Oct-2024 JN0-480 Study Material, Preparation Guide and PDF Download
Free JN0-480 Certification Sample Questions with Online Practice Test
NEW QUESTION # 23
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.)
- A. Loopback IPv4 addresses must be advertised into the EBGP underlay from leaf and spine devices.
- B. The underlay EBGPpeering'smust be established between leaf and spine devices.
- C. The underlay must be provisioned with PIMv2.
- D. The underlay must use IRB interfaces.
Answer: A,B
Explanation:
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
NEW QUESTION # 24
Exhibit.
Which two statements ate correct about the information shown in the exhibit? (Choose two.)
- A. The physical ports are not part of the LAG.
- B. The device shown is a generic system.
- C. The system is fully managed by Juniper Apstra.
- D. Four physical interfaces exist in a LAG facing the leaf pair.
Answer: B,D
Explanation:
According to the Juniper documentation1, a generic system is a device that is not managed by Juniper Apstra and does not have a specific role or type assigned to it. A generic system can be used to represent a server, a firewall, a load balancer, or any other device that is not part of the fabric. In the exhibit, the device shown is a generic system, as indicated by its role, system type, and management level. Therefore, the correct answer is B: The device shown is a generic system.
According to the Juniper documentation2, a LAG is a link aggregation group that bundles multiple physical interfaces into a single logical interface. A LAG can provide increased bandwidth, redundancy, and load balancing for the network traffic. In the exhibit, the device shown has four physical interfaces that are part of a LAG, as indicated by their description and li_type. The LAG is facing the leaf pair, which are the two switches that connect to the device. Therefore, the correct answer is C. Four physical interfaces exist in a LAG facing the leaf pair. References: Generic Systems (Datacenter Design), Form LAG | Apstra 4.1 | Juniper Networks
NEW QUESTION # 25
What are two system-defined user roles that are available in Juniper Apstra? (Choose two.)
- A. user
- B. viewer
- C. root
- D. authorized
Answer: A,B
Explanation:
Juniper Apstra provides four system-defined user roles that are available in the Apstra GUI environment. They are: administrator, device_ztp, viewer, and user1. Based on the web search results, we can infer the following statements:
* viewer: This role includes permissions to only view various elements in the Apstra system, such as blueprints, devices, design, resources, external systems, platform, and others. Users with this role cannot create, edit, or delete any element12.
* user: This role includes permissions to view and edit various elements in the Apstra system, such as blueprints, devices, design, resources, external systems, platform, and others. Users with this role cannot create or delete any element12.
* authorized: This is not a system-defined user role in Juniper Apstra. It is a term used to describe users who have been authenticated by an external system, such as LDAP, Active Directory, TACACS+, or RADIUS3.
* root: This is not a system-defined user role in Juniper Apstra. It is a term used to describe the superuser account on a Linux system, which has full access to all commands and files. Creating a user in the Apstra GUI does not provide that user access to the Apstra platform via SSH. To access the Apstra platform via SSH, you must create a local Linux system user4. References:
* User / Role Management Introduction
* User/Role Management (Platform)
* AAA Providers
* User Profile Management
NEW QUESTION # 26
Which statement is correct about making changes to a predefined device profile in Juniper Apstra?
- A. The changes you make to a predefined device profile will be discarded and overwritten when upgrading the Apstra server version.
- B. Changing the predefined device profile will also affect deployed devices that use the same profile.
- C. You must reboot the Apstra server after changes are made to a predefined device profile before they will become active.
- D. The processor load on the Apstra server will be negatively impacted when changes are made to a predefined device profile.
Answer: A
Explanation:
According to the Juniper documentation1, a predefined device profile is a configuration template that is shipped with Apstra software and supports most qualified Juniper devices. A predefined device profile cannot be changed, since any changes would be discarded and overwritten when you upgrade the Apstra server version. If you want to customize a predefined device profile, you can clone and edit it instead. Therefore, the correct answer is A. The changes you make to a predefined device profile will be discarded and overwritten when upgrading the Apstra server version. References: Edit Device Profile | Apstra 4.2 | Juniper Networks
NEW QUESTION # 27
You want to add a configuration that is not supported by Juniper Apstra reference architecture using a configlet.
Which two configurations would be applicable in this scenario? (Choose two.)
