 applications. SDN and Network Function Virtualization (NFV) technologies are used to create and manage the different end-to-end network slices. An operator will define the characteristics and capabilities of each slice, such as the bandwidth, latency, and reliability requirements, and use SDN and NFV to allocate resources and configure the network accordingly. When end users connect to a network, they are automatically connected to the appropriate network slice. This selection depends on the requirements of their device and applications in use. The network is then able to route the user's traffic through the appropriate network slice. In this process, the desired performance and Quality of Service (QoS) are met. Let us look at a simple analogy to network slicing. Let us say there are two large cities - City A and City B. The operator is responsible for creating roads between the two cities. The traffic between these two cities consists mainly of cars, motorbikes, and trucks. Historically, all three have shared the same road and have not been happy with their experience on the road, due to accidents and delays. The operator now has two choices: Build three different highways and assign one for trucks, one for cars, and one for motorbikes. In this approach, it needs three times the investment to build three separate roads between City A and City B. Build several lanes on a single multi-lane highway and segment them into three groups of lanes in either direction, in such a way that traffic cannot switch from one group of lanes to another except at designated exits. Different speed limits and toll levels can be set up for each set of lanes, independent of the others. 5G Network Slicing The second approach here is like the network slicing approach, where the same physical network or general-purpose multi-lane highway caters to different specific needs and provides sufficient isolation for each set of users. Network slicing essentially helps to extend the concept of virtualization, which is quite prevalent in enterpri