1.5.Hub-and-Spoke Topology
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When interconnecting multiple sites (for example, multiple corporate locations) via WAN links, a hub-and-spoke topology has a WAN link from each remote site (that is, a spoke site ) to the main site (that is, the hub site ).
1.Each remote site (that is,a spoke) connects back to a main site (that is, the hub) via a WAN link.
Benefits: Costs are reduced (as compared to a full-mesh or partial-mesh topology) because a minimal number of links is used.
Drawbacks: Suboptimal routes must be used between remote sites because all intersite communication must travel via the main site.
2.Communication between two remote sites travels through the hub site.
Benefits: Adding one or more additional sites is easy (as compared to a full-mesh or partial-mesh topology) because only one link needs to be added per site.
Drawbacks: Because all remote sites converge on the main site, this hub site potentially becomes a single point of failure.
