What is the main task of the third segment of the Public **** Network?

The main task of the third section of the public **** network is to start from learning, to change the perception of the main.

The basic task of network management is responsible for managing and ensuring the safety and stability of the company's network, servers, desktops, and other infrastructure operation, planning, design, documentation, day-to-day management, service monitoring, knowledge training, etc., for the company's information-related decision-making, purchasing to provide the information required;

To ensure that the company's workflow to develop relevant network use regulations and recommendations, and Supervise and ensure the implementation of the rules and systems by the relevant personnel; when necessary, still take care of other tasks assigned by the company, but mainly focus on IT infrastructure management.

Types of networks

1, the public switched telephone network (PSTN)

Public switched telephone network is the telephone transmission network we usually use.

2. Packet-switched data network (X.25)

China packet-switched public data network (CHINAPAC) is a kind of packet-switched network covering the whole country.

3. Digital Data Network (DDN)

Digital Data Network (DDN) is a high-bandwidth, high-quality public digital data communication network. Its channels for transmitting information are digital channels.

4, Integrated Services Digital Network (ISDN)

Integrated Services Digital Network (ISDN) with the telephone network, X.25, DDN, as is designed as a public network.