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Essay On Wan Technologies

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As the world progresses technology everyday, the reliance on the Internet and its uses become more and more necessary. Many people connect to hundreds of applications and devices they use every single day. Behind these applications are extremely complex networks that allow users to connect in ways that expand every single day. To achieve this, companies must design their networks for secure access and reliability to allow seamless access for users. On the back-end these companies must also have a secure network in place for their offices, remote workers, and any other remote resource to access confidential materials and other sensitive matter. This can be accomplished through a variety of WAN technologies that are used in the world today. …show more content…

With frame relay the user only has to pay for the local loop and the allotted bandwidth they purchased. Since these loops are shared between many users the cost is reduced. Frame Relay provides a better alternative because it only requires a single point of access. From that point of access the Frame Relay allows the sites to connect together. On top of the overall cost, it is also much simpler to configure which results in less overhead yet again. The connections were simpler to establish because Customer Service Equipment or CPE would be configured and linked to the ISPs Frame relay switch. This allowed end user configuration management to be simple and straightforward. Besides cost savings, Frame relay is also more reliable and provides more bandwidth than private/leased lines. Frame relay provides greater flexibility versus leased lines by using Virtual Circuits or VCs. As communication is desired between locations, a connection to a Virtual Circuit is formed. In this process each end point connection uses a Data Link Connection Identifier or DLCI which acts as an “address” for the end point. Data sent through the relay is taken from the network layer of the OSI model and is then encapsulated through the data portion of the frame relay frame. Once this is done, the frame is then sent to the physical layer for delivery. Within the packet there will be an address field that includes the DLCI and checksum to show where the packet needs to go. Another alternative to a

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