- A. syslog configuration
- B. policy configuration
- C. NTP configuration
- D. static route configuration
Answer: A,C
Explanation:
According to the Juniper documentation1, a configlet is a configuration template that augments Apstra's reference design with non-native device configuration. They consist of one or more generators. Each generator specifies a NOS type (config style), when to render the configuration, and CLI commands (and file name as applicable). Some applications for configlets include the following:
* Syslog
* SNMP access policy
* TACACS / RADIUS
* Management ACLs
* Control plane policing
* NTP
* Username / password
Therefore, the correct answer is C and D. syslog configuration and NTP configuration. These are examples of non-native device configuration that can be added using a configlet. Static route configuration and policy configuration are not applicable in this scenario, because they are part of the reference design configuration that should not be replaced or modified by a configlet. References: Configlets (Datacenter Design), Configlet Examples (Design)
NEW QUESTION # 28
In the Juniper Apstra Ul. which two resource types would be created in the Resources menu? (Choose two.)
- A. bridge domain identifier (BDI)
- B. DHCP pools
- C. IP pools
- D. ASN pools
Answer: C,D
Explanation:
According to the Juniper documentation1, the Resources menu in the Juniper Apstra UI allows you to create and manage various types of resources that are assigned to different elements of the network. Resources include the following types:
* IPv4 (including Host IPv4)
* IPv6 (including Host IPv6)
* ASN (autonomous system number)
* VNI (virtual network identifier)
* VLAN (virtual local area network)
* Integer (used for pool type VLAN in local pools in Freeform blueprints) Therefore, the correct answer is C and D. ASN pools and IP pools are two types of resources that can be created in the Resources menu. Bridge domain identifier (BDI) and DHCP pools are not applicable in this scenario, because they are not part of the resources types supported by Juniper Apstra. References: Resources Introduction | Apstra 4.1 | Juniper Networks
NEW QUESTION # 29
Exhibit.
The 10.100.0.0/16 route is being advertised into your BGP IP fabric. ECMP load balancing has been properly enabled on all devices In this scenario, how many routes will the leaf device in AS 65000 receive for the 10.100.0.0/16 prefix?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
The leaf device in AS 65000 will receive three routes for the 10.100.0.0/16 prefix, one from each spine device in AS 65001, AS 65002, and AS 65003. Since ECMP load balancing is enabled, the leaf device will install all three routes in its routing table and distribute the traffic among them. The other options are incorrect because:
* B. 1 is wrong because the leaf device will not receive only one route for the prefix. It will receive multiple routes from different spine devices and use ECMP to load balance among them.
* C. 2 is wrong because the leaf device will not receive only two routes for the prefix. It will receive three routes from three spine devices, as explained above.
* D. 4 is wrong because the leaf device will not receive four routes for the prefix. It will receive three routes from three spine devices, as explained above. The fourth spine device in AS 65004 is not directly connected to the leaf device and will not advertise the prefix to it. References:
* IP Fabric Underlay Network Design and Implementation
* BGP Multipath load sharing iBGP and eBGP
* ECMP Load Balancing
NEW QUESTION # 30
Which two statements are correct about repairing a Juniper Apstra cabling map before deploying your blueprint? (Choose two.)
- A. You must manually change the cabling map to update spine-to-leaf fabric links.
- B. You must manually change the cabling map to update leaf-to-generic links.
- C. Apstra can use LLDP data from the leaf devices to update the leaf-to-generic connections in the cabling map.
- D. Apstra can use LLDP data from the spine-to-lea! fabric devices to update the connections in the cabling map.
Answer: C,D
Explanation:
The cabling map is a graphical representation of the physical connections between the devices in the data center fabric. It shows the status of the cables, interfaces, and BGP sessions for each device. You can use the cabling map to verify and repair the cabling before deploying your blueprint. Based on the web search results, we can infer the following statements:
* Apstra can use LLDP data from the spine-to-leaf fabric devices to update the connections in the cabling map. This is true because Apstra can collect LLDP data from the devices using the Generic Graph Collector processor and use it to update the cabling map automatically. LLDP is a protocol that allows devices to exchange information about their identity, capabilities, and neighbors12.
* Apstra can use LLDP data from the leaf devices to update the leaf-to-generic connections in the cabling map. This is true because Apstra can also collect LLDP data from the leaf devices and use it to update the connections to the generic devices, such as routers, firewalls, or servers. Generic devices are devices that are not managed by Apstra but are part of the data center fabric23.
* You must manually change the cabling map to update spine-to-leaf fabric links. This is false because Apstra can use LLDP data to update the spine-to-leaf fabric links automatically, as explained above. However, you can also manually change the cabling map to override the Apstra-generated cabling, if needed24.
