A network node is an essential part of any network topology, as it serves as the connection point between different branches of the network. In the case of cables, a network node is a physical device that connects two or more cables together. It could be a terminal, a switch, or any other type of connection.
Most commonly, network nodes are used to connect cables from different parts of a network, such as from one side of a building to the other. This can be done by connecting a cable from one side of the building to a network node, and then connecting another cable to the same node on the other side of the building. This connection allows data to travel between the two locations without having to physically cross the building.
Network nodes can also be used to create a backbone in a switch network. In this type of network, the nodes are used as the main points of connection between the various parts of the network. This allows for data to be sent between the different nodes and branches of the network without having to go through any other intermediate devices.
In addition to connecting different parts of a network, network nodes can also be used to create standing or stationary waves. Standing or stationary waves are produced when two or more signals of the same frequency coincide in the same place. As the amplitude of the wave reaches a minimum at the point of intersection, this point is referred to as a node.
In conclusion, network nodes are essential for any network topology, as they provide the necessary connection points between different parts of a network. By connecting cables, switches, and other devices together, network nodes allow for data to be sent and received between different parts of a network. Additionally, network nodes can be used to create standing or stationary waves, which are essential for certain types of communication.