An Example of Route Diversity
Head
Office
ATM Ring Around
the City
You can see in Figure 11.10 that the head office now has three possible
points of access to the metropolitan WAN, and two possible points into the
branch office.These multipoint facilities allow for emulated LAN protocols when
ATM is used for both buildings. Also notice the building access to the ATM ring;
those connecting lines are at actual locations on the building structure to permit
diversified cable routing to and from the building structure. If a cable break were
to occur, communications would continue no matter where the location of the
cable break was, because the other circuits provide continuous access.
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Figure 11.10 An Example of Route Diversity
Head
Office
ATM Ring Around
the City
Branch
Office