[Oct 08, 2024] Free JNCIS-DC JN0-480 Official Cert Guide PDF Download [Q20-Q40]

08Oct 2024 by admin No Comments

4.8/5 - (5 votes)

[Oct 08, 2024] Free JNCIS-DC JN0-480 Official Cert Guide PDF Download

Juniper JN0-480 Official Cert Guide PDF

Q20. Which fabric type should be chosen in a template to create a five-stage Clos?

collapsed

circuit switched

rack-based

pod-based

Q21. Which attribute enables Juniper Apstra to scale and manage thousands of devices with a single server instance?

Apstra is installed as a cloud resource.

Apstra is based on NGINX.

Apstra is available as an OVA.

Apstra is a distributed state system.

The attribute that enables Juniper Apstra to scale and manage thousands of devices with a single server instance is that Apstra is a distributed state system. This means that Apstra uses a graph database to store the network topology and configuration data in a distributed and replicated manner across multiple server nodes.
This allows Apstra to handle large-scale networks with high performance, reliability, and availability. Apstra also uses a stateful orchestration engine that ensures the network state is always consistent with the intent of the blueprint, which is the logical representation of thenetwork design and behavior. Apstra can automatically detect and resolve any discrepancies between the desired and actual network state, as well as handle any changes or failures in the network. The other options are incorrect because:
* A. Apstra is installed as a cloud resource is wrong because Apstra can be installed either as a cloud resource or as an on-premises resource. Apstra is available as a virtual machine image that can be deployed on various hypervisors, such as VMware ESXi, QEMU/KVM, Microsoft Hyper-V, or Oracle VirtualBox. Apstra can also be deployed on public cloud platforms, such as Amazon Web Services (AWS) or Microsoft Azure. However, the installation method does not affect the scalability of Apstra, which is determined by the distributed state system architecture.
* B. Apstra is based on NGINX is wrong because Apstra is not based on NGINX, but on Python and Django. NGINX is a web server and reverse proxy that Apstra uses to serve the web user interface and the REST API. However, NGINX is not the core component of Apstra, and it does not affect the scalability of Apstra, which is determined by the distributed state system architecture.
* C. Apstra is available as an OVA is wrong because Apstra is available as an OVF, not an OVA. An
* OVF (Open Virtualization Format) is a standard format for packaging and distributing virtual machine images. An OVA (Open Virtual Appliance) is a single file that contains the OVF and the virtual disk images. Apstra provides an OVF file that can be imported into various hypervisors, such as VMware ESXi, QEMU/KVM, Microsoft Hyper-V, or Oracle VirtualBox. However, the availability of Apstra as an OVF does not affect the scalability of Apstra, which is determined by the distributed state system architecture. References:
* JUNIPER APSTRA ARCHITECTURE
* Apstra Server Requirements/References
* Juniper Networks Apstra 4.0 enhances the experience of users and operators

Q22. You are using Juniper Apstra to design a data center fabric.
In this scenario, which object type associates a specific vendor model to a logical device?

templates

device profiles

agent profiles

interface map

Q23. Which two statements are correct about probes? (Choose two.)

Default probes can be cloned, modified, and saved.

Only the variable parameters tor default probes can be edited and saved.

All default probes are enabled for all blueprints.

Default probes are enabled, based on the intent for a blueprint.

Probes are the basic unit of abstraction in Intent-Based Analytics (IBA). They are used to collect, process, and analyze data from the network and raise anomalies based on specified conditions. Probes are composed of processors and stages that form a directed acyclic graph (DAG) of data flow. The following statements are correct about probes:
* A. Default probes can be cloned, modified, and saved. This is true because Apstra provides a set of default probes that cover common use cases and scenarios. These probes can be cloned and modified to suit the specific needs of the user. The modified probes can be saved as new probes with different names and descriptions. This allows the user to customize and extend the functionality of the default probes.
* D. Default probes are enabled, based on the intent for a blueprint. This is true because Apstra enables or disables the default probes automatically based on the intent of the blueprint. The intent of the blueprint is the high-level description of the desired state and behavior of the network. Apstra uses the intent to determine which default probes are relevant and applicable for the blueprint and enables them accordingly. For example, if the intent of the blueprint is to deployan EVPN-VXLAN fabric, Apstra will enable the default probes related to EVPN-VXLAN, such as EVPN-VXLAN Anomaly Detection, EVPN-VXLAN Fabric Health, and EVPN-VXLAN Fabric Validation. The following statements are incorrect about probes:
* B. Only the variable parameters for default probes can be edited and saved. This is false because the user can edit and save any parameters for the default probes, not just the variable ones. The variable parameters are the ones that depend on the network topology, devices, or configuration, such as device
* names, interface names, IP addresses, VLAN IDs, etc. The user can also edit and save the fixed parameters, such as the duration, threshold, condition, etc. However, the user cannot edit and save the default probes directly. The user must clone the default probes first and then edit and save the cloned probes as new probes.
* C. All default probes are enabled for all blueprints. This is false because Apstra does not enable all default probes for all blueprints. Apstra enables the default probes based on the intent of the blueprint, as explained above. This means that only the default probes that are relevant and applicable for the blueprint are enabled. For example, if the intent of the blueprint is to deploy a BGP IP fabric, Apstra will not enable the default probes related to EVPN-VXLAN, since they are not relevant for the blueprint. The user can also manually enable or disable the default probes as needed. References:
* Probes
* Create Probe
* Intent-Based Analytics Overview

