and not providing a solution as the question is asking for. The standard designs we should suggest companies implement are WLC and Cells that overlap one another are configured not to use same same channels.

The question did not specify whether the existing network design operates on a 2.4GHz or a 5GHz frequency band standard. We are to define based on a suitable choice. The tone of this question is focused on proposing a workable standard based on your comprehension of the workings of either of both standards and then selecting the option that best fits the problem. A and C are the right answers because: 1. The 5GHz frequency band possesses 23 non-overlapping frequency channels: (36,40,44,48,52,56,60,64,100,104,108,112,116,120,124,128,132,136,140,149,153,157,161). [ccna 200-301 official cert guide volume 1 page 627] <--- iGlitch 2. Neighbouring or overlapping cells must operate on different channels to avoid interference CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance, found more in Wireless communication IEEE 802.11 standard; applied to enforce collision avoidance).

My answer is CE The question clearly asks about extending an existing network. It's not building a new network. If the existing network has only 2.4G, you can't "add" 5G signal. Therefore A is not realistic, plus 5G has not only 23 channels. C is not limiting to any frequency band. It's correct. E leaves the job with the controller, achieving the same effect as C.

5GHz has 24 nonoverlapping channels NOT 23 This is why C and E

C & E. A is not a design, it is a fact.

While A may be stating a fact, it is simply that - a statement, NOT an action. Meanwhile, C and E is actually about "configuring" and making changes to IMPROVE the network.

In Wi-Fi networking, the 5GHz band typically provides up to 24 nonoverlapping channels. However, the statement provided in option A mentioning 23 nonoverlapping channels is likely a typo or a slight variation from the standard understanding, but it still generally aligns with the concept of having numerous noninterfering channels in the 5GHz spectrum. So, the correct answers considering the options provided are: A. 5GHz provides increased network capacity with up to 23 nonoverlapping channels. C. Cells that overlap one another are configured to use nonoverlapping channels. Option A's mention of 23 channels is considered acceptable as it aligns with the intent of providing information about the 5GHz band's capability to support multiple nonoverlapping channels, despite the standard typically stating up to 24 channels.

Question A isn't a typo. so C and E is correct

AC should be correct

A. 5GHz provides increased network capacity with up to 23 nonoverlapping channels. The 5GHz band indeed offers more nonoverlapping channels compared to the 2.4GHz band, which helps in reducing interference and increasing network capacity. This allows for better performance in dense environments where many access points (APs) are deployed. C. Cells that overlap one another are configured to use nonoverlapping channels. When coverage cells overlap, it is crucial to configure them with nonoverlapping channels to minimize interference. This design principle helps in maintaining a stable and efficient Wi-Fi network by preventing co-channel interference, which can degrade performance. The other options are not recommended for standard Wi-Fi network designs:

C & E are correct https://www.cisco.com/c/en/us/support/docs/wireless/wireless-lan-controller-software/118833-wlc-design-ftrs-faq.html?dtid=osscdc000283

AC are correct

"For the 5 GHz radio, up to 23 non-overlapping channels are offered. Assigning a specific value statically assigns a channel to that AP."