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<h2 dir="ltr" id="tag-2"><strong>What Is WiFi 4? </strong></h2>

<p dir="ltr">Released in 2009, WiFi 4 is a new abbreviation for 802.11 n WiFi standard, the next generation of 802.11 g WiFi standard. It is an innovative form with superior features and capabilities. The WiFi 4’s routers are commonly used for homes, individuals, or workplaces. </p>

<p dir="ltr" style="text-align:center"><img alt="What is WiFi 4?" src="http://gospeedcheck.com/filemanager/data-images/imgs/20240618/what%20is%20wifi%204/what-is-wifi4%20(6).jpg" style="height:400px; width:640px"></p>

<p dir="ltr" style="text-align:center"><em>What is WiFi 4?</em></p>

<blockquote>
<p dir="ltr"><em>Also read:</em></p>

<ul>
<li><a href="https://gospeedcheck.com/article/what-is-fiber-wifi-1517">What is fiber wifi?</a></li>
	<li><a href="https://gospeedcheck.com/article/what-is-a-wifi-dongle-1519">What is a wifi dongle?</a></li>
</ul>
</blockquote>

<h2 dir="ltr" id="tag-17"><strong>What Are WiFi 4's Features?</strong></h2>

<h3 dir="ltr" id="tag-19"><em><strong>Dual-band </strong></em></h3>

<p dir="ltr">Dual-band, one of the WiFi 4’s main features, is more popular with home users.  WiFi 4 provides both 2.4 GHz and 5 GHz bands with their distinct coverage or range for users. </p>

<p dir="ltr">What is the range of 5GHz WiFi? The 5 GHz band has a small range that makes it impossible to cover a large area and penetrate through solid objects. However, this band’s data transmitting speed is faster than 2.4 GHz. </p>

<p dir="ltr">The range of the 2.4 GHz band is the largest among the others, but its data speed is lower. </p>

<p dir="ltr">WiFi 4 presents a perfect combination of both options to help customers access the faster and larger bands.   </p>

<p dir="ltr" style="text-align:center"><img alt="WiFi 4 features dual-band" src="http://gospeedcheck.com/filemanager/data-images/imgs/20240618/what%20is%20wifi%204/what-is-wifi4%20(3).jpg" style="height:400px; width:640px"></p>

<p dir="ltr" style="text-align:center"><em>WiFi 4 features dual-band</em></p>

<h3 dir="ltr" id="tag-30"><em><strong>MIMO</strong></em></h3>

<p dir="ltr">MIMO, a versatile wireless technology, allows WiFi 4 to transmit and receive more than a signal at the same time. Thanks to the installation of multiple antennas to the routers, WiFi 4’s MIMO can transfer more than data. </p>

<p dir="ltr" style="text-align:center"><img alt="WiFi 4 uses MIMO wireless technology " src="http://gospeedcheck.com/filemanager/data-images/imgs/20240618/what%20is%20wifi%204/what-is-wifi4%20(2).jpg" style="height:400px; width:640px"></p>

<p dir="ltr" style="text-align:center"><em>WiFi 4 uses MIMO wireless technology </em></p>

<h3 dir="ltr" id="tag-38"><em><strong>Speed</strong></em></h3>

<p dir="ltr">You run a <a href="https://gospeedcheck.com/article/wifi-speed-test-1060">WiFi speed test</a> to compare WiFi 4 with its predecessor. WiFi 4 can reach up to 72 Mbps larger than WiFi 3’s speed of 54 Mbps. It can achieve 144 Mbps with 2x2 MIMO. The use of extra antennas can support WiFi 4 to achieve a speed of 150 Mbps. </p>

<p dir="ltr" style="text-align:center"><img alt="Make a WiFi speed test to check the Internet speed" src="http://gospeedcheck.com/filemanager/data-images/imgs/20240618/what%20is%20wifi%204/what-is-wifi4%20(7).jpg" style="height:400px; width:640px"></p>

<p dir="ltr" style="text-align:center"><em>Make a WiFi speed test to check the Internet speed</em></p>

<h3 dir="ltr" id="tag-47"><em><strong>Bandwidth</strong></em></h3>

<p dir="ltr">Routers using WiFi 4 can connect 20 MHz channels to the wider 40 MHz channels. What is the best WiFi 4’s bandwidth? The 40 MHz bandwidth allows this WiFi standard to use larger space for sending more data in a shorter time.  </p>

