200-901 Cisco Platforms and Development Practice Question
A network automation engineer needs to retrieve the Layer 2 topology for a specific VLAN from Cisco DNA Center. Which API endpoint should be used?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
GET /dna/intent/api/v1/topology/l2/{vlanID}
The endpoint GET /dna/intent/api/v1/topology/l2/{vlanID} is used to retrieve Layer 2 topology for a VLAN.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
GET /dna/intent/api/v1/issues
Why it's wrong here
The issues endpoint returns assurance problems and their details, not topology links, so no VLAN adjacency can be derived. It is tempting because issues reference affected devices and VLANs, making it the right call when you want to list open faults, their severity, or the categories of network health problems.
- ✗
GET /dna/intent/api/v1/site
Why it's wrong here
The site endpoint returns site hierarchy and building/floor metadata, not Layer 2 links, so it cannot map VLAN adjacencies. It is tempting because sites group devices geographically and are the correct choice when you need to enumerate locations, assign devices to a site, or query site health rather than topology.
- ✗
GET /dna/intent/api/v1/network-device
Why it's wrong here
The network-device endpoint returns device inventory records, not topology links, so it cannot supply per-VLAN Layer 2 adjacency. It is tempting because it lists every managed device and their interfaces, which is the right call when you need hostnames, management IPs, software versions or reachability status rather than connection data.
- ✓
GET /dna/intent/api/v1/topology/l2/{vlanID}
Why this is correct
The DNA Center topology API exposes layer 2 topology per VLAN through the intent path with the vlanID path parameter, returning nodes and links for that broadcast domain. This satisfies the stem's requirement to retrieve Layer 2 topology scoped to a specific VLAN.
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