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DevNet Associate (DEVASC) 200-901 Practice Test 39

Question 380

The initial implementation fails or does not meet the expected behavior. A router exposes a supported YANG configuration tree over NETCONF and the script needs to update one interface description. Which investigation should be prioritized to diagnose the problem?

  1. Inspect room creation response, roomId in the message payload and message delivery response.
  2. Inspect SDK session configuration, expiry logs and outgoing redacted headers.
  3. Inspect NETCONF hello capabilities, edit-config payload and rpc-error elements.
  4. Compare sample dependencies, API docs version and actual request/response traces.

Explanation

Correct Answer

C:

Inspect NETCONF hello capabilities, edit-config payload and rpc-error elements. These are the relevant initial evidence checks for NETCONF edit-config transaction. Intended action: Send a valid NETCONF edit-config RPC with the correct XML namespace and target datastore. Expected success condition: A successful RPC reply is followed by a get-config showing the updated description.

Incorrect Answers

A:

Inspect room creation response, roomId in the message payload and message delivery response. This investigation primarily applies to Webex create space and send message, not the current NETCONF edit-config transaction problem. Prioritize: Inspect NETCONF hello capabilities, edit-config payload and rpc-error elements.

B:

Inspect SDK session configuration, expiry logs and outgoing redacted headers. This investigation primarily applies to SDK authentication renewal, not the current NETCONF edit-config transaction problem. Prioritize: Inspect NETCONF hello capabilities, edit-config payload and rpc-error elements.

D:

Compare sample dependencies, API docs version and actual request/response traces. This investigation primarily applies to Choose API documentation over Code Exchange sample, not the current NETCONF edit-config transaction problem. Prioritize: Inspect NETCONF hello capabilities, edit-config payload and rpc-error elements.

Question 381

A Cisco network automation team has this requirement: A network platform RESTCONF GET returns 406 because the client requests text/html instead of a YANG JSON representation. Which design or implementation action best addresses it?

  1. Use the documented Catalyst Center site assignment workflow with the site and device identifiers.
  2. Call the documented Meraki network-clients endpoint with the network ID and supported time parameters.
  3. Use the SDK's supported authentication/refresh lifecycle or recreate the authorized client without exposing credentials.
  4. Use an Accept header for the documented YANG data media type and an authenticated model resource.

Explanation

Correct Answer

D:

Use an Accept header for the documented YANG data media type and an authenticated model resource. Technical reason: RESTCONF represents modeled resources over HTTP with negotiated YANG-aware media types. Verify by: The server returns a parseable YANG JSON object from the correct resource path. Deployment qualification: Supported media types and payload module prefixes depend on device implementation.

Incorrect Answers

A:

Use the documented Catalyst Center site assignment workflow with the site and device identifiers. This instead targets the different case Catalyst Center site hierarchy assignment. The described RESTCONF JSON representation header requirement specifically calls for Use an Accept header for the documented YANG data media type and an authenticated model resource.

B:

Call the documented Meraki network-clients endpoint with the network ID and supported time parameters. This instead targets the different case Retrieve Meraki connected clients from network. The described RESTCONF JSON representation header requirement specifically calls for Use an Accept header for the documented YANG data media type and an authenticated model resource.

C:

Use the SDK's supported authentication/refresh lifecycle or recreate the authorized client without exposing credentials. This instead targets the different case SDK authentication renewal. The described RESTCONF JSON representation header requirement specifically calls for Use an Accept header for the documented YANG data media type and an authenticated model resource.

Question 382

After deployment, an engineer must prove the proposed solution works. A network platform RESTCONF GET returns 406 because the client requests text/html instead of a YANG JSON representation. Which observed result is the most direct acceptance evidence?

  1. A controlled test returns device IDs from the intended controller without a handcrafted token URL.
  2. The server returns a parseable YANG JSON object from the correct resource path.
  3. The result contains expected device IDs and hostname fields from the authorized site inventory.
  4. The response includes the organization's devices across its authorized networks, not only clients on one switch.

Explanation

Correct Answer

B:

The server returns a parseable YANG JSON object from the correct resource path. Recommended implementation: Use an Accept header for the documented YANG data media type and an authenticated model resource. Why the observation matters: RESTCONF represents modeled resources over HTTP with negotiated YANG-aware media types.

Incorrect Answers

A:

A controlled test returns device IDs from the intended controller without a handcrafted token URL. That observation could confirm Catalyst Center SDK intent client, not the current RESTCONF JSON representation header case. For this case, the decisive observation is: The server returns a parseable YANG JSON object from the correct resource path.

