For Wi-Fi network, there are two types of most used radio frequencies out there, for example, 2.5 GHz and 5 GHZ. Single Band, Dual Band, or Tri-Band are the commbinations of these radio frequencies. For example, Single Band uses 2.5 GHz or 5 GHz and Dual Band uses both 2.5 GHz and 5 GHz. For Tri-Band, it adds an extra 5 GHz to Dual Band. Using Dual-Band or Tri-Band gives an edge over Signle Band because these combined frequencies get less congested and add all of the benefits of 2.5 GHz and 5 GHz