In a two-layer design, a WAN link is
used to interconnect separate sites, as shown in the figure. Inside the site, multiple LANs may be
implemented, with each LAN segment being its own broadcast domain. The
router at Site F becomes a concentration point from WAN links.
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Threaded
Case
Study |
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Washington
Project: The
Two-Layer Hierarchical Model
The
Washington School District WAN should be based on
a two-layer hierarchical model. Three regional
Hubs should be established-one each at the
District Office/Data Center, the Service Center,
and Shaw Butte Elementary School-in order to form
a fast WAN core network.
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