C:

The result contains expected device IDs and hostname fields from the authorized site inventory. That observation could confirm Get device inventory from Catalyst Center, not the current RESTCONF JSON representation header case. For this case, the decisive observation is: The server returns a parseable YANG JSON object from the correct resource path.

D:

The response includes the organization's devices across its authorized networks, not only clients on one switch. That observation could confirm Meraki organization versus device endpoint scope, not the current RESTCONF JSON representation header case. For this case, the decisive observation is: The server returns a parseable YANG JSON object from the correct resource path.

Question 383

A developer is explaining the underlying technical behavior. A network platform RESTCONF GET returns 406 because the client requests text/html instead of a YANG JSON representation. Which principle is most relevant to this case?

  1. NX-API and RESTCONF are distinct programming interfaces with different request schemas.
  2. Code Exchange examples demonstrate patterns but API documentation defines the active request contract.
  3. ISE centralizes identity and network access policy decisions for supported integrations.
  4. RESTCONF represents modeled resources over HTTP with negotiated YANG-aware media types.

Explanation

Correct Answer

D:

RESTCONF represents modeled resources over HTTP with negotiated YANG-aware media types. This mechanism explains RESTCONF JSON representation header. Action: Use an Accept header for the documented YANG data media type and an authenticated model resource. Expected confirmation: The server returns a parseable YANG JSON object from the correct resource path.

Incorrect Answers

A:

NX-API and RESTCONF are distinct programming interfaces with different request schemas. This relates to NX-OS NX-API JSON command output. In the current RESTCONF JSON representation header case the operative principle is: RESTCONF represents modeled resources over HTTP with negotiated YANG-aware media types.

B:

Code Exchange examples demonstrate patterns but API documentation defines the active request contract. This relates to Choose API documentation over Code Exchange sample. In the current RESTCONF JSON representation header case the operative principle is: RESTCONF represents modeled resources over HTTP with negotiated YANG-aware media types.

C:

ISE centralizes identity and network access policy decisions for supported integrations. This relates to ISE endpoint policy and posture use. In the current RESTCONF JSON representation header case the operative principle is: RESTCONF represents modeled resources over HTTP with negotiated YANG-aware media types.

Question 384

A team does not apply the necessary control or correction. A network platform RESTCONF GET returns 406 because the client requests text/html instead of a YANG JSON representation. Which resulting failure or risk is most directly relevant?

  1. Calling arbitrary guessed methods can fail when SDK object names differ from API endpoint labels.
  2. Using a participant email as a room ID misaddresses or rejects the request.
  3. An incompatible Accept header can make an otherwise valid resource request fail.
  4. Leaf-by-leaf ACL drift bypasses the intended centralized fabric policy model.

Explanation

Correct Answer

C:

An incompatible Accept header can make an otherwise valid resource request fail. This is the direct exposure for RESTCONF JSON representation header. Mitigate with: Use an Accept header for the documented YANG data media type and an authenticated model resource. Check success by: The server returns a parseable YANG JSON object from the correct resource path.

Incorrect Answers

A:

Calling arbitrary guessed methods can fail when SDK object names differ from API endpoint labels. This risk occurs in the different Catalyst Center SDK intent client situation. For the given RESTCONF JSON representation header requirement, the directly relevant risk is: An incompatible Accept header can make an otherwise valid resource request fail.

B:

Using a participant email as a room ID misaddresses or rejects the request. This risk occurs in the different Create Webex message in known space situation. For the given RESTCONF JSON representation header requirement, the directly relevant risk is: An incompatible Accept header can make an otherwise valid resource request fail.

D:

Leaf-by-leaf ACL drift bypasses the intended centralized fabric policy model. This risk occurs in the different ACI policy endpoint distinction situation. For the given RESTCONF JSON representation header requirement, the directly relevant risk is: An incompatible Accept header can make an otherwise valid resource request fail.

Question 385

The initial implementation fails or does not meet the expected behavior. A network platform RESTCONF GET returns 406 because the client requests text/html instead of a YANG JSON representation. Which investigation should be prioritized to diagnose the problem?

  1. Inspect host GUID, event type, time filter and API response details.
  2. Inspect SDK reference, returned data type, target controller URL and auth context.
  3. Inspect Accept, Content-Type, URL path and response code alongside API docs.
  4. Inspect site ID, device UUID, assignment task status and resulting inventory record.

Explanation

Correct Answer

C:

Inspect Accept, Content-Type, URL path and response code alongside API docs. These are the relevant initial evidence checks for RESTCONF JSON representation header. Intended action: Use an Accept header for the documented YANG data media type and an authenticated model resource. Expected success condition: The server returns a parseable YANG JSON object from the correct resource path.

