An asymmetric deployment describes a network with a network gateway device at a single central location (usually within a data centre) to provide web traffic acceleration to connecting clients.
This is different from a symmetric deployment, which describes a network with network gateway devices both at a central location (e.g. a data center) and at one or more remote locations (e.g. a regional office).
Asymmetric deployments are more cost-effective, but symmetric deployments provide additional web acceleration by reducing traffic latency, because they keep traffic local between client and resource (for unchanging cacheable content). Choosing an asymmetric or symmetric deployment strategy is usually based on business requirements and cost considerations.