Practice Free JN0-750 Exam Online Questions
A Network Architect is choosing a tool to automate the configuration of a large number of Juniper EX switches managed by Mist. The primary requirement is that the tool should be agentless and use a human-readable data format for defining the configuration tasks. The operations team is already familiar with this tool for managing servers.
Which automation tool fits these requirements?
- A . Chef
- B . Ansible
- C . Puppet
- D . SaltStack
SCENARIO START
Scenario Title: Troubleshooting Wired Client Performance with Mist Wired Assurance
Scenario Description:
A Wired Engineer is investigating a trouble ticket from a user in the finance department. The user reports that their VoIP calls are frequently choppy and that accessing files from the local server is slow. The user is connected via an Ethernet port to a Juniper EX4300 switch, which is managed by the Mist cloud. The engineer’s goal is to use the tools within Mist Wired Assurance to diagnose and identify the root cause of the poor performance without needing to physically go to the switch or the user’s desk.
Technical Context:
– User Device: A corporate laptop connected via Ethernet.
– Switch: Juniper EX4300-48P, port `ge-0/0/5`.
– Network: The user is in the "Finance" VLAN (VLAN 100). The VoIP phones are in the "Voice" VLAN (VLAN 110).
– Mist Configuration: The switch is onboarded to the "Corporate-HQ" site and is providing Wired Assurance telemetry. Service Level Expectations (SLEs) are enabled for Throughput, Switch Health, and Connection.
– Initial Findings: The Wired Assurance dashboard for the "Corporate-HQ" site shows a red (poor) SLE for "Connection" over the past day.
Supporting Data:
When drilling down into the "Connection" SLE, the engineer sees the following failure details under "Sub-classifiers":
– Top Failing Sub-classifier: `Switch Health – Port-Stp-Config`
– Affected Switch: `HQ-Finance-SW-01` (EX4300)
– Affected Ports: `ge-0/0/5`, `ge-0/0/6`, `ge-0/0/7`
– Marvis Action Recommendation: "Spanning Tree Protocol (STP) Misconfiguration Detected. Root bridge is flapping on the affected switch ports."
SCENARIO END
Referring to the scenario, which Juniper Mist component is providing the initial, high-level indication that there is a problem with the wired network experience?
- A . The Wired Assurance Service Level Expectations (SLEs)
- B . The Audit Logs
- C . The Access Assurance policy
- D . The Switch Template configuration
SCENARIO START
Scenario Title: Troubleshooting Wired Client Performance with Mist Wired Assurance
Scenario Description:
A Wired Engineer is investigating a trouble ticket from a user in the finance department. The user reports that their VoIP calls are frequently choppy and that accessing files from the local server is slow. The user is connected via an Ethernet port to a Juniper EX4300 switch, which is managed by the Mist cloud. The engineer’s goal is to use the tools within Mist Wired Assurance to diagnose and identify the root cause of the poor performance without needing to physically go to the switch or the user’s desk.
Technical Context:
– User Device: A corporate laptop connected via Ethernet.
– Switch: Juniper EX4300-48P, port `ge-0/0/5`.
– Network: The user is in the "Finance" VLAN (VLAN 100). The VoIP phones are in the "Voice" VLAN (VLAN 110).
– Mist Configuration: The switch is onboarded to the "Corporate-HQ" site and is providing Wired Assurance telemetry. Service Level Expectations (SLEs) are enabled for Throughput, Switch Health, and Connection.
– Initial Findings: The Wired Assurance dashboard for the "Corporate-HQ" site shows a red (poor) SLE for "Connection" over the past day.
Supporting Data:
When drilling down into the "Connection" SLE, the engineer sees the following failure details under "Sub-classifiers":
– Top Failing Sub-classifier: `Switch Health – Port-Stp-Config`
– Affected Switch: `HQ-Finance-SW-01` (EX4300)
– Affected Ports: `ge-0/0/5`, `ge-0/0/6`, `ge-0/0/7`
– Marvis Action Recommendation: "Spanning Tree Protocol (STP) Misconfiguration Detected. Root bridge is flapping on the affected switch ports."
SCENARIO END
Referring to the scenario, which Juniper Mist component is providing the initial, high-level indication that there is a problem with the wired network experience?
