These networks are often established by service providers that then lease their WAN to businesses, schools, governments or the public. These customers can use the network to relay and store data or communicate with other users, no matter their location, as long as they have access to the established WAN. Access can be granted via different links, such as virtual private networks VPNs or lines, wireless networks, cellular networks or internet access. For international organizations, WANs allow them to carry out their essential daily functions without delay.
Certified network professionals help organizations maintain their internal wide area network, as well as other critical IT infrastructure. There are many different forms of area networks, but one of the most common networks outside of WANs is the local area network, or LAN.
Whereas WANs can exist globally, without ties to a physical location through the use of a leased network provider, LANs exist within a limited area. Two common examples of LANs are ethernet and wireless networks. Other forms of telecommunication networks include the following:. LANs would allow organizations to work within their building, but growth to outside areas — either different cities or even different countries — would not be possible because the associated infrastructure would be cost prohibitive for most organizations.
As organizations grow and become international, WANs allow them to communicate between branches, share information and stay connected.
When employees travel for work, WANs allow them to access the information they need to do their job. WANs also help organizations share information with customers, as well as partner organizations, such as B2B clients or customers.
However, WANs also provide an essential service to the public. Figure 7. However, new developments in broadband wireless technology are available that provide improved connectivity: municipal WiFi Worldwide Interoperability for Microwave Access WiMAX cellular. Most of these networks are provided to allow the emergency services to access data services when attending an incident, but often allow residents to access the network for Internet connectivity too.
Figure 8. The WiMAX standard WiMAX uses a network of towers, similar to those used for cellular telephones, which provide a broadband connection to customers within 50km. Figure 9. Figure Before considering how data is sent to and from the WAN, we will examine how devices within the home network exchange data. Consider the home network shown below, where PC1 is sending a file to a printer connected to the network: Figure Tweet Share Email. In This Article. How a WAN Works. Leased Lines. Problems With Wide Area Networks.
Was this page helpful? Thanks for letting us know! Email Address Sign up There was an error. Please try again. You're in! Thanks for signing up. There was an error. Tell us why! More from Lifewire. How to Connect a Router to the Internet. Visual Index of Computer Networking Topics.
Introduction to Business Computer Networks. Internet Connection Alternatives for Home Networks. What Is a Default Gateway in Networking? Your Privacy Rights. To change or withdraw your consent choices for Lifewire.
0コメント