350-401 Cisco DNA Center Practice Test 2 — 15 Questions

Question 1

A network engineer is configuring model-driven telemetry on a Cisco IOS-XE device that is part of a DNA Center managed fabric. The telemetry subscription configuration is:

telemetry ietf subscription 101
 encoding encode-kvgpb
 filter xpath /process-cpu-ios-xe-oper:cpu-usage/cpu-utilization
 stream yang-push
 update-policy periodic 500
 receiver ip address 10.10.10.10  port 5555 protocol grpc-tcp

What is the purpose of the 'encoding encode-kvgpb' line?

Accepted Answer

It specifies that the data should be encoded using Google Protocol Buffers (protobuf) with key-value pairs.. The 'encoding encode-kvgpb' specifies that the telemetry data should be encoded using KVGPB (Key-Value Google Protocol Buffers), which is a compact binary encoding used for efficient data transmission.

Answer

It sets the encoding to JSON format for the telemetry data.

Answer

It enables encryption of the telemetry data.

Answer

It defines the compression algorithm for the telemetry stream.

Question 2

A network engineer uses the Cisco DNA Center API to trigger a provisioning workflow for a new device. The API call returns the following JSON response:

{
  "response": {
    "taskId": "task-12345",
    "url": "/api/v1/task/task-12345"
  },
  "version": "1.0"
}

The engineer then polls the task status using the URL. Which HTTP method should be used to retrieve the task status?

Accepted Answer

GET. To retrieve the status of a task, a GET request should be sent to the provided URL. The task ID is used to query the task API endpoint.

Answer

POST

Answer

PUT

Answer

DELETE

Question 3

An engineer is writing a Python script to use the Cisco DNA Center API to assign a device to a site. The code snippet is:

import requests

url = "https://dna-center.local/dna/intent/api/v1/network-device/assign"
headers = {
    "X-Auth-Token": "token",
    "Content-Type": "application/json"
}
payload = {
    "deviceId": "device-uuid",
    "siteId": "site-uuid"
}
response = requests.post(url, headers=headers, json=payload, verify=False)
print(response.status_code)

What is a potential issue with this code?

Accepted Answer

The HTTP method should be PUT instead of POST for assigning a device to a site.. The API endpoint for assigning a device to a site typically uses a PUT method, not POST. Using POST may result in a 405 Method Not Allowed error or unexpected behavior.

Answer

The payload should include 'deviceId' and 'siteId' as a list.

Answer

The URL is missing the version number.

Question 4

Examine the following partial Cisco IOS-XE configuration:

interface GigabitEthernet0/1
 switchport mode access
 switchport access vlan 10
 ip access-group ACL_IN in
 spanning-tree portfast

What is the effect of this configuration?

Accepted Answer

The port will immediately transition to forwarding state, reducing STP convergence time for end hosts.. The configuration enables PortFast on an access port, allowing it to transition directly to forwarding state, bypassing the listening and learning phases. This is commonly used for end-host ports to avoid delays caused by spanning-tree convergence.

Answer

The port will become a trunk port and participate in VLAN trunking.

Answer

The port will use Rapid PVST+ and immediately forward after a link failure.

Answer

The port will block all inbound traffic due to the ACL.

Question 5

Consider the following configuration snippet from a Cisco IOS-XE router:

router eigrp 100
 network 10.0.0.0
 network 192.168.1.0
 passive-interface default
 no passive-interface GigabitEthernet0/0

What is the effect of the passive-interface commands?

Accepted Answer

EIGRP hellos are suppressed on all interfaces except GigabitEthernet0/0.. The command 'passive-interface default' makes all interfaces passive by default, meaning they will not send or receive EIGRP hellos. The subsequent 'no passive-interface GigabitEthernet0/0' overrides this for that specific interface, allowing EIGRP adjacency formation on it.

Answer

EIGRP hellos are sent on all interfaces, but updates are blocked.

Answer

EIGRP adjacency is formed on all interfaces except GigabitEthernet0/0.

Answer

EIGRP is disabled on all interfaces.

Question 6

Examine the following OSPF configuration on a Cisco IOS-XE router:

router ospf 1
 router-id 1.1.1.1
 network 10.0.0.0 0.255.255.255 area 0
 network 192.168.1.0 0.0.0.255 area 1
 default-information originate always metric 10 metric-type 1

What is the effect of the 'default-information originate always' command?

Accepted Answer

A default route is unconditionally advertised into OSPF with metric 10 and type E1.. This command injects a default route (0.0.0.0/0) into the OSPF domain unconditionally, even if the router does not have a default route in its routing table. The metric and type are set as specified.

Answer

A default route is advertised into OSPF only if the router has a default route in its routing table.

Answer

The router will redistribute static default routes into OSPF.

Answer

The router will generate a default route only for area 1.

