DevNet Associate (DEVASC) v1.0Network FundamentalsMedium
A network engineer is configuring a Layer 3 switch to route traffic between multiple VLANs. The engineer enables IP routing on the switch and configures IP addresses on VLAN interfaces. Which of the following routing concepts is being implemented in this scenario?
- AStatic routing
- BPolicy-based routing
- CInter-VLAN routing
- DDynamic routing
Show answer & explanationAnswer & explanation
Correct answer: C. Inter-VLAN routing
Inter-VLAN routing is the process of routing network traffic from one VLAN to another. This is typically achieved by configuring a Layer 3 device (like a router or a Layer 3 switch) with IP addresses for each VLAN interface.
Why the other options are wrong
- A. Static routing involves manually configuring routes, not specifically routing between VLANs as a concept.
- B. Policy-based routing routes traffic based on administrator-defined policies, not just standard VLAN-to-VLAN communication.
- D. Dynamic routing uses routing protocols to automatically discover routes, but the core concept here is routing between VLANs.
Inter-VLAN Routing
Inter-VLAN routing enables communication between different VLANs, which are otherwise isolated broadcast domains.
- Requires a Layer 3 device (router or Layer 3 switch).
- Each VLAN needs a unique IP subnet and a corresponding interface on the Layer 3 device.
- Can be implemented via Router-on-a-Stick or Layer 3 switch SVI (Switched Virtual Interface).
Memory trick: Routing: 'Paths to your Destination'