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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Blueprint Operations | 15% | - Day-to-day management
|
| Topic 2: Data Center Multitenancy | 10% | - Multitenant design
|
| Topic 3: Intent-Based Analytics | 10% | - Operational insights
|
| Topic 4: Juniper Apstra Architecture | 15% | - Intent-based networking principles
|
| Topic 5: Apstra Design Phase | 15% | - Configuration and validation
|
| Topic 6: Data Center Architectures | 20% | - IP Fabrics
|
| Topic 7: Apstra Build and Deploy Phases | 15% | - Configuration management
|
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NEW QUESTION # 43
You are considering the bridged overlay EVPN-VXLAN architecture. In this scenario, how many VLANs would be enabled in the VLAN-based service type at the MAC-VRF EVPN instance level?
Answer: D
Explanation:
In Junos EVPN, the service type determines how VLANs (broadcast domains) are mapped into EVPN constructs. With VLAN-based service, the mapping is one-to-one: a single VLAN (single broadcast domain) maps to a single EVPN instance (EVI), resulting in a separate bridge table per VLAN. When you implement EVPN-VXLAN in a bridged overlay (L2 extension over an L3 underlay), leaf devices act as VTEPs and encapsulate VLAN traffic into VXLAN using the associated VNI, but the service-type mapping rule still applies.
At the MAC-VRF hierarchy, you configure the EVPN-VXLAN parameters and choose the service type for that EVPN instance. If the service type selected is VLAN-based, then the EVI represents exactly one VLAN at that EVPN instance level. If you need multiple VLANs under the same MAC-VRF/EVI construct, Junos provides alternative service types (for example, VLAN-aware or VLAN-bundle) specifically intended to associate multiple VLANs with a single EVPN instance; that is not what VLAN-based service does.
Therefore, in a bridged overlay EVPN-VXLAN design using VLAN-based service at the MAC-VRF EVPN instance level, the correct answer is one VLAN. This remains true regardless of how many total VLANs exist across the fabric; each VLAN-based EVI handles a single VLAN.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/junos/evpn/topics/concept/evpn-based-services.html
https://www.juniper.net/documentation/us/en/software/junos/evpn/topics/concept/mac-vrf-routing-instance-overview.html
NEW QUESTION # 44
What is the purpose of a Juniper Apstra rack?
Answer: A
Explanation:
A Juniper Apstra rack is a physical entity that contains one or more network devices, such as leaf nodes, access switches, or generic systems. A rack is used to organize and manage the network devices in the Apstra software application. A rack has the following characteristics:
It stores information on how leaf nodes connect to generic devices. This is because a rack can include generic systems, which are devices that are not managed by Juniper Apstra, but are connected to the network. A generic system can be a server, a firewall, a load balancer, or any other device that has a network interface. A rack stores the information on how the leaf nodes, which are the devices that provide access to the end hosts, connect to the generic devices, such as the port number, the link speed, the LAG mode, and the roles1.
It has a rack type, which defines the type and number of leaf devices, access switches, and/or generic systems that are used in the rack. A rack type is a resource that is created in the data center design phase, and it does not specify the vendor or the model of the devices. A rack type can be predefined or custom-made, and it can be used to create multiple racks with the same structure and configuration2.
It has a rack build, which assigns the specific vendor and model of the devices to the rack. A rack build is created in the staged phase, and it uses the rack type as a template. A rack build can also assign the resources, such as the IP addresses, the ASNs, and the VNIs, to the devices in the rack3.
It has a rack deployment, which applies the network configuration and services to the devices in the rack. A rack deployment is performed in the active phase, and it uses the rack build as a reference. A rack deployment can also monitor the network performance and compliance of the devices in the rack4.
The following three statements are incorrect in this scenario:
It stores information on how pods connect to super spines. This is not true, because a rack does not store any information on the pod or the super spine level of the network. A pod is a cluster of leaf and spine devices that form a 3-stage Clos topology, and a super spine is a device that connects multiple pods in a 5-stage Clos topology. A rack only stores information on the leaf and the access level of the network1.