<h2 dir="ltr" id="tag-51"><strong>WiFi 4's Applications</strong></h2>

<h3 dir="ltr" id="tag-53"><strong>Wide Internet Coverage </strong></h3>

<p dir="ltr">It plays a crucial role as a perfect wireless connection everywhere such as homes, buildings, schools, companies, hospitals, and shopping centers.</p>

<p dir="ltr">The application of WiFi 4 is compatible with various smart devices. Thus, you can use any device like a smartphone or laptop to access the WiFi 4 network for your specific purposes. </p>

<p dir="ltr">However, you can face a problem connecting when accessing WiFi 4 on your smart devices. What to do when your WiFi is not working? Check the connection to the WiFi network to identify the type of problem and restart your devices. </p>

<p dir="ltr" style="text-align:center"><img alt="WiFi coverage allows users to access everywhere" src="http://gospeedcheck.com/filemanager/data-images/imgs/20240618/what%20is%20wifi%204/what-is-wifi4%20(1).jpg" style="height:400px; width:640px"></p>

<p dir="ltr" style="text-align:center"><em>WiFi coverage allows users to access everywhere</em></p>

<h3 dir="ltr" id="tag-62"><strong>WiFi Public Access Points </strong></h3>

<p dir="ltr">WiFi 4’s public access points are convenient for anyone when they want to access the Internet. Providers allow users to use their public wireless network service at an economical cost. This application helps smart device owners avoid high data charges.   </p>

<p dir="ltr" style="text-align:center"><img alt="WiFi public access points" src="http://gospeedcheck.com/filemanager/data-images/imgs/20240618/what%20is%20wifi%204/what-is-wifi4%20(5).jpg" style="height:400px; width:640px"></p>

<p dir="ltr" style="text-align:center"><em>WiFi public access points</em></p>

<h3 dir="ltr" id="tag-69"><strong>Healthcare And Medical </strong></h3>

<p dir="ltr">WiFi 4 can supply the Internet connection between medical equipment and smart devices to take care of a patient's health. With the support of wireless networks, doctors and medical staff from different places can easily check the patients’ status and give them useful advice.  </p>

<p dir="ltr" style="text-align:center"><img alt="The WiFi application for healthcare and medical " src="http://gospeedcheck.com/filemanager/data-images/imgs/20240618/what%20is%20wifi%204/what-is-wifi4%20(4).jpg" style="height:400px; width:640px"></p>

<p dir="ltr" style="text-align:center"><em>The WiFi application for healthcare and medical </em></p>

<h2 dir="ltr" id="tag-76"><strong>WiFi 4 vs WiFi 5 vs WiFi 6</strong></h2>

<p dir="ltr">2014 saw the release of WiFi 5, or 802.11ac, which represented a major speed increase. With speeds as high as 3.5 Gbps in theory, it operates only in the less crowded 5 GHz range.</p>

<p dir="ltr">On the other hand, WiFi 6 or 802.11ax was released in 2019. It delivers several enhancements, such as faster speeds, greater ranges, higher efficiency, and more power efficiency, building on the foundation set by its predecessors.</p>

<table class="table table-bordered"><tbody>
<tr>
<td>
			<p dir="ltr"><strong>WiFi 4</strong></p>
			</td>
			<td>
			<p dir="ltr"><strong>WiFi 5</strong></p>
			</td>
			<td>
			<p dir="ltr"><strong>WiFi 6</strong></p>
			</td>
		</tr>
<tr>
<td>
			<p dir="ltr">Ideal for basic Internet usage, web browsing, and low-resolution video streaming. It's also a budget-friendly option.</p>
			</td>
			<td>
			<p dir="ltr">Perfect for high-definition video streaming, online gaming, and supporting multiple connected devices simultaneously.</p>
			</td>
			<td>
			<p dir="ltr">An ultimate choice for power users, future-proofing your network for demanding applications like 4K/8K streaming, VR/AR gaming, etc.</p>
			</td>
		</tr>
</tbody></table>
<p dir="ltr">You may also discover more about WiFi 7 in our guide to <a href="https://gospeedcheck.com/article/what-is-wifi-7-what-are-the-superior-features-and-benefits-of-wifi-7-1050">What is WiFi 7</a>?”</p>
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