802.11n combined with the 2.4GHz frequency offers the greatest compatibility for IoT devices.
802.11n: Operates on both 2.4GHz and 5GHz bands, offering backward compatibility with older standards like 802.11b/g.
2.4GHz: Has longer range and better penetration through walls, making it ideal for IoT devices that are spread across large areas.
Why Not A (A and 5GHz): 802.11a is outdated and supports only 5GHz, offering limited compatibility.
Why Not B (Band 2.4GHz): A frequency alone isn't a standard; 802.11n paired with 2.4GHz provides a more complete solution.
Why Not C (G and 5GHz): 802.11g supports only 2.4GHz, not 5GHz, and is slower compared to 802.11n.
CompTIA A+ Exam Reference: Core 1 (220-1101), Section 2.3, wireless networking standards and frequencies.

A network tap (Test Access Point) is a device used for monitoring network traffic. It allows the technician to passively observe the traffic between two network nodes in real-time without introducing latency or affecting the network's performance. By using a network tap, the technician can analyze the data packets flowing through the network to identify if packet loss is occurring, which could be contributing to the slow network traffic in the branch office.

According to Dell Community, the Wi-Fi antenna is located in the top of the LCD display housing. It consists of two elements, fed by two cables, a white main designated on the Wi-Fi card by a white triangle, and a black auxiliary designated on the Wi-Fi card by a black triangle1.

A loopback plug is a device that can be used to test the functionality of a network interface card (NIC) by sending and receiving data packets from itself. The loopback plug connects to the NIC's port and simulates a network connection without requiring another device or cable. The technician can use a loopback plug to verify that the NIC is able to transmit and receive data without errors or interruptions.
Reference: https://www.comptia.org/training/books/a-core-1-220-1101-study-guide (page 76)

When a laptop screen is not displaying on a conference room TV despite being connected to a wireless HDMI dongle, the issue is often related to the TV being set to the wrong input source. Since the in-room computer's desktop is displayed, it suggests the TV is currently set to the input source used by the in-room computer. Changing the TV's input source to the one associated with the wireless HDMI dongle connected to the user's laptop is the simplest and most direct approach to resolve the issue. This does not involve adjusting network settings or hardware configurations but rather selecting the correct input source through the TV's input selection menu.