- A . The Wired Assurance Service Level Expectations (SLEs)
- B . The Audit Logs
- C . The Access Assurance policy
- D . The Switch Template configuration
Based on the supporting data from Marvis and the SLE sub-classifiers, what is the most likely root cause of the user’s choppy VoIP calls and slow file access?
- A . The uplink from the switch to the core is saturated.
- B . The user’s laptop has a faulty network cable.
- C . The DHCP server for the "Finance" VLAN is not responding.
- D . A Spanning Tree Protocol (STP) loop or instability is causing intermittent packet loss and high latency on the user’s switch port.
An Automation Developer is automating the process of adding a new Juniper EX switch to a site. The script has already claimed the switch into the organization’s inventory.
What is the next mandatory API call to ensure the switch can be configured for a specific site?
- A . A `PUT` request to `/api/v1/orgs/{org_id}/inventory` to assign the switch to a `site_id`.
- B . A `PUT` request to `/api/v1/sites/{site_id}/devices/{device_id}` to set its name.
- C . A `POST` request to `/api/v1/sites/{site_id}/devices` to create the device record at the site.
- D . A `GET` request to `/api/v1/sites/{site_id}/deviceprofiles` to choose a profile for the switch.
An Automation Developer is automating the process of adding a new Juniper EX switch to a site. The script has already claimed the switch into the organization’s inventory.
What is the next mandatory API call to ensure the switch can be configured for a specific site?
- A . A `PUT` request to `/api/v1/orgs/{org_id}/inventory` to assign the switch to a `site_id`.
- B . A `PUT` request to `/api/v1/sites/{site_id}/devices/{device_id}` to set its name.
- C . A `POST` request to `/api/v1/sites/{site_id}/devices` to create the device record at the site.
- D . A `GET` request to `/api/v1/sites/{site_id}/deviceprofiles` to choose a profile for the switch.
The routing must be intelligent, denying any traffic that does not match a defined service.
Supporting Data:
A snippet of the SSR service policy configuration applied to the clinic routers:
config
authority
service-policy EHR_Access
rule
source-tenant Clinic_Group
destination-service EHR-App
access-policy allow
exit
default-policy deny
exit
exit
end
SCENARIO END
Referring to the scenario, which core principle of the Session Smart Router architecture directly addresses the requirement to deny traffic that does not match a defined service?
- A . The use of IPsec tunnels for encrypting traffic.
- B . The "deny-by-default" security posture of its service-oriented policies.
- C . Dynamic load balancing based on session quality.
- D . Local internet breakout
The client decides they want a less severe initial response for threats with a lower score. The requirement is changed: if the `threat_score` in the Webhook payload is between 5 and 7, the SOAR platform should only send an email to the security team instead of quarantining the device.
Where is the logic implemented to handle this conditional action (quarantine vs. email)?
- A . In the Juniper Mist Alert Template configuration.
- B . In the client device’s firewall settings.
- C . In the SOAR platform’s playbook or automation script.
- D . In the Juniper Mist Webhook configuration.
A Network Architect is building a Day 2 automation script to pull daily application usage statistics for a specific site. They need the total bytes transferred for each application.
Which Mist API endpoint should the script query to get this specific insight?
- A . `GET /api/v1/sites/{site_id}/stats/devices`
- B . `GET /api/v1/sites/{site_id}/clients`
- C . `GET /api/v1/orgs/{org_id}/audits`
- D . `GET /api/v1/sites/{site_id}/insights/apps`
A Network Administrator receives a JSON payload from a Mist Webhook. They load it into a Python variable named `data`.
{
"topic": "device-down",
"events": [
{
"mac": "5c5b35000001",
"type": "AP_DISCONNECTED"
},
{
"mac": "5c5b35000002",
"type": "AP_DISCONNECTED"
}
]
}
Which of the following statements about the resulting Python data structure are true? (Select all that apply.)
- A . The top-level `data` variable is a Python dictionary.
- B . To access the MAC address of the first event, you would use `data["events"][0]["mac"]`.
- C . The value of `data["events"]` is a Python list.
- D . The value of `data["topic"]` is the string `"device-down"`.
- E . The entire `data` variable is a Python list.