Data Centers

The importance having a data center housing your data in a secure environment where you are able to access your data drives regularly, 24 hours dialy, simultaneously with regulated tape backups and weekly data pickups for the purpose of housing data off site in multiple locations for security purposes. This can help significantly mitigate risks from losing your data, and being assured that you have backups at different locations. These backups are secure and should be encrypted and password protected.

A Data Center planning strategy should take place to determine the exact needs that help support sustainability for disaster recovery related issues. Once it’s set in place according to your needs, you are ready and steady. It’s like playing a process, over and over, consistent, that is exactly what you want for your needs to be met accordingly.

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Provider-provisioned VPN building-blocks

According Wikipedia, Depending on whether a provider-provisioned VPN (PPVPN)[clarification needed] operates in layer 2 or layer 3, the building blocks described below may be L2 only, L3 only, or combine them both. Multiprotocol label switching (MPLS) functionality blurs the L2-L3 identity.[citation needed][original research?]

RFC 4026 generalized the following terms to cover L2 and L3 VPNs, but they were introduced in RFC 2547.[14] More information on the devices below can also be found in Lewis, Cisco Press.

RFC 4026 generalized the following terms to cover L2 and L3 VPNs, but they were introduced in RFC 2547.[14] More information on the devices below can also be found in Lewis, Cisco Press.[15]

Customer (C) devices
A device that is within a customer’s network and not directly connected to the service provider’s network. C devices are not aware of the VPN.

Customer Edge device (CE)
A device at the edge of the customer’s network which provides access to the PPVPN. Sometimes it’s just a demarcation point between provider and customer responsibility. Other providers allow customers to configure it.

Provider edge device (PE)
A PE is a device, or set of devices, at the edge of the provider network which connects to customer networks through CE devices and presents the provider’s view of the customer site. PEs are aware of the VPNs that connect through them, and maintain VPN state.

Provider device (P)
A P device operates inside the provider’s core network and does not directly interface to any customer endpoint. It might, for example, provide routing for many provider-operated tunnels that belong to different customers’ PPVPNs. While the P device is a key part of implementing PPVPNs, it is not itself VPN-aware and does not maintain VPN state. Its principal role is allowing the service provider to scale its PPVPN offerings, for example, by acting as an aggregation point for multiple PEs. P-to-P connections, in such a role, often are high-capacity optical links between major locations of providers.

Routing

According Wikipedia, Tunneling protocols can operate in a point-to-point network topology that would theoretically not be considered a VPN, because a VPN by definition is expected to support arbitrary and changing sets of network nodes. But since most router implementations support a software-defined tunnel interface, customer-provisioned VPNs often are simply defined tunnels running conventional routing protocols.

Authentication

According to Wikipedia, Tunnel endpoints must be authenticated before secure VPN tunnels can be established. User-created remote-access VPNs may use passwords, biometrics, two-factor authentication or other cryptographic methods. Network-to-network tunnels often use passwords or digital certificates. They permanently store the key to allow the tunnel to establish automatically, without intervention from the user.