MPLS VPNs transport layer 2 packets across the network and encapsulate transport protocols such as ATM, Ethernet, and SONET, allowing MPLS networks to seemlessly upgrade and replace legacy layer 2 networks without requiring network reconfiguration or using protocols higher than layer 2. In comparison, layer 3 VPNs must use the layer 3 Internet Protocol (IP).

An Internet T1 (or T-1 line) is a digital, dedicated local access connection supporting data rates of 1.544 Megabits Per Second (Mbps) that can be channelized into 24 individual channels that each provide 64 Kilobits Per Second (Kbps).

Voice over IP (VoIP) sends voice data in packets using the Internet Protocol (IP) instead of analog waves as does plain old telephone service (POTS) lines.

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The main limitation on DSL bandwidth speed is the distance from the customer premise to the local telephone company central office.

Multiprotocol Label Switching (MPLS) can be used to create intelligent networks that support advanced data packet management over a single network while saving money. MPLS can be integrated seamlessly over any existing infrastructure such as IP, Frame Relay, ATM, or Ethernet and end users with different types of local access circuits may be joined together on the same network without changing their current access protocols.

A major feature of Internet over Ethernet is the ease in which you can upgrade from 1 Mbps to 1 Gbps. Simply call your Internet Service Provider (ISP) and ask for an upgrade and it can be provisioned almost in real time. This service is the future of Internet access for the foreseable future.

Asymetric DSL (ADSL) allows more bandwidth to move data toward the end user (multimedia and text) than from the end user (mostly keystrokes and mouse behavior) to the Internet.

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MPLS can be used to create highly-scalable IP networks with layer 2 level security as well as easy network configuration, management, and provisioning.