What are the three main functions of a computer network? What are the components of a computer file name?

A computer is a system that connects two or more computers for communication. The most famous computer network is the Internet. Computer networks support a large number of applications and services, such as access to the World Wide Web, shared file servers, printers, email, and instant messaging. So computers have changed the information age for people, don't you think?

Contents of this article

1. What are the three main functions of computer networks?

2. What does a computer file name consist of?

3. What certificates are there for computer network security?

What are the three main functions of computer networks?

The three main functions of computer networks are data communication, resource sharing, and distributed processing. The details are as follows:

1. Data communication is the most basic function of computer networks. It is used to quickly transmit various information between computers and terminals, and between computers, including text letters, news messages, consulting information, pictures, newspaper pages, etc.

2. Resource sharing: "Resources" refer to all software, hardware and data resources in the network. "Sharing" means that all users in the network can enjoy these resources in part or in full.

3. Distributed processing: When a computer is overloaded or is processing a certain task, the network can transfer the new task to an idle computer to complete. This processing can balance the load of each computer and improve the real-time processing of problems.

A computer network, or network for short, is a system that uses communication equipment and lines to connect multiple computer systems with different geographical locations and independent functions, and uses fully functional network software to realize network hardware, software, resource sharing and information transmission. Simply put, it is a system that connects two or more computers for communication. The most famous computer network is the Internet. Computer networks support a large number of applications and services, such as access to the World Wide Web, shared file servers, printers, email, and instant messaging.

What does a computer file name consist of?

A computer file name consists of the file's main name and extension.

A file is a set of named related information recorded on a storage medium. It is not the same as a file written on paper. A file can be text, a picture, a movie, or an application. Each file must be given a name, which is called a file name.

The file name is divided into two parts, separated by a dot in the middle. The part after the dot is the last name of the file, called the extension. The part before the extension is the main name of the file. As a 64-bit operating system, Windows 7 supports long file names, with a maximum length of 256 characters, equivalent to 128 Chinese characters.

Vertical bars, slashes, less-than signs, greater-than signs, colons, quotation marks, question marks, and asterisks are not allowed in file names. Files of the same type have the same extension, while files of different types have different extensions.

What certificates are there for computer network security?

1. The network engineer certificate is an intermediate qualification in the software examination and is valid nationwide. Qualified personnel who pass this examination can plan and design network systems and install and debug network equipment hardware and software according to the requirements of the application department, operate, maintain and manage network systems, and manage network resources efficiently, reliably and safely; as network professionals, they can provide technical support and guidance for system development.

2. Hardware Maintenance Engineer Certificate Learn and master the basic knowledge of microcomputer hardware and PC assembly and maintenance technology, be familiar with the manifestations and judgment methods of various hardware failures, be familiar with various PC operating systems and commonly used software, have problem analysis capabilities, be able to formulate detailed daily maintenance and technical support technical books, and track the implementation of accepted maintenance projects.

3. National Computer Grade One Certificate The first-level certificate indicates that the holder has basic computer knowledge and preliminary application ability, masters the use of office automation software such as word and table processing, spreadsheets and presentations, and basic skills in Internet application, and has the ability to engage in secretarial and office information computerization work in government agencies, enterprises and institutions.