Which WAN topology is most appropriate for a centrally located server farm with several satellite branches?
- hub and spoke
- full mesh
Explanation: Star is the most popular topology for Ethernet topology but hub and spoke is the most appropriate WAN topology.
In a Hub-and-spoke network topology, one physical site act as Hub (Example, Main Office or Head Quarter), while other physical sites act as spokes. Spoke sites are connected to each other via Hub site. In Hub-and-spoke topology, the network communication between two spokes always travel through the hub (except when using DMVPN Phase II or Phase III where spokes can communicate with each other directly). The networking device at Hub site is often much more powerful than the ones at spoke sites.
Hub and spoke is an ideal topology when most of the resources lie at the Hub site and the branch sites only need to access to the Hub.
Note: Although some books may say Hub-and-spoke and Star topologies are the same but in fact they have difference. When talking about Hub-and-spoke we often think about the communication between Hub site and Spoke sites. When talking about Star we think about the communication between end devices.
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