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Leased Line or Private Line |
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- Inflexible - integrating remote-access users requires additional infrastructure.
- Not cost-effective – dedicated circuits are almost always the high-cost solution. Pricing based on distance and bandwidth results in premium charges, even during low-usage periods.
- Not scalable – meshing together multiple sites is not economically practical.
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Internet-based VPNs |
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- Access is provided over the public network, which makes this solution less secure.
- Configuring a full mesh network is complex.
- Quality of Service (QoS) can be a problem for advanced applications, especially when using multiple Internet Service Providers (ISPs).
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Frame Relay |
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- This option is inherently unsuitable and costly to add advanced, delay-sensitive and value-added applications. Multiple permanent virtual circuits (PVCs) are required between sites to differentiate application performance and routing.
- Frame Relay does not cost-effectively scale to support peer-to-peer applications or full meshing.
- Considerable resources must be dedicated to network management if an enterprise wants to achieve the any-to-any connectivity it requires.
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