Hierarchical Model – Access Layer
The access layer is where users and hosts connect into the network.
Switches at the access layer typically have the following characteristics:
• High port density
• Low cost per port
• Scalable, redundant uplinks to higher layers
• Host-level functions such as VLANs, traffic filtering, and QoS
In an 80/20 design, resources are placed as close as possible to the users that
require them. Thus, most traffic will never need to leave the access layer.
In a 20/80 design, traffic must be forwarded through higher layers to reach
centralized resources.
(Reference: CCNP Switch 642-813 Official Certification Guide by David Hucaby. Cisco Press)
The access layer is where users and hosts connect into the network.
Switches at the access layer typically have the following characteristics:
• High port density
• Low cost per port
• Scalable, redundant uplinks to higher layers
• Host-level functions such as VLANs, traffic filtering, and QoS
In an 80/20 design, resources are placed as close as possible to the users that
require them. Thus, most traffic will never need to leave the access layer.
In a 20/80 design, traffic must be forwarded through higher layers to reach
centralized resources.
(Reference: CCNP Switch 642-813 Official Certification Guide by David Hucaby. Cisco Press)
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