L2 tor switch graphics1/7/2023 ![]() The network core (also called the core network) is the central component of the network as a whole. Let’s look at these three layers in turn. In terms of the OSI (Open Systems Interconnection) model, which divides the network into a data link layer (L2) and network layer(元), among others, the Access-Aggregation-Core network topology straddles layers, as seen in the graphic. ![]() These routers are located between the core and the internet on the scheme below. Edge routers are connected to the core to provide access from/to WAN (wide area network) and the internet. In this topology, servers are connected to switches in the access layer. ![]() ![]() This topology breaks down into three primary layers: the core layer, the aggregation or distribution layer, and the access layer.
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