Understanding Throughput Improvement with 802.11ac APs

What is the most likely reason for no throughput improvement after upgrading from 802.11n to 802.11ac APs?

• A. The clients were not upgraded
• B. APs are mounted on the wall
• C. APs are still using the 5 GHz lower band
• D. APs are transmitting at a low transmit power

Answer: (A)

The most likely reason for no throughput improvement after upgrading from 802.11n to 802.11ac access points (APs) is that the clients were not upgraded. This is crucial because the benefits of 802.11ac, such as higher data rates, wider channels, and advanced modulation techniques (such as 256-QAM), can only be utilized by clients that are also equipped to support these features. If the clients are still using older standards, like 802.11n, they will not be able to take advantage of the capabilities of the newer APs. As a result, the performance will not improve significantly, causing throughput to remain comparable to what was experienced with the previous 802.11n AP setup. In the context of why the other options wouldn't explain the lack of throughput improvement: - The positioning of APs, such as being mounted on walls, can influence coverage and signal strength, but it does not inherently affect the throughput capability provided the signal can still reach the clients effectively. - Using the lower 5 GHz bands would not limit throughput; in fact, the 5 GHz band generally offers higher throughput and less congestion than the 2.4 GHz band, depending on the environmental conditions.

Upgrading your wireless network can feel like opening the door to a world of possibilities; faster speed, better connections, and improved reliability. But what if you find your new 802.11ac access points (APs) aren't delivering the expected throughput boost? You might think, "Did I just waste my money?" Well, you're not alone in this concern. Let's unravel the mystery of why your network is underperforming.

Wait, What About Those Clients?

The most significant reason behind the lack of throughput improvement typically comes down to one simple factor—your clients aren’t upgraded! Yep, if your devices are still clinging to outdated standards like 802.11n, you’re missing out on all the juicy benefits of 802.11ac. Think of it like buying a shiny new sports car but still using a regular old gas station, one that can't provide the high-octane fuel you need. Advanced features such as higher data rates, wider channels, and fancy modulation techniques like 256-QAM can’t work their magic if your clients can’t support them.

Imagine you’ve got this dazzling new AP, serving up faster speeds and more connections, but your laptop is still a relic from the past. It’s like trying to enjoy a blockbuster movie on a tiny screen—disappointing, right? Each client device needs to be up to the task to harness the amazing capabilities of your new APs. Otherwise, you’re left with performance that pales in comparison to what you’d hoped for.

Now, Don’t Get Fooled by Positioning

Some folks might argue that mounting the APs on walls or any odd angles could be leading to issues. Sure, placement can impact coverage, but it won’t necessarily throttle throughput if your signal is still reaching those clients effectively. Picture those APs sitting pretty along the walls, beaming signals—if the clients can still connect, they're good to go! Just remember, that might not be the root cause of your woes.

The Goodness of 5 GHz

What about those lower 5 GHz bands? Some might think they’re the culprits holding back performance. Not true! In fact, the 5 GHz band generally shines when it comes to throughput and usually has less congestion compared to the crowded 2.4 GHz band. So if you’re still using the lower bands, don’t blame them; you're still likely to see decent speeds if the environment is just right!

What Now?

So, how do you tackle the situation? Reflect on your network ecosystem. Start by making sure your clients can take advantage of the state-of-the-art features that come with 802.11ac. Consider upgrading those old devices. Yes, it can be a little investment, but think of the long-term benefits! And if you find that performance is still lagging, take a good look at your network layout and ensure your APs are positioned wisely—not just hanging on the wall for decoration.

Final Thoughts

Turning your wireless network into a powerhouse doesn’t happen overnight, and understanding these intricacies is your first step to success. As you study for the Certified Wireless Design Professional (CWDP) exam, remember that knowing the ins and outs of throughput improvement is key. It’s not just about the hardware; it’s about the harmony between your APs and clients, setting the stage for a seamless internet experience. Whether you're acing your exam or tackling real-world scenarios, this knowledge will definitely come in handy!