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Since the late 1990s, the popularity of site-to-site VPN has risen dramatically, especially as broadband Internet has spread and costs have come down. However, while site-to-site VPN has replaced many leased lines (and frame relay connections), it is now facing a major challenge from Multiprotocol Label Switching (MPLS). Download this article, which contains a handy comparison chart, to learn what MPLS is and how its features and functionality stack up against site-to-site VPN connectivity.
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