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CCNA ICND2 640-816 Official Cert Guide, Third Edition by Wendell Odom

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Chapter 17. Virtual Private Networks

A company with one main site and ten remote sites could buy ten T1 lines, one each from the central site to each remote office. A more cost-effective solution would be to use Frame Relay. However, especially because the remote sites often need access to the Internet, it is even more cost effective to ...

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