Q24. When working with logical devices, you specify where each port group is connected.
In thisscenario, which two Juniper Apstra Ul options are available to the operator? {Choose two.)

router

unused

generic

firewall

Q25. You are adding a new switch to Juniper Apstra software. The Managed Devices page shows the “0 OS-Quarantined” status. What is the proper next step to make the device ready for use in a blueprint?

Acknowledge the device.

Take the device out of maintenance mode.

Install the agent for the device.

Take the device out of drain state.

Q26. Exhibit.

Referring to the exhibit, what needs to change in the IP fabric to make it a valid IP fabric?

The IP fabric must consist of only one device model throughout the fabric.

The connection between the two spine nodes must be increased to 40 Gbps.

The IP fabric connections must be increased to a speed greater than 10 Gbps.

The connection between the two spine nodes must be removed.

Q27. In the Juniper Apstra Ul. which three resources are assigned under the Resources menu? (Choose three.)

VTEP pools

ASN pools

VNI pools

logical device pools

IP address pools

In the Juniper Apstra UI, the Resources menu allows you to create and manage global and local resources that are used for various elements of the network design and configuration. The Resources menu includes the following three types of resources that can be assigned to the network devices and virtual networks:
* ASN pools: These are pools of autonomous system numbers (ASNs) that are used for the underlay routing protocol (EBGP) between the leaf and spine devices. You can create ASN pools with either
2-byte or 4-byte ASNs, and assign them to the logical devices in the blueprint.
* VNI pools: These are pools of virtual network identifiers (VNIs) that are used for the overlay network (VXLAN) between the end hosts. You can create VNI pools with a range of VNIs, and assign them to the virtual networks in the blueprint.
* IP address pools: These are pools of IPv4 or IPv6 addresses that are used for various purposes in the network, such as the loopback addresses for the devices, the IP prefixes for the virtual networks, the host
* IP addresses for the end hosts, and the gateway IP addresses for the IRB interfaces. You can create IP address pools with a range of IP addresses, and assign them to the logical devices and virtual networks in the blueprint.
The following two types of resources are not assigned under the Resources menu:
* VTEP pools: These are not resources that can be created or assigned by the user. VTEPs are VXLAN tunnel endpoints that are automatically generated by the Apstra server based on the loopback IP addresses of the devices. VTEPs are used as the source and destination IP addresses for the VXLAN tunnels in the overlay network.
* Logical device pools: These are not resources that can be created or assigned by the user. Logical device pools are groups of logical devices that share the same role, interface map, and resource assignments in the blueprint. Logical device pools are used to simplify the network design and configuration by applying the same settings to multiple devices.
References:
* Resources Introduction
* ASN Pools (Resources)
* VNI Pools (Resources)
* IP Address Pools (Resources)

Q28. You have designed your fabric in Juniper Apstra prior to deploying the network devices.
Which Apstra element in the Staged tab would be used to assist the team that is installing and cabling the devices?

Connectivity Templates

Virtual Networks table

Managed Devices list

Links table

Q29. Which statement is correct about the Juniper Apstra Rendered configuration?

It is built at commit time and stored in a MySQL database.

It is stored in a NoSQL database and incrementally updated.

It is dynamically tendered at commit time.

It is rendered from the graph database and stored locally.

