|  | 3.3 | How to Identify and Select Networking Capabilities
| 3.3.8 | One-layer network designs
Not all networks require a three-layer hierarchy. A key design decision becomes the placement of servers: They can be distributed across multiple LANs or concentrated in a central server farm location. The figure shows a distributed server design. A one-layer design is typically implemented if there are only a few remote locations in the company, and access to applications is mainly done via the local LAN to the site file server. Each site is its own broadcast domain.