Echte und neueste JN0-650 Fragen und Antworten der Juniper JN0-650 Zertifizierungsprüfung

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Juniper JN0-650 Prüfungsplan:

ThemaEinzelheiten
Thema 1
  • Layer 2 Authentication and Access Control: This domain examines network access control mechanisms including 802.1x, MAC RADIUS, captive portal, server fail fallback, guest VLANs, and multi-method authentication considerations.
Thema 2
  • IP Telephony Features: This section focuses on features supporting VoIP deployments including Power over Ethernet, LLDP
  • LLDP-MED protocols, and voice VLAN implementation.
Thema 3
  • IP Multicast: This domain addresses one-to-many communication using multicast routing, covering addressing, ASM vs SSM models, RPF, IGMP
  • snooping, PIM sparse-mode, rendezvous points, Anycast RP, MSDP, and routing policies.
Thema 4
  • BGP: This section focuses on Border Gateway Protocol operations including route selection, next hop resolution, BGP attributes, communities, load balancing, IPv4
  • IPv6 address families, advanced options, and routing policy implementation.
Thema 5
  • Class of Service (CoS): This domain covers QoS mechanisms in Junos including CoS processing, header fields, forwarding classes, classification, policers, schedulers, drop profiles, shaping, and rewrite rules.
Thema 6
  • EVPN: This section addresses Ethernet VPN technology for Layer 2 over Layer 3 connectivity, covering EVPN route types, VXLAN encapsulation, and multi-homing configurations.
Thema 7
  • Interior Gateway Protocols (IGPs): This domain covers internal routing protocols operating within a single autonomous system, including OSPFv2, OSPFv3, and routing policy implementation, along with configuration, troubleshooting, and monitoring skills.

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Juniper Enterprise Routing and Switching, Professional (JNCIP-ENT) JN0-650 Prüfungsfragen mit Lösungen (Q33-Q38):

33. Frage
Exhibit

As shown in the exhibit, you have implemented CoS classifiers using Differentiated Services Code Point (DSCP) In this scenario, which two statements are correct? (Choose two.)

Antwort: B,C

Begründung:
The exhibit shows a custom Behavior Aggregate (BA) classifier named my-classifier for the Differentiated Services Code Point (DSCP) protocol.
Importing Defaults (Statement C): The configuration line import default; is crucial. In Junos OS, when you create a custom classifier, you can use this statement to import the default mapping table for all code points that you have not explicitly defined in the current block. This ensures that only the specific traffic types you care about are customized while the rest follows industry-standard defaults.
Logical Interface Association (Statement A): In the Junos class-of-service hierarchy, classifiers are typically applied to logical interfaces (e.g., ge-0/0/0.0). While they can sometimes be applied at a higher level, the standard practice for enterprise routing and switching is to associate them with the logical unit to provide granular control over subinterfaces or VLAN-tagged traffic.
Why others are incorrect: Statement B is less accurate because the primary binding point in Junos is the unit (logical interface). Statement D is incorrect because the specific classifications defined in the custom block override the defaults; they are not overwritten by them.


34. Frage
In the context of Junos, what is the purpose of the 'multicast' routing-options configuration hierarchy?

Antwort: A


35. Frage
You are configuring CoS throughout your enterprise network using DSCP. You have configured MF classification on your edge devices and are using BA classifiers throughout the core You are using the EZQoS template provided on your EX Series switches that are acting as your edge devices. You have loaded the configuration group and applied it to the appropriate interfaces. Classification and scheduling are working properly on your edge devices; however, traffic is not being classified correctly when it reaches your core devices In this scenario, which statement is correct about solving this problem?

Antwort: D

Begründung:
In an end-to-end CoS (Class of Service) design, there is a clear distinction betweenclassificationat the ingress andrewrite rulesat the egress.
* The Problem:Your edge devices are successfully classifying traffic (assigning packets to internal forwarding classes). However, the core devices-which useBA (Behavior Aggregate) classifiers-are not classifying correctly. BA classifiers look at the bits in the packet header (like DSCP or 802.1p) to determine priority.
* The Missing Link (Option C):When a packet leaves the edge device, its internal forwarding class and loss priority must be "written" back into the packet header so that the next-hop (the core device) can see it. By default, Junos may not preserve or set these bits correctly on egress. You must applyrewrite rules on the edge switches' egress interfaces facing the core. These rules ensure the DSCP values in the headers match the forwarding class determined by the edge's MF classifier, allowing the core's BA classifier to function properly.
* Other Options:Option A(policer) handles rate limiting, not classification.Option Bis incorrect because core devices often have different hardware or scaling needs than edge switches, and standard BA configuration is preferred over templates in the core.Option Dis incorrect because MF classifiers are standard for edge devices where deep packet inspection is needed to identify traffic types.


36. Frage
Click the Exhibit button.

You need to dynamically assign network devices to different VLANs based on their MAC addresses. You want to separate VoIP phones from regular PCs connected to the same unmanaged switch. This switch then connects to a single port on an EX Series switch.
Referring to the exhibit, which statement describes how you apply the MAC_BASED_VLAN filter to achieve the requested filter-based VLAN functionality for devices connecting to ge-0/0/0.0?

Antwort: C

Begründung:
For filter-based VLAN assignment on EX Series switches, the firewall filter must be applied to the physical interface in the input direction under the ethernet-switching family. This allows the switch to inspect incoming Layer 2 frames and dynamically assign devices to VLANs based on their source MAC addresses.


37. Frage
Which three MSTP parameters must match on all switches in the same MST region? (Choose three.)

Antwort: A,D,E


38. Frage
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