* You must manually change the cabling map to update leaf-to-generic links. This is false because Apstra can use LLDP data to update the leaf-to-generic links automatically, as explained above. However, you can also manually change the cabling map to override the Apstra-generated cabling, if needed24. References:
* LLDP Overview
* Edit Cabling Map (Datacenter)
* Generic Devices
* Import / Export Cabling Map (Datacenter)
NEW QUESTION # 31
Which two statements are correct regarding a pristine configuration in Juniper Apstra? (Choose two.)
- A. It Is the configuration file on a device before acknowledgment in Apstra.
- B. It is the device's previously active configuration.
- C. It is the device's currently active configuration.
- D. It is the configuration file placed on the device when decommissioning the device.
Answer: A,D
Explanation:
A pristine configuration in Juniper Apstra is the configuration file that is used to onboard a device into the Apstra software application. A pristine configuration contains the minimum settings that are required for the device to communicate with the Apstra server, such as the hostname, management IP address, username, password, and SSH key1. A pristine configuration has the following characteristics:
* It is the configuration file placed on the device when decommissioning the device. This is because when a device is decommissioned from the Apstra software application, it is reverted back to its pristine configuration, which removes all the network configuration and services that were applied by the Apstra software application. This allows the device to be reused or repurposed for another network2.
* It is the configuration file on a device before acknowledgment in Apstra. This is because when a device is onboarded into the Apstra software application, it is initially in the discovery state, which means that
* the device is discovered by the Apstra server, but not yet acknowledged by the user. In the discovery state, thedevice has the pristine configuration, which can be viewed and edited by the user. Once the user acknowledges the device, the device moves to the deployed state, which means that the device is ready to receive the network configuration and services from the Apstra software application3.
The following two statements are incorrect in this scenario:
* It is the device's currently active configuration. This is not true, because the pristine configuration is not the device's currently active configuration, unless the device is in the discovery state or the decommissioned state. In the deployed state, the device's currently active configuration is the network configuration and services that are applied by the Apstra software application, which are based on the blueprint and the intent3.
* It is the device's previously active configuration. This is not true, because the pristine configuration is not the device's previously active configuration, unless the device is in the decommissioned state. In the discovery state, the pristine configuration is the device's initial configuration, which may or may not be the same as the device's previous configuration before being onboarded into the Apstra software application. In the deployed state, the device's previously active configuration is the network configuration and services that were applied by the Apstra software application before the last commit3.
References:
* Pristine Config
* Decommission Device
* Device States
NEW QUESTION # 32
Which statement is correct about the Juniper Apstra Rendered configuration?
- A. It is stored in a NoSQL database and incrementally updated.
- B. It is dynamically tendered at commit time.
- C. It is rendered from the graph database and stored locally.
- D. It is built at commit time and stored in a MySQL database.
Answer: B
Explanation:
The Juniper Apstra Rendered configuration is the configuration that is generated from the staged blueprint and applied to the devices in the network. The Rendered configuration is dynamically rendered at commit time, which means that it is created on the fly based on the latest changes and validations in the blueprint. The Rendered configuration is not stored in any database, but it can be viewed in the Apstra UI or downloaded as a file. The Rendered configuration reflects the desired state of the network as defined by the intent of the blueprint. The other options are incorrect because:
* A. It is built at commit time and stored in a MySQL database is wrong because the Rendered configuration is not stored in any database, let alone a MySQLdatabase. Apstra uses a graph database to store the network topology and configuration data, not a relational database like MySQL.
* B. It is stored in a NoSQL database and incrementally updated is wrong because the Rendered configuration is not stored in any database, let alone a NoSQL database. Apstra uses a graph database to store the network topology and configuration data, not a non-relational database like NoSQL. The Rendered configuration is not incrementally updated, but dynamically rendered at commit time.
* D. It is rendered from the graph database and stored locally is wrong because the Rendered configuration is not rendered from the graph database, but from the staged blueprint. The graph database stores the network topology and configuration data, but the Rendered configuration is generated from the blueprint, which is a logical representation of the network design and intent. The Rendered configuration is not stored locally, but it can be downloaded as a file if needed. References:
* Config Rendering in Juniper Apstra
* AOS Device Configuration Lifecycle
* Configlets (Datacenter Design)
NEW QUESTION # 33
Which fabric type should be chosen in a template to create a five-stage Clos?
- A. rack-based
- B. collapsed
- C. circuit switched
- D. pod-based
Answer: D
NEW QUESTION # 34
What is the purpose of using a routing zone inside Juniper Apstra software?
- A. A routing zone is defined to secure the routing protocols.
- B. A routing zone is used to enable L4-L7 inspection inside the fabric.
- C. A routing zone defined at the Apstra manager level requires firewalls to be deployed.
