This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- ROAS uses a router with subinterfaces and the `encapsulation dot1q` command to route between VLANs over a single trunk link.

- SVI uses a Layer 3 switch's internal routing capabilities by creating virtual interfaces (`interface Vlan`) that act as default gateways.

- A common CCNA exam trap for ROAS is attempting to assign an IP address to a subinterface before specifying the 802.1Q encapsulation.

- For an SVI to be active, the `ip routing` command must be enabled globally, the VLAN must exist with an active port, and the interface must not be shut down.

- SVIs offer superior performance to ROAS because routing is handled in hardware, avoiding the bottleneck of an external router link.

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