A network engineer has to decide between a Layer 2 Access Layer (STP-based) and a Layer 3 Access Layer (Routed access) campus design option. Which statement must be considered for a decision to be made?

A network engineer has to decide between a Layer 2 Access Layer (STP-based) and a Layer 3 Access Layer (Routed access) campus design option. Which statement must be considered for a decision to be made?

• The STP based access option supports spanning VLANs across multiple access switches, whereas the Routed access option does not.
• The Routed access option is the best cost-effective solution.
• The STP based option does not require FHRP, whereas the Routed access option does.
• The Routed access option offers easier troubleshooting than the STP-based option.

Explanation: The Routed access design has a number of advantages over the STP-based design:

• No FHRP required – no need for FHRP protocols such as HSRP and VRRP.
• No STP required - since there are no L2 links to block, this design removes the need for STP.
• Easier troubleshooting - It offers common end-to-end troubleshooting tools (such as ping and traceroute).

The Routed access is an excellent design for many environments, but it has the same limitation as the STP-based design, in which it does not support spanning VLANs across multiple access switches. Additionally, it might not be the most cost-effective solution because access layer switches with Layer 3 routing capability might cost more than Layer 2 switches do.

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