Exam N10-008 topic 1 question 173 discussion

802.11a - 5GHZ 802.11b - 2.4GHZ 802.11g - 2.4GHZ 802.11n - 2.4/5GHZ MIMO 802.11ac - 5GHZ MU-MIMO 802.11ax - 2.4/5/6GHZ MU-MIMO

mu-mimo wifi6 {ax}

The BEST wireless standard for this project would be 802.11ax, which is designed to work in high-density areas and is compatible with both 2.4GHz and 5GHz frequencies. 802.11ax also supports MU-MIMO, which can improve connection performance in high-density areas.

Don’t know why g is even chosen, but ax will support the highest density network.

802.11ax, also known as Wi-Fi 6, is the latest wireless standard and is designed to support high-density environments with multiple devices. It supports both 2.4GHz and 5GHz frequencies and incorporates multi-user multiple input multiple output (MU-MIMO) technology, which can improve connection performance in high-density areas. In addition to MU-MIMO, 802.11ax also includes other features that can help improve performance in high-density environments, such as Orthogonal Frequency Division Multiple Access (OFDMA), which allows multiple devices to share the same channel simultaneously.

A. 802.11ac is the best wireless standard for this project. 802.11ac is a wireless standard that operates in the 5GHz frequency band and supports MU-MIMO, which can help to improve connection performance in high-density areas. This standard also provides backwards compatibility with clients connecting using 2.4GHz frequencies, making it a good choice for the soccer stadium project.

A. 802.11ac Supports both 2.4GHz and 5GHz and designed for high-density areas 802.11ax is newest, but the stadium might not have the proper infrastructure, and (more importantly) older devices do not support it. 802.11g is a very old standard, only supports 2.4GHz, and has limited performance. 802.11n is also an old standard, but supports both 2.4GHz and 5GHz. Still has limited performance compared to 802.11ac and not a great option for high-density areas.

The 802.11ax standard is the best option for the given scenario because it provides multi-user MIMO (MU-MIMO) technology, which improves connection performance in high-density areas. It also supports both 2.4GHz and 5GHz frequencies, making it compatible with a wide range of client devices. On the other hand, 802.11ac and 802.11n are limited to 5GHz frequency and do not support MU-MIMO technology, which is required for high-density areas. 802.11g is an older standard that operates only on the 2.4GHz frequency and has lower data rates compared to the other options.

B: 802.11ax Following are the major changes made in the 802.11ax technology. ➨Guard interval and Symbol duration have been increased by factor of 4 (subcarrier offset is reduced by factor of 4). Hence wifi signal becomes more robust for outdoor applications. ➨1024QAM has been added, hence it helps in achieving higher maximum data rates. ➨Spatial multiplexing is extended to support 8x8 MIMO ➨OFDMA has been introduced in both downlink and uplink to share OFDM subcarriers among multiple users unlike OFDM used in previous standards where in all the subcarriers are allocated for single user. Due to OFDMA, single channel can be shared by multiple users in parallel. ➨MU (Multi-user) MIMO has been added in the uplink also where as in previous standards it was available only in the downlink part. Hence higher throughput is achieved in the uplink through SDM (Spatial Division Multiplexing). ➨Extended range preamble is used in the frame structure.