What is the same LAN?
1. On the same layer 2 or layer 1 device, that is, connected to the same switch or the same hub;
2. The IP addresses are in the same segment, such as : 10.178.0.222 and 10.178.1.212 are two IP addresses, and their subnet masks are both 255.255.0.0.
LAN Small, as large as the connection between a building and an adjacent building, as small as the connection between offices. Compared with other networks, the LAN itself has faster transmission speed, more stable performance, simple framework, and closed nature, which is why many organizations choose it. The local area network itself is roughly composed of three major parts: computer equipment, network connection equipment, and network transmission media. Computer equipment includes servers and workstations, and network connection equipment includes network cards, hubs, and switches. The network transmission medium is simply Network cable is composed of three major components: coaxial cable, twisted pair and optical cable.
A local area network is a private network, usually within or near a building, such as a home, office, or factory. Local area networks are widely used to connect personal computers and consumer electronic devices, allowing them to share resources and exchange information. When LANs are used in companies, they are called enterprise networks. A local area network connects various computers, external devices and databases in a certain area to form a computer communication network, and connects to local area networks or databases in other places through dedicated data lines to form a larger information processing system. LAN connects network servers, network workstations, printers and other network interconnection devices through network transmission media to achieve system management files, share application software, office equipment, send work schedules and other communication services. The LAN is a closed network, which can prevent information leakage and external network virus attacks to a certain extent, and has high security. However, once an incident such as a hacker attack occurs, it is very likely to cause the entire LAN to be paralyzed, and all work within the network will be unable to do so. Conduct or even leak a large number of company secrets, causing serious damage to the company's business development. In 2017, the country promulgated the "Cybersecurity Law of the People's Republic of China", which officially came into effect on June 1. It clearly stipulates network security and information security from a legal perspective, and puts forward corresponding requirements for network operators and users. Improve the security of network use. Recommended tutorial: "PHP
"The above is the detailed content of What counts as the same LAN?. For more information, please follow other related articles on the PHP Chinese website!