Multicasting is a networking technology that allows data such as streaming audio and video to be sent to multiple users at once over a single network connection. Instead of broadcasting the same data to every user on the network, multicasting sends the data only to those who want to receive it, thus reducing network traffic and improving efficiency.

Hardware is a physical component or device, such as the computer‘s internal components and peripherals. Software is a program or set of instructions that enables the hardware to perform a specific task. Hardware is tangible and software is intangible. Hardware can be seen and touched, while software exists only in a digital form. Hardware must be installed and maintained while software can be updated and modified easily. Finally, hardware is much more expensive than software.

DMVPN is a type of VPN that uses dynamic Multipoint Virtual Private Network (MVPN) tunnels in order to provide secure communication between multiple sites over the public Internet. MPLS is a type of technology used by networks to forward packets over the Internet and eliminate the need for routers to examine each packet header to determine where to send the packet next. MPLS creates a virtual private network (VPN) over an IP–based network. DMVPN provides a dynamic–multipoint connection for remote locations, while MPLS creates a dedicated point–to–point connection that is designed for large–scale networks with multiple endpoints.