Incorrect Answers

A:

Inspect host GUID, event type, time filter and API response details. This investigation primarily applies to Secure Endpoint host event triage, not the current RESTCONF JSON representation header problem. Prioritize: Inspect Accept, Content-Type, URL path and response code alongside API docs.

B:

Inspect SDK reference, returned data type, target controller URL and auth context. This investigation primarily applies to Catalyst Center SDK intent client, not the current RESTCONF JSON representation header problem. Prioritize: Inspect Accept, Content-Type, URL path and response code alongside API docs.

D:

Inspect site ID, device UUID, assignment task status and resulting inventory record. This investigation primarily applies to Catalyst Center site hierarchy assignment, not the current RESTCONF JSON representation header problem. Prioritize: Inspect Accept, Content-Type, URL path and response code alongside API docs.

Question 386

A Cisco network automation team has this requirement: A Python utility must list managed network devices from Cisco Catalyst Center after obtaining access credentials. Which design or implementation action best addresses it?

  1. Send the documented NX-API request for the supported show operation and parse its JSON response.
  2. Query the supported Secure Endpoint event API with host and time filters for threat events.
  3. Request the documented device inventory endpoint or supported SDK operation and handle its returned device collection.
  4. Use documented XDR incident APIs with approved scopes to retrieve correlated security context.

Explanation

Correct Answer

C:

Request the documented device inventory endpoint or supported SDK operation and handle its returned device collection. Technical reason: Cisco controller APIs expose managed-device resources to software clients. Verify by: The result contains expected device IDs and hostname fields from the authorized site inventory. Deployment qualification: API schema and token acquisition differ among Catalyst Center software versions.

Incorrect Answers

A:

Send the documented NX-API request for the supported show operation and parse its JSON response. This instead targets the different case NX-OS NX-API JSON command output. The described Get device inventory from Catalyst Center requirement specifically calls for Request the documented device inventory endpoint or supported SDK operation and handle its returned device collection.

B:

Query the supported Secure Endpoint event API with host and time filters for threat events. This instead targets the different case Secure Endpoint host event triage. The described Get device inventory from Catalyst Center requirement specifically calls for Request the documented device inventory endpoint or supported SDK operation and handle its returned device collection.

D:

Use documented XDR incident APIs with approved scopes to retrieve correlated security context. This instead targets the different case Cisco XDR incident context API. The described Get device inventory from Catalyst Center requirement specifically calls for Request the documented device inventory endpoint or supported SDK operation and handle its returned device collection.

Question 387

After deployment, an engineer must prove the proposed solution works. A Python utility must list managed network devices from Cisco Catalyst Center after obtaining access credentials. Which observed result is the most direct acceptance evidence?

  1. The result contains expected device IDs and hostname fields from the authorized site inventory.
  2. The inventory associates the device with the target campus site while its management IP remains valid.
  3. The server returns a parseable YANG JSON object from the correct resource path.
  4. A change to Gi1 does not alter Gi2 and both values can be retrieved by model path.

Explanation

Correct Answer

A:

The result contains expected device IDs and hostname fields from the authorized site inventory. Recommended implementation: Request the documented device inventory endpoint or supported SDK operation and handle its returned device collection. Why the observation matters: Cisco controller APIs expose managed-device resources to software clients.

Incorrect Answers

B:

The inventory associates the device with the target campus site while its management IP remains valid. That observation could confirm Catalyst Center site hierarchy assignment, not the current Get device inventory from Catalyst Center case. For this case, the decisive observation is: The result contains expected device IDs and hostname fields from the authorized site inventory.

C:

The server returns a parseable YANG JSON object from the correct resource path. That observation could confirm RESTCONF JSON representation header, not the current Get device inventory from Catalyst Center case. For this case, the decisive observation is: The result contains expected device IDs and hostname fields from the authorized site inventory.

D:

A change to Gi1 does not alter Gi2 and both values can be retrieved by model path. That observation could confirm YANG leaf and list semantics, not the current Get device inventory from Catalyst Center case. For this case, the decisive observation is: The result contains expected device IDs and hostname fields from the authorized site inventory.

Question 388

A developer is explaining the underlying technical behavior. A Python utility must list managed network devices from Cisco Catalyst Center after obtaining access credentials. Which principle is most relevant to this case?

  1. Cisco controller APIs expose managed-device resources to software clients.
  2. Security orchestration platforms expose normalized incident resources through supported APIs.
  3. ACI's APIC provides controller-level policy abstraction for a fabric's endpoint relationships.
  4. SDK authentication helpers manage credential exchange but do not remove token expiry.

