WAN links are typically shown using straight lines connecting the two endpoints. Different thicknesses or colors are used to show different data rates. Assume that the company uses the following three WAN links to connect the four locations — US–Singapore, US–Amsterdam, and Amsterdam–Mumbai. The data rate on the US–Amsterdam link is 100 Mbps to accommodate the data backup traffic. All other links are 10- Mbps links. Update the network diagram from Chapter 9 to include these WAN links. Of the WAN technologies covered in this chapter — dial-up, T-carriers, X.25, Frame Relay, ATM, and SONET, which technology is best suited to meet TrendyWidgets’s WAN needs? After the network outage following the Middle-East cable ruptures, TrendyWidgets has decided to also maintain a backup WAN capability using ISDN. Include this backup capability in your network diagram.