Spalding's briefing document said the US was lagging behind China in wireless, and the solution was to build its own federal 5G network. The memo cost Spalding his job and sent parts of Washington DC into fits of apoplexy over the proposals. But this idea, deemed too radical to even discuss in the US, has actually been implemented in countries like Mexico, Rwanda and Australia.
Well, if you're asking about "exactly," it doesn't exist yet. But the best answer to your question is probably that 5G is sort of a catch-all name to describe the next generation of carrier wireless technology that's going to be slinging tweets and videos and connected home signals from the internet to your smartphone or your smartwatch or, really, any smart object you've got handy. Haven't we had enough Gs? You see, 5G – like 4G, and the rest of the Gs, in fact – is entirely a marketing term, meant to give an overview of a certain generation of carrier wireless tech. Most of what we've got in this country that we refer to as 4G is called LTE, although regular LTE isn't quite 4G, according to standards groups, and LTE Advanced.
Wireless security is the prevention of unauthorized access or damage to computers or data using wireless networks. The most common types of wireless security are Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA). WEP is a notoriously weak security standard: the password it uses can often be cracked in a few minutes with a basic laptop computer and widely available software tools. WEP is an old IEEE 802.11 standard from 1997, which was superseded in 2003 by WPA, or Wi-Fi Protected Access. WPA was a quick alternative to improve security over WEP.
O2 has unveiled a trial in which light will become the backbone of wireless connectivity and networks in preparation for the emergence of 5G. On Wednesday, the telecommunications provider revealed the project at the O2 headquarters in Slough, UK. The company's trial, made possible through a partnership with pureLiFI, will be "used to provide high-speed wireless connectivity" via LED light bulbs. The LED light bulbs are connected to pureLiFi's LiFi-XC system and are "LiFi-enabled," which is described as a category of Optical Wireless Communications (OWC) including infrared, ultraviolet, and visible light. The energy created by light for illumination can "also be used for communication," according to pureLiFI, by connecting multiple light bulbs to form a wireless network.
Wireless technology has evolved rapidly since the turn of the century. From voice-only 2G capabilities and internet-enabled 3G, today's ecosystem of wireless activity is founded on the reliable connection of 4G. Fifth-generation wireless network technology, better known as 5G, is now being rolled out in major cities worldwide. By 2024, an estimated 1.5 billion mobile users which account for 40% of current global activity will be using 5G wireless networks. Today's chart highlights three generations of wireless technology in the 21st century, and the differences between 3G, 4G, and 5G networks.