IntermediatePhone
2 min
Subnet vs VLAN
NetworkingSubnettingL2/L3
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Interview Question
What is the difference between a subnet and a VLAN, and how do they relate in typical architectures?
Key Points to Cover
- Subnet is L3 IP range; VLAN is L2 broadcast domain separation
- Often 1:1 mapping but not required
- Routing happens between subnets; switching within VLANs
Evaluation Rubric
Explains subnets at Layer 334% weight
Explains VLANs at Layer 233% weight
Describes mapping and routing implications33% weight
Hints
- 💡Think: broadcast domain vs IP addressing.
Potential Follow-up Questions
- ❓What device routes between VLANs?
- ❓How do trunk ports work?
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