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5G Network Interview Questions
Most likely, the two technologies will coexist for a period of time as network rollouts progress. Right now, 5G can be used as an alternative to Wi-Fi depending on location and coverage.
 
It’s also beneficial in public areas, where 5G can be safer than Wi-Fi.
Broadly speaking, 5G is used across three main types of connected services, including enhanced mobile broadband, mission-critical communications, and the massive IoT. A defining capability of 5G is that it is designed for forward compatibility—the ability to flexibly support future services that are unknown today.

Enhanced mobile broadband : In addition to making our smartphones better, 5G mobile technology can usher in new immersive experiences such as VR and AR with faster, more uniform data rates, lower latency, and lower cost-per-bit.

Mission-critical communications : 5G can enable new services that can transform industries with ultra-reliable, available, low-latency links like remote control of critical infrastructure, vehicles, and medical procedures.

Massive IoT : 5G is meant to seamlessly connect a massive number of embedded sensors in virtually everything through the ability to scale down in data rates, power, and mobility—providing extremely lean and low-cost connectivity solutions.
The average consumer is expected use close to 11 GB of data per month on their smartphone in 2022 This is driven by explosive growth in video traffic as mobile is increasingly becoming the source of media and entertainment, as well as the massive growth in always-connected cloud computing and experiences.
 
4G completely changed how we consume information. In the past decade we have witnessed leaps and bounds in the mobile app industry around services such as video streaming, ride sharing, food delivery and more.
 
5G will expand the mobile ecosystem to new industries. This will contribute to cutting-edge user experiences such as boundless extreme reality (XR), seamless IoT capabilities, new enterprise applications, local interactive content and instant cloud access, to name a few.
With high data speeds and superior network reliability, 5G will have a tremendous impact on businesses. The benefits of 5G will enhance the efficiency of businesses while also giving users faster access to more information.
 
Depending on the industry, some businesses can make full use of 5G capabilities, especially those needing the high speed, low latency, and network capacity that 5G is designed to provide. For example, smart factories could use 5G to run industrial Ethernet to help them increase operational productivity and precision.
5G is designed to deliver peak data rates up to 20 Gbps based on IMT-2020 requirements. Qualcomm Technologies’ flagship 5G solutions, the Qualcomm® Snapdragon™ X65 is designed to achieve up to 10 Gbps in downlink peak data rates.

But 5G is about more than just how fast it is. In addition to higher peak data rates, 5G is designed to provide much more network capacity by expanding into new spectrum, such as mmWave.

5G can also deliver much lower latency for a more immediate response and can provide an overall more uniform user experience so that the data rates stay consistently high—even when users are moving around. And the new 5G NR mobile network is backed up by a Gigabit LTE coverage foundation, which can provide ubiquitous Gigabit-class connectivity.
5G can change home internet service by providing a wireless modem alternative to existing wires. Internet Service Providers (ISPs) can now serve customers using 5G infrastructure – making the coverage, performance and deployment flexibility of 5G a compelling backhaul alternative to fiber, DSL or cabled solutions.
Even though the downsides of 5G are clear when considering how easily mmWave can be blocked, or less clear considering Radio Frequency (RF) exposure limits, 5G still has plenty of worthy benefits, such as the following :
 
* use of higher frequencies;
* high bandwidth;
* enhanced mobile broadband;
* a lower latency of 5 ms;

higher data rates, which will enable new technology options over 5G networks, such as 4K streaming or near-real-time streaming of virtual reality (VR); and
the potential to have a 5G mobile network made up of low-band, midband and mmWave frequencies.
Latency in the case of 5G refers to over-the-air latency, between the user device and the radio access network radio. To reduce overall latency, service providers will need to put data much closer to end-users, which is why some MNOs are considering leasing space at their cell sites to host data and applications for content providers, particularly in large urban centers. Ultimately, the placement of data and processing will be determined by the supported 5G application. The Mobile Edge Computing (MEC) initiative will play a major role in addressing this important challenge.
Network operators are developing two types of 5G services :

* 5G fixed wireless broadband services
* 5G cellular services
 
5G fixed wireless broadband services deliver internet access to homes and businesses without a wired connection to the premises. To do that, network operators deploy NRs in small cell sites near buildings to beam a signal to a receiver on a rooftop or a windowsill that is amplified within the premises. Fixed broadband services are expected to make it less expensive for operators to deliver broadband services to homes and businesses because this approach eliminates the need to roll out fiber optic lines to every residence. Instead, operators need only install fiber optics to cell sites, and customers receive broadband services through wireless modems located in their residences or businesses.

5G cellular services  provide user access to operators' 5G cellular networks. These services began to be rolled out in 2019 when the first 5G-enabled (or -compliant) devices became commercially available. Cellular service delivery is also dependent upon the completion of mobile core standards by 3GPP.
Each generation of cellular technology differs in its data transmission speed and encoding methods, which require end users to upgrade their hardware. 4G can support up to 2 Gbps and is slowly continuing to improve in speeds. 4G featured speeds up to 500 times faster than 3G. 5G can be up to 100 times faster than 4G.
 
One of the main differences between 4G and 5G is the level of latency, of which 5G will have much less. 5G will use Orthogonal Frequency-Division Multiplexing (OFDM) encoding, similar to 4G LTE. 4G, however, will use 20 MHz channels, bonded together at 160 MHz. 5G will be up to between 100 and 800 MHz channels, which requires larger blocks of airwaves than 4G.
 
Samsung is currently researching 6G. Not too much is currently known on how fast 6G would be and how it would operate; however, 6G will probably operate in similar differences in magnitude as between 4G and 5G. Some think 6G may use mmWave on the radio spectrum and may be a decade away.

Sources : qualcomm, cisco, verizon, techtarget, more..