JN0-610 Sample Questions & Answers
Free JNCIP-Cloud practice questions with worked answers and explanations. See how the ExamJungle simulator prepares you — then jump into the full test.
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- Question 1BeginnerSelect 2
Contrail Architecture · Protocols
Which TWO protocols are primarily used for communication between the Contrail Control Nodes and the vRouters on compute nodes? (Select TWO)
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Correct answers: D, E
XMPP is used for the control plane exchange of routing information and configuration data between the Control Node and the vRouter Agent. Sandesh is used for sending analytics data (logs, stats, flows) from the vRouter to the Analytics Collector.
Sandesh is the proprietary protocol used for analytics and telemetry streams from vRouter to the Analytics nodes.
- Question 2Beginner
Contrail Architecture · vRouter Types
True or False: In a Contrail environment using DPDK vRouter, the vRouter forwarding plane runs in the Linux kernel space to maximize performance.
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Correct answer: B
This is False. The DPDK (Data Plane Development Kit) vRouter runs in user space, bypassing the Linux kernel networking stack to achieve higher throughput and lower latency. The Kernel vRouter (default/legacy) runs in kernel space.
- Question 3Intermediate
Troubleshooting · Control Plane
An administrator observes that the 'contrail-status' command on a Control Node shows the 'contrail-control' service as 'Active' but with '0 XMPP peers'. The compute nodes are powered on and reachable via ping. What is the most likely cause of this issue?
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Correct answer: B
The vRouter agent initiates the XMPP connection to the Control Node. If the Control Node shows 0 peers, it means no agents have successfully connected. This is commonly caused by misconfiguration in the
contrail-vrouter-agent.conffile where the Control Node list is incorrect, or a firewall is blocking port 5269 (XMPP). - Question 4Advanced
Contrail Fabric Management · Device Onboarding
You are deploying a Contrail fabric using ZTP (Zero Touch Provisioning). Which protocol is primarily used by the fabric management system to push initial configurations to the spine and leaf switches after they obtain an IP address via DHCP?
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Correct answer: B
In Contrail Command (Fabric Management), after the device gets an IP via DHCP, the system typically uses Netconf over SSH (or sometimes Ansible which uses SSH) to push the full configuration. Netconf is the standard protocol for programmatic configuration of Juniper devices in this context.
- Question 5Intermediate
Contrail Security · Security Groups vs Tags
A customer wants to implement 'Micro-segmentation' for their application running on OpenStack with Contrail. They need to restrict traffic between VM instances based on the application tier (Web, App, DB) regardless of the Virtual Network or IP address assigned. Which Contrail construct is BEST suited for this requirement?
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Correct answer: D
Contrail's implementation of micro-segmentation relies heavily on Tags (e.g., Tier=Web, Deployment=Prod) and Application Policy Sets (APS). This allows policies to be defined based on business intent (Tags) rather than network topology (IPs/VNs), decoupling security from networking.
- Question 6Beginner
Contrail Architecture · Config Node
Which Contrail component is responsible for translating the high-level data model (Virtual Networks, Policies) into low-level configuration and pushing it to the Control Nodes?
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Correct answer: C
The Schema Transformer is a key sub-component of the Config Node. It listens to changes in the high-level configuration (Intent) and transforms them into low-level system configuration objects (like Routing Instances and Route Targets) that the Control Nodes can consume.
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