As your business develops, you might wish to consider other networks such as wide area networks (WANs), virtual private networks (VPNs), intranets and extranets. These networks each offer different business benefits, such as linking together systems in different offices, allowing remote workers to access your office systems securely, or providing up-to-date information for your staff and business partners.

WANs are used by companies with offices at different locations. The WAN connects different local area networks together, into a more complex network. You will need to use client/server networks, which are based around central server computers, so that you can connect the various servers over a telecommunications network. WANs use cables/lines that are leased from a telecoms company.

A VPN allows the user to connect across the Internet to the business' private network. It creates a secure link between the remote worker's computer and the central system. A VPN can be cheaper to use than leased lines or domestic-type broadband connections.

Many businesses now build internal networks more commonly known as an intranet. These intranets store information on a central system at a private Internet address. Employees can access business information by connecting to the Internet, making it particularly useful for employees who travel or work from home. You will need to invest in the design and management of the intranet. The information in it must be accurate and up-to-date so users will have confidence in it. One way of ensuring this is to use a content management system to update information on the intranet

Businesses can also open up certain areas of their intranets to partners, such as suppliers and customers, typically with a password. This is an extranet. For example, a business can let clients track the progress of their orders, and the payment of suppliers online can be linked directly to the business accounts system.