What's the difference between IP network and traditional telecommunication network?

variable-length packet information bearing mode of IP protocol;

address mode of IP network;

end-to-end congestion control mode of TCP protocol;

packet forwarding mode and cache management mode of IP network;

routing mechanism of IP network;

user access mode of IP network;

network management and operation mode of IP network.

these characteristics are born out of the fact that IP is the initial goal of computer communication network

, which also limits the main service provision mode of IP network. The design of IP network was long before the concept of multimedia became the object of commercial speculation. Essentially, it was designed for communication terminals with storage ability, calculation and processing ability, and no real-time interaction was needed. Its greatest advantage was to use computers to request information from servers. After several years of public opening, this feature of IP network has become more and more clear. With the success of the concept of multi-media

in the computer industry, the voice of realizing multimedia communication between computers is getting higher and higher. How to transform IP network to meet the requirements of multimedia communication has become a hot issue in network research and development. However, the decision of commercial operation should not only listen to the voice, but also face the actual demand and actual technical ability. From the current network laying reality, although this voice is very high, it has not formed a real demand pressure under the current technical regulations. ATM is a ready-made network that provides real-time multimedia communication much better than IP network. Although the problem of ensuring the fine quality requirements of various users is not really solved at ATM, it is solved on the ATM platform. Therefore, if the demand for real-time multimedia services has formed a scale demand, then the current target network should not be IP network, and ATM network should become a better commercial selling point.

below, we can locate the service provision target of IP network in the near future. In today's telephone network

, people can talk at any time. On the basis that TV network and broadcasting system have solved people's basic needs for news, sports and entertainment, IP network will mainly solve people's query, exchange, request and distribution of non-real-time information. Here, it is not excluded to use IP network to view and browse stored media streams. It does not rule out the use of IP network for multimedia communication, but that IP network will not, and at present there is no need to maintain the service quality of these communications like professional communication networks. In providing these services, IP network will still maintain its consistent style: if it can, users just use it; If not,

the network is not responsible.

not everyone agrees with the above network positioning. at present, there are three different basic ideas about the technical trend of IP network.

keep the existing working mode of IP network unchanged;

provide differentiated services on the IP network, but still maintain the existing style of the IP network;

provide ISDN services on the IP network.

in the author's view, the so-called idea of ensuring the quality of fine services on IP network is just a dream that those who originally developed ISDN tried to use new speculation as a theme and failed to succeed on traditional telecom networks. Dreams are always beautiful, and people are always looking forward to their dreams coming true. Let us also wish this idea success, but as a reality, it is more difficult to transform IP networks into ISDN networks than to directly promote ATM networks. Therefore, it is better to directly improve and promote ATM networks. Therefore, when considering the short-term positioning of IP networks, it is not necessary to take it seriously. What really needs careful consideration is the first two ideas.

a network is composed of nodes and lines, which represent many objects and their interrelationships. Mathematically, the network is a kind of 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 type of practical problem. In the computer field, the network is a virtual platform for information transmission, reception and sharing. Through it, the information of various points, surfaces and bodies is linked together, so as to realize the sharing of these resources. Network is the most important invention in the history of human development, which has improved the development of science and technology and human society.

before 1999, people generally thought that the network structure was random. However, after Barabasi and Watts discovered the scale-free and small-world characteristics of the network in 1999 and published their findings in the world-famous magazines Science and Nature respectively, people realized the complexity of the network.

With the help of software tools such as text reading, picture viewing, audio and video playback, downloading and transmission, games, chatting and so on, the network will bring people extremely rich life and beautiful enjoyment from the aspects of text, pictures, sound and video.

So the difference is whether it is universal or not.