It stores IP address and ASN pool information. This is not true, because a rack does not store any information on the IP address and ASN pools. IP address and ASN pools are resources that are created in the data center design phase, and they contain a range of IP addresses and ASNs that can be assigned to the devices and the virtual networks. A rack only uses the IP address and ASN pools to assign the resources to the devices in the rack build2.
It stores device port data rates and vendor information. This is not true, because a rack does not store any information on the device port data rates and vendor information. The device port data rates and vendor information are specified in the rack build, which assigns the specific vendor and model of the devices to the rack. A rack only uses the rack build to apply the network configuration and services to the devices in the rack deployment3.
Reference:
Racks (Staged)
Rack Types (Datacenter Design)
Rack Builds (Staged)
Racks (Active)
NEW QUESTION # 45
In Juniper Apstra, which statement about resources is correct?
Answer: D
Explanation:
In Apstra 5.1, "resources" are the identifier values consumed by the fabric design and rendered into device configuration-examples include ASNs, IP addresses, VNIs, VLAN-related identifiers (where applicable), and similar allocation-driven values. These values are provided through resource pools, which are the authoritative containers Apstra draws from when assigning resources to blueprint roles (for example, leaf ASNs, spine ASNs, loopbacks, point-to-point subnets, and VNI ranges). A key architectural feature is that resource pools are not confined to one blueprint. Apstra supports pools with different scopes to match operational needs: some pools are managed centrally and reused across multiple blueprints, while other pools are created and used within the context of a specific blueprint when you want strict separation and lifecycle alignment with that blueprint.
This is why the correct statement is that a pool's scope can be global or blueprint-specific. Global pools are appropriate when you want consistent allocation policy across fabrics (for example, enterprise-wide ASN ranges). Blueprint-specific pools are appropriate when you want per-fabric independence or when allocations are generated dynamically within the blueprint. This scope behavior is independent of Junos v24.4; Junos receives the final rendered values, but the pool scoping and allocation control are Apstra design-time constructs that ensure deterministic, conflict-free assignments at scale.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/concept/resources.html
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/concept/freeform-resource-management.html
https://www.juniper.net/documentation/us/en/software/apstra5.1/apstra-user-guide/topics/ref/resource-pools-api.html
NEW QUESTION # 46
You have an EVPN-VXLAN data center IP fabric, with all single-homed hosts/servers.
Which two EVPN route types are present in this scenario? (Choose two.)
Answer: A,C
Explanation:
In an EVPN-VXLAN data center fabric with all single-homed hosts, the following EVPN route types are present:
- Type 3 (Inclusive Multicast Ethernet Tag):
Used for building multicast trees to support BUM (Broadcast, Unknown unicast, and Multicast) traffic in the VXLAN fabric.
- Type 2 (MAC/IP Advertisement):
Used to advertise MAC and optional IP addresses associated with end hosts (such as servers), which is necessary for host reachability in the EVPN fabric.
NEW QUESTION # 47
You want to keep virtual networks isolated from each other within the Juniper Apstra system. In this scenario, what are three ways to accomplish this task? (Choose three.)
Answer: A,B,C
Explanation:
To keep virtual networks isolated from each other within the Juniper Apstra system, you can use one or more of the following methods:
Enable Security Policy for virtual networks in the same Routing Zone. This allows you to define rules that control the traffic flow between different virtual networks within the same routing zone.
You can specify the source and destination virtual networks, the protocol, the port, and the action (allow or deny) for each rule. The security policy is applied on the ingress interface of the leaf devices.
Use Connectivity Templates to block access within the same Routing Zone. This allows you to customize the connectivity between different racks within the same routing zone. You can create templates that define the link type, the routing protocol, and the access control list (ACL) for each rack pair. The ACL can be used to filter the traffic based on the source and destination IP addresses, the protocol, and the port.
Put each network in different Routing Zones. This allows you to create logical boundaries between different virtual networks based on the route target (RT) values. A routing zone is a collection of virtual networks that share the same RT for importing and exporting routes. Virtual networks in different routing zones do not exchange routes with each other, unless you configure remote EVPN gateways to connect them.
NEW QUESTION # 48
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