M&S Global LLC aims to design an efficient WAN network to connect its metropolitan locations across large geographical areas like cities and countries. The WAN network will connect multiple LANs using Ethernet and act as a single LAN segment. It will utilize high-speed layer 2 switches and provide full mesh connectivity independent of higher layers. The WAN design will offer secure, segmented networking with services from 128 kbps to 1Gbps using technologies like Ethernet, ATM, DSL and more.

1. CIS210 White Paper Project Building A WAN Network

15. Along with the above options when planning for its WAN network design M& S Global LLC also can go in for WAN virtual circuits that are logical circuits that will be created within a shared network between two network devices. There are two types of virtual circuits that can be made and they are the switched virtual circuits or the SVC’s and the permanent virtual circuits or the PVC’s.

19. The router is configured in such a manner to initiate the call when certain criteria are met like a particular type of network traffic that requires to be transmitted. When the connection is made the traffic passes over the line and the router configuration also specifies an idle timer that also tells the router to drop the connection when the circuit has remained idle for a particular period of time. The dial backup is another manner of configuring the DDR but in this system the switched circuit is also used to provide the backup service for another type of circuit like the point to point or the packet switching. Here the router is configured in such a manner that when a failure is detected on the primary circuit the dial backup line is initiated.

20. The dial back up line then supports the WAN connection until the primary circuit is restored. When this occurs the dial backup connection is then terminated. When the company is going in for the WAN network design it requires using those devices that are specific to the WAN network and environment. The materials that require to be used are the WAN switches, the access servers, the modems, the CSU’s and the DSU’s along with the ISDN terminal adapters that will be subsequently discussed. The other devices that are normally found in the WAN networks that are used in its implementation are routers, ATM switches and multiplexers.