The Cisco Three-Layered Hierarchical Model
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Rather, a switch is an advanced version of a hub.
A collision domain describes a portion of an Ethernet network at layer 1 of the OSI model where any communication sent by a node can be sensed by any other node on the network. This is different from a broadcast domain which describes any part of a network at layer 2 or 3 of the OSI model where a node can broadcast to any node on the network.
At the access layer, you can:- Enable MAC address filtering: It is possible to program a switch to allow only certain systems to access the connected LANs.
- Create separate collision domains: A switch can create separate collision domains for each connected node to improve performance.
- Share bandwidth: You can allow the same network connection to handle all data.
- Handle switch bandwidth: You can move data from one network to another to perform load balancing.
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