Certified Wireless Design Professional (CWDP) Practice Exam 2025 – All-in-One Guide to Excel in Your Certification!

To achieve a 450 Mbps Modulation and Coding Scheme (MCS) with the 802.11n standard, using Short Guard Interval (GI), 40 MHz channel width, and 3 spatial streams is necessary.

Short GI allows for a faster transmission speed because it reduces the time interval between transmitted data frames, thus enabling more data to be sent in the same amount of time. Utilizing a 40 MHz channel width effectively doubles the bandwidth available compared to standard 20 MHz channels, allowing for greater data throughputs. In conjunction with multiple spatial streams—specifically 3 in this case—data can be transmitted and received across multiple antennas, enhancing overall data rates significantly.

Combining these factors directly leads to achieving the required throughput of 450 Mbps, leveraging the advanced capabilities of 802.11n technology to maximize performance in wireless communications.