- D. A routing zone is used to enable the communication between two VNIs within a VRF.
Answer: D
Explanation:
According to the Juniper documentation1, a routing zone is an L3 domain, the unit of tenancy in multi-tenant networks. You create routing zones for tenants to isolate their IP traffic from one another, thus enabling tenants to re-use IP subnets. In addition to being in its own VRF, each routing zone can be assigned its own DHCP relay server and external system connections. You can create one or more virtual networks within a routing zone, which means a tenant can stretch its L2 applications across multiple racks within its routing zone. For virtual networks with Layer 3 SVI, the SVI is associated with a Virtual Routing and Forwarding (VRF) instance for each routing zone isolating the virtual network SVI from other virtual network SVIs in other routing zones. Therefore, the correct answer is D. A routing zone is used to enable the communication between two VNIs within a VRF. A routing zone is not used for L4-L7 inspection, securing routing protocols, or requiring firewalls. Those are not the purposes of a routing zone in Juniper Apstra software. References: Routing Zones
NEW QUESTION # 35
Exhibit.
Referring to the exhibit, how many tack types ate used in the staged blueprint?
- A. two
- B. seven
- C. three
- D. six
Answer: A
Explanation:
Referring to the exhibit, the image shows the Racks table under the Staged menu in the Juniper Apstra UI. The Racks table displays the details of the racks that are used in the blueprint, such as the name, rack type, and date. The rack type is a resource that defines the type and number of leaf devices, access switches, and/or generic systems that are used in rack builds1. The image shows seven racks in the table, but only two rack types: BorderLeaf and ServerRack. Therefore, the statement D is correct in this scenario.
The following three statements are incorrect in this scenario:
* A. six. This is not true, because there are not six rack types in the table, but only two. The number six corresponds to the number of racks that have the same rack type: ServerRack.
* B. three. This is not true, because there are not three rack types in the table, but only two. The number
* three does not correspond to any relevant information in the table or the image.
* C. seven. This is not true, because there are not seven rack types in the table, but only two. The number seven corresponds to the total number of racks in the table, not the rack types.
References:
* Rack Types (Datacenter Design)
* Racks (Staged)
NEW QUESTION # 36
Which attribute enables Juniper Apstra to scale and manage thousands of devices with a single server instance?
- A. Apstra is based on NGINX.
- B. Apstra is installed as a cloud resource.
- C. Apstra is a distributed state system.
- D. Apstra is available as an OVA.
Answer: C
Explanation:
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
NEW QUESTION # 37
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.)
- A. unused
- B. generic
- C. router
- D. firewall
Answer: A,B
Explanation:
When working with logical devices, you specify where each port group is connected by selecting the port group layout and the port speed and role (s) for each port group. The Juniper Apstra UI offers two options to the operator for the port group role: unused and generic1.
* Unused: This option means that the port group is not configured or used by Apstra. This can be useful for ports that are faulty, reserved, or not part of the data center fabric1.
* Generic: This option means that the port group is configured with a generic role that is not specific to any device type or function. This can be useful for ports that are used for testing, troubleshooting, or custom purposes1. References:
* Logical Devices
NEW QUESTION # 38
Exhibit.
Referring to the exhibit, what is the minimum information you must add to create a new routing zone?
- A. VRF Name, VLAN ID.AndVNI
- B. VRF Name only
- C. VRF Name, VLAN ID, VNI, Routing Policies
- D. VRF Name and Routing policies
Answer: A
Explanation:
To create a new routing zone, you must specify the VRF Name, VLAN ID, and VNI for the routing zone.
These are the mandatory fields in the user interface shown in the exhibit. The VRF Name is the name of the L3 domain that isolates the IP traffic of the routing zone from other routing zones. The VLAN ID is the identifier for the VLAN tagged Layer 3 links on external connections. The VNI is the VxLAN Network Identifier associated with the routing zone. The Routing Policies are optional fields that allow you to configure import and export route targets for the routing zone. These are onlyapplicable for EVPN routing zones, which use MP-EBGP as the overlay control protocol. The other options are incorrect because:
* A. VRF Name only is wrong because you also need to specify the VLAN ID and VNI for the routing zone.
* B. VRF Name and Routing policies is wrong because you also need to specify the VLAN ID and VNI for the routing zone. Routing policies are optional and only relevant for EVPN routing zones.
* D. VRF Name, VLAN ID, VNI, Routing Policies is wrong because Routing Policies are optional and not required to create a new routing zone. References:
* Routing Zones (Virtual)
* Data Center Automation Using Juniper Apstra
NEW QUESTION # 39
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