Q30. Using Juniper Apstra. which component is defined in a template?

the leaf-to-spine interconnection

the speed of the links between the spine devices and the leaf devices

the number of spine devices in a topology

the definition of IP pools

Q31. Exhibit.

Referring to the exhibit, how do you display the IPv6 subnets lot all of the listed VXLANs?

IPv6 subnets ate shown when each VXLAN is selected individually.

Select Columns, then select IPv6 Subnet.

Select all VXLANs. and the IPv6 Subnets column will appear

An IPv6 Subnets column is not shown, indicating that no VXLAN has an assigned IPv6 subnet

Q32. Using the Juniper Apstra multitenancy capabilities, which approach will allow a tenant to interconnect two different routing zones?

Interconnection is the default behavior.

Use interconnection through the fabric spine nodes.

Interconnection cannot be enabled.

Use interconnection through an external gateway.

Q33. You have recently committed a change after creating a new blueprint in Juniper Apstra. In the main dashboard, you see a number of anomalies related to BGR What is a likely cause of these anomalies?

You have misconfigured ASNs.

The fabric has not converged yet.

Spine-leaf links are incorrectly set.

A generic system has not been configured.

In Juniper Apstra, a blueprint is a logical representation of the network design and configuration. When you create a new blueprint, you need to commit the changes to apply them to the network devices. However, committing the changes does not mean that the network is immediately updated and operational. It may take some time for the network to converge and reflect the new state of the blueprint. During this time, you may see some anomalies related to BGP in the main dashboard, which indicate that the BGP sessions are not established or stable between the devices. These anomalies are usually temporary and will disappear once the network converges and the BGP sessions are up and running. Therefore, the statement B is the most likely cause of these anomalies in this scenario.
The following three statements are less likely causes of these anomalies in this scenario:
* You have misconfigured ASNs. This is possible, but not very likely, because Juniper Apstra provides ASN pools that can be automatically assigned to the devices based on their roles. You can also manually specify the ASNs for the devices, but you need to ensure that they are unique and consistent with the network design. If you have misconfigured ASNs, you may see some anomalies related to BGP, but they will not disappear after the network converges. You will need to fix the ASNs and commit the changes again to resolve the anomalies.
* Spine-leaf links are incorrectly set. This is possible, but not very likely, because Juniper Apstra provides connectivity templates that can be used to define the spine-leaf links based on the interface maps. You can also manually specify the spine-leaf links, but you need to ensure that they are correct and match the physical cabling. If you have incorrectly set the spine-leaf links, you may see some anomalies related to BGP, but they will not disappear after the network converges. You will need to fix the spine-leaf links and commit the changes again to resolve the anomalies.
* A generic system has not been configured. This is not relevant, because a generic system is a device that is not managed by Juniper Apstra, but is connected to the network. A generic system does not affect the BGP sessions between the devices that are managed by Juniper Apstra. If you have a generic system in your network, you need to configure it manually and ensure that it is compatible with the network design. A generic system does not cause any anomalies related to BGP in the main dashboard.
References:
* Blueprint Summaries and Dashboard
* BGP Session Flapping Probe
* Probe: BGP Session Monitoring

Q34. Exhibit.

Which two statements ate correct about the information shown in the exhibit? (Choose two.)

The system is fully managed by Juniper Apstra.

The device shown is a generic system.

Four physical interfaces exist in a LAG facing the leaf pair.

The physical ports are not part of the LAG.

Q35. Exhibit.

In the EVPN-VXLAN data center fabric bridged overlay architecture shown in the exhibit, the servers are connected to Lead and Leat6 using the same virtual network identifier (VNI).
Which two statements are correct in this scenario? (Choose two.)

The underlay must use IRB interfaces.

The underlay must be provisioned with PIMv2.

Loopback IPv4 addresses must be advertised into the EBGP underlay from leaf and spine devices.

The underlay EBGPpeering’smust be established between leaf and spine devices.

