VPNs remain a bit touchy and depend on specific hardware configurations.

VPN 仍然有些难以处理，并且需要依靠特别的硬件配置。

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The service provider can create multiple VPNs using the same core network.

服务提供者能建立使用相同核心网络的多个VPN。

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And VPNs can simplify network operations, significantly reducing recurring costs.

vpn还能简化网络操作、大大降低重复的成本。

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"So most people encrypt using external devices like VPNs or tools like 'stunnel, '" Goldsmith says.

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This simple error can be avoided with properly activated remote swiping and by using secure VPNs.

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Cisco provides network security products such as virtual private networks (VPNs) and firewalls.

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