Traditional carriers and new operators, all eyes are gathered in the large enterprise customer market. Compared with the traditional FR / ATM VPN terms, IP VPN provides a more affordable and flexible manner, can more easily expand the network with other business partners, enabling operators in the huge market and fierce competition take the lead. With the entire telecom network of the development of IP, VPN IP of the turning technology. IP VPN technology has gone through three stages. The third phase started from the first half of 2001, based on MPLS / QoS for IP VPN has become a global phenomenon. In Europe, more than half of operators announced they will use this technology in Asias major carriers, MPLS technology is more and more attention.
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