In the EVPN-VXLAN data center fabric bridged overlay architecture shown in the exhibit, the servers are connected to Leaf1 and Leaf6 using the same virtual network identifier (VNI). This means that the servers belong to the same Layer 2 domain and can communicate with each other using VXLAN tunnels across the fabric. The underlay network provides the IP connectivity between the leaf and spine devices, and it uses EBGP as the routing protocol. Therefore, the following two statements are correct in this scenario:
* Loopback IPv4 addresses must be advertised into the EBGP underlay from leaf and spine devices. This is because the loopback addresses are used as the source and destination IP addresses for the VXLAN tunnels, and they must be reachable by all the devices in the fabric. The loopback addresses are also used as the router IDs and the BGP peer addresses for the EBGP sessions.
* The underlay EBGP peering’s must be established between leaf and spine devices. This is because the EBGP sessions are used to exchange the underlay routing information and the EVPN routes for the overlay network. The EBGPsessions are established using the loopback addresses of the devices, and they follow a spine-and-leaf topology, where each leaf device peers with all the spine devices, and each spine device peers with all the leaf devices.
The following two statements are incorrect in this scenario:
* The underlay must use IRB interfaces. This is not true, because the underlay network does not provide any Layer 3 gateway functionality for the overlay network. The IRB interfaces are used to provide inter-VXLAN routing within the fabric, which is not the case in the bridged overlay architecture. The IRB interfaces are used in the edge-routed bridging (ERB) or the centrally-routed bridging (CRB) architectures, which are different from the bridged overlay architecture.
* The underlay must be provisioned with PIMv2. This is not true, because the underlay network does not use multicast for the VXLAN tunnels. The VXLAN tunnels are established using EVPN, which uses BGP to distribute the MAC and IP addresses of the end hosts and the VTEP information of the devices.
EVPN eliminates the need for multicast in the underlay network, and it provides optimal forwarding and fast convergence for the overlay network.
References:
* Exploring EVPN-VXLAN Overlay Architectures – Bridged Overlay
* EVPN LAGs in EVPN-VXLAN Reference Architectures
* EVPN-VXLAN Configuration Guide

Q36. Which statement about Juniper Apstra role-based access control is correct?

The viewer role is predefined and can be deleted.

The administrator role can see all permissions.

The user role can create roles.

The administrator role is the only predefined role.

Q37. Exhibit.

You connect two single-homed servers using Juniper Apstra as shown in the exhibit. You are using the ERB design blueprint with two virtual networks in a common routing zone.
In this scenario, which two types of VXLAN tunnels will be automatically created by the EVPN control plane? (Choose two.)

EVPN signaled route Type-8 VXLAN tunnels

EVPN signaled route Type-3 VXLAN tunnels

EVPN signaled route Type-6 VXLAN tunnels

EVPN signaled route Type-2 VXLAN tunnels

Q38. Exhibit.

Referring to the exhibit, which statement is correct?

The gray-solid primitives indicate further configuration is requited.

The gray-solid primitives indicate that they ate incompatible with the connectivity template design.

The red-striped primitives indicate that they are incompatible with the connectivity template design.

The red-striped primitives indicate that further configuration is required.

Q39. You are working with a three-stage IP fabric using EBGP for peering.
In this scenario, which two actions are required to implement ECMP? (Choose two.)

Usea load balancing policy applied to the forwarding table as an export policy.

Use a load balancing policy applied to BGP as an export policy.

Use the multipath multiple-as BGP parameter.

Use a load balancing policy applied lo BGP as an import policy.

To implement ECMP in IP fabric using EBGP, you need to enable BGP to install multiple equal-cost paths in the routing table and to advertise them to the peers. The following actions are required to achieve this:
* B. Use a load balancing policy applied to BGP as an export policy. This is true because you need to apply a load balancing policy to BGP as an export policy to allow BGP to advertise multiple paths to the same destination to the peers. By default, BGP only advertises the best path to the peers, which prevents ECMP. A load balancing policy can be configured to match the desired routes and set the multipath attribute to true. This will enable BGP to advertise up to the maximum number of paths configured by the maximum-paths command. For example, the following configuration applies a load balancing policy to BGP as an export policy for the neighbor 10.10.10.1:
policy-statement load-balance { term 1 { from { route-filter 192.168.0.0/16 exact; } then { multipath; accept; }
} } protocols { bgp { group ebgp { type external; neighbor 10.10.10.1 { export load-balance; } } } }
* C. Use the multipath multiple-as BGP parameter. This is true because you need to enable the multipath multiple-as BGP parameter to allow BGP to install multiple paths from different autonomous systems in the routing table. By default, BGP only installs multiple paths from the same autonomous system, which limits ECMP. The multipath multiple-as parameter can be configured under the BGP group or neighbor level. This will enable BGP to install up to the maximum number of paths configured by the maximum-paths command. For example, the following configuration enables the multipath multiple-as parameter for the BGP group ebgp:
protocols { bgp { group ebgp { type external; multipath multiple-as; } } } The following options are incorrect because:
* A. Use a load balancing policy applied to the forwarding table as an export policy is wrong because applying a load balancing policy to the forwarding table does not affect the BGP advertisement or installation of multiple paths. A load balancing policy applied to the forwarding table only affects how the traffic isdistributed among the multiple paths in the forwarding table. It does not enable ECMP in BGP.
* D. Use a load balancing policy applied to BGP as an import policy is wrong because applying a load balancing policy to BGP as an import policy does not affect the BGP advertisement of multiple paths. A load balancing policy applied to BGP as an import policy only affects how the BGP routes are accepted or rejected from the peers. It does not enable ECMP in BGP. References:
* IP Fabric Underlay Network Design and Implementation
* Use ECMP to distribute traffic between two paths, one learned by eBGP and one learned by iBGP on a
* Cisco NX-OS switch
* Example: Configure an EVPN-VXLAN Centrally-Routed Bridging Fabric Using EBGP

