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==Disadvantages==
* Requires that the host kernel be patched.
* All virtual servers share the same kernel so all must be Linux. (Because of backwards compatibility in user-space API, this does not impair use of old Linux programs/distributions. {{Citation needed}})
* No [[computer cluster|clustering]] or [[process migration]] capability is included, so the host kernel and host computer is still a single point of failure for all virtual servers.
* Networking is based on isolation, not virtualization. This prevents each virtual server from creating its own internal routing or firewalling setup.
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