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>> Certification JN0-481 Exam <<
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NEW QUESTION # 88
Which attribute enables Juniper Apstra to scale and manage thousands of devices with a single server instance?
Answer: B
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 the network 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. Reference:
JUNIPER APSTRA ARCHITECTURE
Apstra Server Requirements/Reference
Juniper Networks Apstra 4.0 enhances the experience of users and operators
NEW QUESTION # 89
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.)
Answer: B,D
Explanation:
EVPN route Type-3 is used to advertise the IP address of the VTEP and the VNIs that it supports.
This allows the VTEPs to discover each other and form VXLAN tunnels for the VNIs that they have in common. EVPN route Type-2 is used to advertise the MAC and IP addresses of the hosts connected to the VTEPs. This allows the VTEPs to learn the MAC-to-IP bindings and the MAC-to- VTEP mappings for the hosts in the same VNI. Therefore, these two types of VXLAN tunnels will be automatically created by the EVPN control plane when using Juniper Apstra with the ERB design blueprint and two virtual networks in a common routing zone.
NEW QUESTION # 90
Referring to the exhibit, which role does Device A serve in an IP fabric?
Answer: D
Explanation:
Device A serves as a spine in an IP fabric. An IP fabric is a network architecture that uses a spine-leaf topology to provide high performance, scalability, and reliability for data center networks. A spine- leaf topology consists of two layers of devices: spine devices and leaf devices.
Spine devices are the core devices that interconnect all the leaf devices using equal-cost multipath (ECMP) routing. Leaf devices are the edge devices that connect to the servers, storage, or other network devices. In the exhibit, Device A is connected to four leaf devices using multiple links, which indicates that it is a spine device.
NEW QUESTION # 91
You are using Juniper Apstra to manage your three-stage IP fabric. You have not enabled any IBA probes other than those that are enabled by default. You notice that both the Analytics tab and its child, Anomalies tab, have red indicators associated with them.
In this scenario, which condition is occurring in your network?
Answer: D
Explanation:
In Juniper Apstra, even without custom IBA probes, the system enables default probes that monitor critical control-plane elements such as BGP sessions. A red indicator on the Analytics โ Anomalies tabs signals a failure in one of these probes. In this case, the condition is that an expected BGP session between a spine and leaf node has failed to establish.
NEW QUESTION # 92
What is the purpose of an EVPN Ethernet segment identifier (ESI)?
Answer: A
Explanation:
An EVPN Ethernet Segment Identifier (ESI) is used to uniquely identify a multi-homed Ethernet segment, such as when multiple links from a device connect to the same EVPN fabric. Its primary purpose is to prevent loops within a LAG connection by ensuring only one active forwarding path while still enabling redundancy and load balancing.
NEW QUESTION # 93
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