Hardware: including computers, routers, switches, modems and other hardware devices, used to transmit and process data in the network.
1. software: including operating system, network protocols, network services, application programs and other software, used to control the operation of network hardware devices and provide various network services.
2. Protocol: The network protocol specifies the transmission mode and processing mode of data in the network. Common protocols are TCP/IP protocol, HTTP protocol, FTP protocol and SMTP protocol.
3. Topology: Network topology refers to the physical connection between devices in the network. Common topologies include star topology, bus topology and ring topology.
4. Network services: Network services are various applications in the network, including e-mail, file transfer, remote login, web browsing and other services.
5. Security mechanism: Network security is an important aspect of the network, including firewall, encryption technology, identity authentication, access control and other security mechanisms to protect data and equipment in the network from attacks and threats.
In a word, computer network is a complex system composed of hardware, software, protocols, topology, network services and security mechanisms. These components interact to realize the functions of data transmission, processing, storage and management in the computer network.
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