Wi-Fi, Gi-Fi, thiab Li-Fi piav qhia - Lub neej yav tom ntej ntawm kev sib txuas wireless
Peb feem ntau siv Wi-Fi kom pom zoo. Thaum peb xav txog kev ceev hauv internet, peb feem ntau saib cov thev naus laus zis los ntawm tus muab kev pabcuam. Xav txog ntau npaum li cas ntawm kev txhim kho peb tau ua thaum koj saib ntawm dial-up internet thiab muab piv rau qhov nrawm…