IP VPNs: Build Or Buy?: "To date, enterprises are taking the do-it-yourself approach to building IP VPNs with technologies like IPsec and SSL. However, new technologies like MPLS and the maturation of network-based VPN infrastructure provide enterprises with cost-effective and reliable IP VPN services that they can buy. So, what should your company do? Large enterprises should consider purchasing IP VPN services while small and medium-size enterprises (SMEs) should stick to an in-house approach. But ultimately, your internal IT and network staff will determine the right solution. If you lack the resources, a managed service is always a no-brainer." —Forrester Research