What about network availability?

Since VPNs rely on a public network to connect PCs, they are often at the mercy of Internet service providers. Equipment problems can plague ISPs, or even the root servers that make up the core of the Internet, which means outages are always a possibility.

Lately, ISPs are trying to improve the reliability of their networks by making them more redundant and upgrading their infrastructure, but few will offer 100 percent availability. Some providers will offer refunds or credits to compensate for any downtime that might be experienced. Companies must be realistic, and take into account the possibility of downtime when setting out on any endeavor.