1. 无线保真(Wi-Fi)：
Wi-Fi 是一种无线网络技术，它允许计算机、移动设备和其他电子设备等设备与互联网连接。使用无线电波提供无线高速互联网和网络连接。通过无线路由器互联网连接的帮助发生。它是一种基于 IEEE 802.11 标准的无线网络协议。主要是指无线局域网技术。
2. 千兆保真(Gi-Fi)：
Gi-Fi或千兆无线是指无线传输系统。 Gi-Fi 提供每秒超过 10 亿位的数据速率。它是 Wi-Fi 的更快版本。一般来说，如果我们会看到它比 WiFi 技术快十倍。 Gi-Fi 技术是世界上集成在单个芯片上的收发器，使用 CMOS 工艺在 60GHz 下运行。 IEEE 802.15.3C 标准中定义的 Gi-Fi。
Wi-Fi 和 Gi-Fi 的区别：
| S.No. | Wi-Fi | Gi-Fi |
|---|---|---|
| 01. | Wi-Fi uses radio frequency waves for data transmission over air. | Gi-Fi uses millimeter waves for data transmission over air. |
| 02. | Frequency range of Wi-Fi is 2.4 GHz and/or 5 GHz. | Frequency range of Gi-Fi is 57 to 64 GHz. |
| 03. | Wi-Fi provides a data rate/speed of 150 Mbps and more. | Gi-Fi provides a data rate/speed of 5 Gbps and more. |
| 04. | Its coverage range is larger. | Its coverage range is smaller. |
| 05. | Wi-Fi can cover a distance about 300 meters. | Gi-Fi can cover a distance about 10 meters. |
| 06. | Its data density is very low. | Its data density is very high. |
| 07. | Development started in the year 1990. | Development started in the year 2004. |
| 08. | Its cost is high. | Its cost is low. |
| 09. | Specification authority of Wi-Fi is IEEE and WECA. | Specification authority of Wi-Fi is NICTA. |
| 10. | Its power consumption is little bit high i.e 10 mW (milli Watts). | Its power consumption is little bit low i.e less than 2 mW (milli Watts). |
| 11. | Primary application of Wi-Fi is WLAN. | Primary application of Gi-Fi is both WPAN and WLAN. |