1, the traffic network can also be simply called the network. It is generally used for modeling pipeline system, transportation system and communication system. Sometimes it refers to a computer network, or a system in which the Internet is composed of related individuals, such as interpersonal network, traffic network and political network.

2. A graph composed of nodes and lines. Represents the research object and its relationship. Sometimes lines with arrows indicate that there is a certain order relationship from one node to another. The numerical values marked next to nodes or lines are called point weights or line weights, and sometimes they are not marked with numbers. In mathematical language, the network is a graph, which is generally considered as a weighted graph. In addition to the mathematical definition, the network also has a specific physical meaning, that is, the network is a model abstracted from a certain practical problem, and what kind of network is customarily called, such as switching network, transmission network, communication network, planning network, etc. In a word, the network is a model abstracted from similar problems and expressed and studied by graph theory in mathematics.

Computer network is a system that connects several autonomous computer systems distributed in different places with communication lines and communication equipment, and shares hardware, software and data resources according to the same network protocol.