As access switches have direct visibility into devices that connect to them, security access checks, such as 802.1x authentication, and QoS traffic classification are usually performed at this tier. Switches at the access layer connect to the distribution layer switches and should not be connected to each other. The access layer requires high-port density capable to deliver Power-over-Ethernet (POE). LAN DesignĬampus networks design defines the following tiers or layers:Īccess tier provides connectivity for the end-users. Other topics that will be covered in this post include data center leaf-and-spine architecture, WAN topologies, small office/home office networks, and comparison between on-premises and cloud environments.
The content is still relevant, so we will provide only summary information here for completeness. We wrote a blog post about 2-tier and 3-tier campus network architecture, which is one of the topics of the older version of the CCNA exam.
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