Question 7

Consider the following BGP configuration on a Cisco IOS-XE router:

router bgp 65001
 neighbor 10.0.0.2 remote-as 65002
 neighbor 10.0.0.2 route-map SET_COMMUNITY out
!
route-map SET_COMMUNITY permit 10
 set community 65001:100

What is the effect of this configuration?

Accepted Answer

The router will set the community to 65001:100 on all routes advertised to neighbor 10.0.0.2.. The route-map is applied to outbound updates to neighbor 10.0.0.2. It sets the BGP community value to 65001:100 on all routes advertised to that neighbor. The community is a well-known transitive attribute that can be used for routing policy.

Answer

The router will set the community to 65001:100 on all routes received from neighbor 10.0.0.2.

Answer

The router will filter routes with community 65001:100 from being advertised.

Answer

The router will remove the community from routes advertised to the neighbor.

Question 8

Examine the following HSRP configuration on a Cisco IOS-XE switch:

interface Vlan10
 ip address 10.0.0.2 255.255.255.0
 standby 10 ip 10.0.0.1
 standby 10 priority 150
 standby 10 preempt

What is the effect of the 'standby 10 preempt' command?

Accepted Answer

The router will immediately become the active router if it has a higher priority than the current active.. The preempt command allows this router to become the active HSRP router if it has a higher priority than the current active router. Without preempt, the router with higher priority would not take over unless the current active fails.

Answer

The router will become active only if the current active fails.

Answer

The router will send a gratuitous ARP to update the virtual MAC address.

Answer

The router will lower its priority to avoid becoming active.

Question 9

Consider the following partial configuration for QoS on a Cisco IOS-XE router:

class-map match-all VOICE
 match ip dscp ef
!
policy-map QOS_POLICY
 class VOICE
  priority 1000
 class class-default
  fair-queue
!
interface GigabitEthernet0/0
 service-policy output QOS_POLICY

What is the effect of the 'priority 1000' command under class VOICE?

Accepted Answer

Voice traffic is placed in a strict priority queue with a bandwidth limit of 1000 kbps.. The 'priority' command in a policy-map provides strict priority queuing (low-latency queue) for the matching traffic, with a bandwidth guarantee of 1000 kbps. This ensures that voice traffic (marked with DSCP EF) is serviced before other traffic, up to the specified rate.

Answer

Voice traffic is given a minimum bandwidth guarantee of 1000 kbps but no priority.

Answer

Voice traffic is dropped if it exceeds 1000 kbps.

Answer

Voice traffic is shaped to 1000 kbps.

Question 10

What is the default OSPF hello interval on an Ethernet link?

Accepted Answer

10 seconds. OSPF uses different hello intervals depending on the network type. On broadcast and point-to-point networks (like Ethernet), the default hello interval is 10 seconds.

Answer

30 seconds

Answer

40 seconds

Answer

5 seconds

Question 11

Which BGP attribute is preferred when it has the lowest value?

Accepted Answer

MED. BGP uses multiple attributes to determine the best path. The WEIGHT attribute is Cisco-specific and is preferred when it has the highest value, not lowest. The LOCAL_PREF attribute is preferred with the highest value. The MED (Multi-Exit Discriminator) attribute is preferred with the lowest value. The ORIGIN attribute prefers IGP over EGP and incomplete.

Answer

WEIGHT

Answer

LOCAL_PREF

Answer

ORIGIN

Question 12

What is the maximum hop count for EIGRP?

Accepted Answer

100. EIGRP uses a metric based on bandwidth and delay, but it also has a hop count limit. The default maximum hop count is 100, but it can be configured up to 255.

Answer

15

Answer

255

Answer

Unlimited

Question 13

Drag and drop the steps of Cisco DNA Center device onboarding via PnP into the correct order, from first to last.

Accepted Answer

Device boots and obtains IP via DHCP with PnP options. The PnP onboarding process begins with the device obtaining an IP address via DHCP and receiving the PnP server address from DHCP options. The device then discovers the Cisco DNA Center PnP server and authenticates using a certificate or credentials. After authentication, the device downloads its Day 0 configuration and image from DNA Center. Finally, the device applies the configuration and joins the fabric or network.

Question 14

Drag and drop the steps of Cisco DNA Center software image update (SWIM) process into the correct order, from first to last.

Accepted Answer

Import new image into DNA Center repository. The SWIM process starts with the administrator importing the new image into the Cisco DNA Center image repository. Next, the image is distributed to the target devices. A pre-check verifies device compatibility and available storage. Then the device is rebooted with the new image. Finally, a post-check confirms the device is running the desired image and operational.

Question 15

Drag and drop the steps of Cisco DNA Center assurance data collection workflow into the correct order, from first to last.

Accepted Answer

Devices stream telemetry to DNA Center. Assurance begins with network devices streaming telemetry data (e.g., NetFlow, SNMP, syslog) to DNA Center. DNA Center processes and correlates the data to build a baseline of normal behavior. It then applies machine learning models to detect anomalies. Alerts and insights are generated for potential issues. Finally, the dashboard displays health scores and recommended actions for the administrator.