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5G is the fifth generation wireless technology for digital cellular networks that began wide deployment in 2019. As with previous standards, the covered areas are divided into regions called “cells”, serviced by individual antennas.
5G wireless networks can be used to achieve the high communication requirements of the IoT and connect a large number of IoT devices, even when they are on the move.
5G can support up to a million devices per square kilometer, while 4G supports only up to 100,000 devices per square kilometer.
The new 5G wireless devices also have 4G LTE capability, as the new networks use 4G for initially establishing the connection with the cell, as well as in locations where 5G access is not available.
https://en.m.wikipedia.org/wiki/5G
5G NR (New Radio) is a new radio access technology (RAT) developed by 3GPP for the 5G (fifth generation) mobile network. It was designed to be the global standard for the air interface of 5G networks.
5G NR (New Radio) is a new air interface developed for the 5G network. It is supposed to be the global standard for the air interface of 3GPP 5G networks.
https://en.m.wikipedia.org/wiki/5G_NR
5K resolution refers to display formats with a horizontal resolution of around 5,000 pixels. The most common 5K resolution is 5120 × 2880, which has an aspect ratio of 16:9 with around 14.7 million pixels (just over seven times as many pixels as 1080p Full HD), with four times the linear resolution of 720p. This resolution is typically used in computer monitors to achieve a higher dpi, and is not a standard format in digital television and digital cinematography, which feature 4K resolutions and 8K resolutions.