Is lan a local area network or a wide area network?

lan is the abbreviation of "Local Area Network", which means LAN; the coverage of LAN is generally within a few kilometers, and it can realize file management, application software sharing, printer sharing and other functions. When using During the process, by maintaining the security of the LAN network, data security can be effectively protected and the normal and stable operation of the LAN network can be ensured.

The operating environment of this tutorial: Windows 10 system, DELL G3 computer.

Is lan a local area network or a wide area network?

LAN is the abbreviation of Local Area Network, that is, local area network.

WAN is the abbreviation of Wide Area Network, that is, wide area network.

The following picture can help you understand the concepts of LAN and WAN:

If you think of this picture as an actual network used in real life, then the " The left part of the word LAN" is a local area network (LAN), and the right part of the word LAN is a wide area network (WAN).

Local area network, a type of network, generally covers a radius of several kilometers. Its features such as convenient installation, cost saving, and easy expansion make it widely used in various offices. The LAN can realize functions such as file management, application software sharing, and printer sharing. During use, by maintaining the security of the LAN network, it can effectively protect data security and ensure the normal and stable operation of the LAN network.

Wide Area Network (WAN), relative to LAN, is a network that is at least one level higher than LAN (similar to the superior department versus the subordinate department at work). That is, what is usually called the public network, external network, and the Internet is the largest wide area network. Local area network (LAN) refers to a computer interconnection network within a smaller range than a wide area network. This "small scope" is like a family, a school, a company, or a government department, relative to the network outside it. That is, private networks and intranets are often mentioned.

Due to the difference in scale, the two have the following obvious differences:

Structurally: The wide area network (WAN) has a complex structure, while the local area network (LAN) is relatively simple;

In terms of speed: the overall speed of the wide area network (WAN) is low, and that of the local area network (LAN) is relatively high;

Management: the management of the wide area network (WAN) is relatively difficult, but the local area network (LAN) is relatively simple;

WLAN That is, Wireless LAN (English: Wireless LAN, abbreviated as WLAN) is a local area network that does not use any wires or transmission cables to connect. It uses radio waves as the medium for data transmission, and the transmission distance is generally only a few dozen meters. The backbone network of a wireless LAN usually uses wired cables, and wireless LAN users access the wireless LAN through one or more wireless adapters. Wireless LAN is now widely used in business districts, universities, airports, and other public areas.

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