A WAN diagram visually represents a wide area network that connects local area networks. LANs allow multiple computers to connect to a single server, providing a more robust audit trail. The scope and legend are important in creating a WAN diagram, which can be drawn using architecture software.
A WAN diagram is used in project management, system documentation, and information technology architecture documents to provide a visual representation of the network. Wide area networks (WAN) cover a large physical area. Many WANs cover entire buildings, cities, states or regions. The main purpose of a WAN is to connect local area networks or LANs to each other. A LAN is typically a network limited to a specific business, floor, or home.
Networks are used to connect multiple computers together, to each other or to a central server. In the initial design, the computers were linked together. This allowed users to share files and printers. However, this design is limited to a very small number of computers and presents unique challenges in identifying who has accessed specific documents, file sharing permissions, and related operational issues.
The most common type of network is a LAN which allows multiple computers to connect to a single server. The server contains all the programs, files and drivers for the various printers and related equipment. Each user logs into their own computer and is able to access shared programs and files based on their profile. This type of system provides a much more robust audit trail and can easily be backed up on a regular basis, since all data is on one computer.
A WAN diagram typically includes multiple connections to LANs, both hard-line and wireless. When creating this type of diagram, it is very important to clearly indicate the scope and legend. The scope indicates what will be included in the diagram. For example, a WAN diagram for a specific company is usually limited to equipment purchased and operated by that company. However, a WAN provided by an Internet Service Provider may cover a larger geographic area and should include the competitor’s network.
The legend is very important, as specific information about each network should be provided for clarity. Common information to include in the legend is signal strength, cable type, power connections, outer limits of network access, outlets, and dead lines. Many companies also include an indication of the ownership status of the lines: leased or owned. This is very important in a WAN diagram, as this information is used to justify lease costs.
The most common way to draw a WAN diagram is to use architecture software. This type of tool is best used for complex drawings that need to indicate the physical location of multiple elements and the physical relationship between one element and another. For example, the WAN diagram should include indications of power outlets, even though they are not directly related to the WAN itself.
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