Q40. Exhibit.

Referring to the exhibit, how many broadcast domains will an Ethernet frame pass through when traversing the IP fabric from Server A to Server B?

Referring to the exhibit, the image shows a simplified diagram of an IP fabric network connecting two servers, labeled as Server A and Server B. The IP fabric is a network architecture that uses a Clos topology to provide high bandwidth, low latency, and scalability for data center networks. The IP fabric consists of spine and leaf devices that use BGP as the routing protocol and VXLAN as the overlay technology1.
A broadcast domain is a logical portion of a network where any device can directly transmit broadcast frames to other devices at the data link layer (OSI Layer 2). A broadcast frame is a frame that has a destination MAC address of all ones (FF:FF:FF:FF:FF:FF), which means that it is intended for all devices in the same broadcast domain. A broadcast domain is usually bounded by a router, which does not forward broadcast frames to other networks2.
In the exhibit, there are two broadcast domains that an Ethernet frame will pass through when traversing the IP fabric from Server A to Server B. The first broadcast domain is the one that contains Server A and the leaf device that it is connected to. The second broadcast domain is the one that contains Server B and the leaf device that it is connected to. The IP fabric itself is not a broadcast domain, because it uses IP routing and VXLAN encapsulation to transport the Ethernet frames over the Layer 3 network. Therefore, the statement C is correct in this scenario.
The following three statements are incorrect in this scenario:
* A. 1. This is not true, because there are not one, but two broadcast domains that an Ethernet frame will pass through when traversing the IP fabric from Server A to Server B. The IP fabric itself is not a broadcast domain, because it uses IP routing and VXLAN encapsulation to transport the Ethernet frames over the Layer 3 network.
* B. 4. This is not true, because there are not four, but two broadcast domains that an Ethernet frame will pass through when traversing the IP fabric from Server A to Server B. The spine devices and the leaf devices that are not connected to the servers are not part of the broadcast domains, because they use IP routing and VXLAN encapsulation to transport the Ethernet frames over the Layer 3 network.
* D. 3. This is not true, because there are not three, but two broadcast domains that an Ethernet frame will pass through when traversing the IP fabric from Server A to Server B. The IP fabric itself is not a broadcast domain, because it uses IP routing and VXLAN encapsulation to transport the Ethernet frames over the Layer 3 network.
References:
* IP Fabric Overview
* Broadcast Domain – NetworkLessons.com

Juniper JN0-480 certification exam is designed to test the knowledge and skills of IT professionals in the field of data center networking. Data Center, Specialist (JNCIS-DC) certification is tailored for individuals who are seeking to verify their expertise in configuring and managing data center devices, protocols, and technologies. The JN0-480 exam is an industry-recognized certification that proves the holder is competent in designing, implementing, and troubleshooting data center networks, and is a valuable asset for IT professionals who wish to advance their careers in this field.

Juniper JN0-480 exam is a certification test designed for IT professionals seeking to acquire skills in data center networking. JN0-480 exam is known as the Data Center, Specialist (JNCIS-DC) exam and enables candidates to demonstrate their knowledge and proficiency in data center technologies. JN0-480 exam is intended for individuals who have experience working with Juniper Networks technologies and wish to enhance their skills in data center networking.

Free JN0-480 Exam Dumps to Improve Exam Score: https://www.practicematerial.com/JN0-480-exam-materials.html

Leave a Reply Cancel reply