In the late 19th century, telegraph and telephone technology appeared. In 1920, radio broadcasting and television were also produced accordingly. In 1946, electronic computers came out. Telecommunication networks, radio and television networks, and computer networks are not classified at the beginning, but are gradually formed in the continuous development of technology and continuously accompanied by political and economic influences from multiple perspectives. They are 各有侧重also developing 互相依赖in concert . It's OK in some ways 相互替代.
Communication technology VS computer technology
| Communication technology | computer technology | |
|---|---|---|
| Technical point of view | Telecommunications technology is developed from telegraph and telephone technology. It is communication using wired electricity, radio, light or other electromagnetic systems 信号传递. For example, 1~5G (the first to the fifth generation of mobile communication technology, research how to make the signal better and faster). Therefore, its application is mostly to study how to realize the physical transmission of information. |
Computer technology in a narrow sense is a computer, and in a broad sense it also refers to a computer network, which is a network formed by interconnecting (that is, communicating) machines with certain information processing capabilities. More emphasis is on the abstraction of information (abstraction here refers to the symbolic representation that corresponds to the materialization of electromagnetic signals and is easier for people to understand) and research 信息的数字化后的协议. Therefore, most of its applications are to study how to achieve information interaction. |
| Professional course angle | The characteristic course of communication major is signal (including modulation and demodulation, coding and decoding), electronic circuit, information system and other mathematical knowledge | The special courses of computer major are more mathematical knowledge of programming, database, computer principle and so on. |
| Common company | Companies involved in the communications industry, including manufacturers Huawei, ZTE, Nokia, Qualcomm, the flames of Datang and other communications equipment, and China Mobile, China Unicom, China Telecom, China and other radio and television operators 1 . | Computers are involved in the Internet industry, including companies such as BAT. |
| Resource management | The communication field is responsible for the division of frequency bands. | The computer field involves the distribution of IP, AS, domain names, etc. |
| standardization | The standardization organization is ITU-T (Internetional Telecommunication Union, International Telecommunication Union). Founded in 1865, it is an agency of the United Nations that manages spectrum resources. | The standardization organization is IETF (The Internet Engineering Task Force), which is a loose, self-disciplined, and voluntary international non-governmental technology organization. It was established at the end of 1985. Implementation includes IP protocol, TCP protocol, DNS protocol, routing protocol, etc. More emphasis is placed on communication protocols and standards above the circuit. |
Triple play
The integration of the three networks refers to the telecommunications network, the Internet, and the cable television network (the television network is a network specially built for the broadcast and television system, and the business is more exclusive, and the focus is on 广播电视业务) The three major networks have been technologically transformed, and the network layer uses a unified IP protocol In order to achieve interconnection and form seamless coverage, so as to realize the interconnection and interoperability of services and applications, industry regulations and policies are gradually becoming unified instead of physical integration. Among them, taking the video service as the core is the key factor to realize the integration of the three networks.
After the integration of the three networks is achieved, people's homes do not need a line for TV and a line for telephones, and all services of a line can be obtained. In addition to saving resources, the triple play has also realized that the three services of data, sound, and image can be served by one network and one platform, which provides space for business innovation and brings new economic growth points for industrial development.
references
https://www.zhihu.com/question/314835771 [Knowledge] What is the difference between a computer network and a communication network?
The public account approached communication: the history of communication development
http://www.360doc.com/content/20/0413/00/37668484_905576610.shtml [Douban] Internet technology talk (3): What is the difference between the Internet and the telecommunication network
https://zhuanlan.zhihu.com/p/74393566 [Knowledge] Format: What is triple play?
Communication service company that provides fixed telephone, mobile telephone and Internet access] ↩︎