Explanation

Correct Answer

A:

Cisco controller APIs expose managed-device resources to software clients. This mechanism explains Get device inventory from Catalyst Center. Action: Request the documented device inventory endpoint or supported SDK operation and handle its returned device collection. Expected confirmation: The result contains expected device IDs and hostname fields from the authorized site inventory.

Incorrect Answers

B:

Security orchestration platforms expose normalized incident resources through supported APIs. This relates to Cisco XDR incident context API. In the current Get device inventory from Catalyst Center case the operative principle is: Cisco controller APIs expose managed-device resources to software clients.

C:

ACI's APIC provides controller-level policy abstraction for a fabric's endpoint relationships. This relates to ACI policy endpoint distinction. In the current Get device inventory from Catalyst Center case the operative principle is: Cisco controller APIs expose managed-device resources to software clients.

D:

SDK authentication helpers manage credential exchange but do not remove token expiry. This relates to SDK authentication renewal. In the current Get device inventory from Catalyst Center case the operative principle is: Cisco controller APIs expose managed-device resources to software clients.

Question 389

A team does not apply the necessary control or correction. A Python utility must list managed network devices from Cisco Catalyst Center after obtaining access credentials. Which resulting failure or risk is most directly relevant?

  1. Firewall-rule inventory alone cannot prove what malware an endpoint observed.
  2. Confusing site IDs, devices and clients leads to mismatched inventory records.
  3. Blind port-level changes can disrupt many endpoints and leave policy intent inconsistent.
  4. Treating example code as a frozen specification can preserve deprecated endpoint assumptions.

Explanation

Correct Answer

B:

Confusing site IDs, devices and clients leads to mismatched inventory records. This is the direct exposure for Get device inventory from Catalyst Center. Mitigate with: Request the documented device inventory endpoint or supported SDK operation and handle its returned device collection. Check success by: The result contains expected device IDs and hostname fields from the authorized site inventory.

Incorrect Answers

A:

Firewall-rule inventory alone cannot prove what malware an endpoint observed. This risk occurs in the different Secure Endpoint host event triage situation. For the given Get device inventory from Catalyst Center requirement, the directly relevant risk is: Confusing site IDs, devices and clients leads to mismatched inventory records.

C:

Blind port-level changes can disrupt many endpoints and leave policy intent inconsistent. This risk occurs in the different ISE endpoint policy and posture use situation. For the given Get device inventory from Catalyst Center requirement, the directly relevant risk is: Confusing site IDs, devices and clients leads to mismatched inventory records.

D:

Treating example code as a frozen specification can preserve deprecated endpoint assumptions. This risk occurs in the different Choose API documentation over Code Exchange sample situation. For the given Get device inventory from Catalyst Center requirement, the directly relevant risk is: Confusing site IDs, devices and clients leads to mismatched inventory records.

Question 390

The initial implementation fails or does not meet the expected behavior. A Python utility must list managed network devices from Cisco Catalyst Center after obtaining access credentials. Which investigation should be prioritized to diagnose the problem?

  1. Inspect endpoint identifier, ISE authorization profile and network device enforcement logs.
  2. Inspect endpoint path, auth token exchange, pagination and device response fields.
  3. Inspect host GUID, event type, time filter and API response details.
  4. Inspect NETCONF hello capabilities, edit-config payload and rpc-error elements.

Explanation

Correct Answer

B:

Inspect endpoint path, auth token exchange, pagination and device response fields. These are the relevant initial evidence checks for Get device inventory from Catalyst Center. Intended action: Request the documented device inventory endpoint or supported SDK operation and handle its returned device collection. Expected success condition: The result contains expected device IDs and hostname fields from the authorized site inventory.

Incorrect Answers

A:

Inspect endpoint identifier, ISE authorization profile and network device enforcement logs. This investigation primarily applies to ISE endpoint policy and posture use, not the current Get device inventory from Catalyst Center problem. Prioritize: Inspect endpoint path, auth token exchange, pagination and device response fields.

C:

Inspect host GUID, event type, time filter and API response details. This investigation primarily applies to Secure Endpoint host event triage, not the current Get device inventory from Catalyst Center problem. Prioritize: Inspect endpoint path, auth token exchange, pagination and device response fields.

D:

Inspect NETCONF hello capabilities, edit-config payload and rpc-error elements. This investigation primarily applies to NETCONF edit-config transaction, not the current Get device inventory from Catalyst Center problem. Prioritize: Inspect endpoint path, auth token exchange, pagination and device response fields.

DevNet Associate (DEVASC) (200-901) Practice Tests

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