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Juniper JN0-650 Exam Overview:

Certification Vendor:Juniper Networks
Exam Name:Enterprise Routing and Switching, Professional (JNCIP-ENT)
Exam Number:JN0-650
Exam Duration:120 minutes
Real Exam Qty:70-80
Related Certifications:JNCIA-ENT (JN0-347)
JNCIS-ENT (JN0-349)
Exam Price:$400 USD
Passing Score:Pass / Fail (variable scale)
Available Languages:English, Japanese
Exam Format:Multiple Choice, Multiple Select, Simulation, Drag and Drop
Certificate Validity Period:3 years
Sample Questions:Juniper JN0-650 Sample Questions
Exam Way:Online Proctored (OnVue) / In-Person Testing Center (Pearson VUE)
Pre Condition:JNCIA-ENT (JN0-347) or equivalent knowledge recommended; no mandatory prerequisite for exam eligibility
Official Syllabus URL:https://www.juniper.net/us/en/training/certification/track-data-center.html

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Juniper JN0-650 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Ethernet Switching and Spanning Tree: This section covers advanced Layer 2 switching including filter-based VLANs, private VLANs, MVRP, Layer 2 tunneling via Q-in-Q and L2PT, plus MSTP and VSTP protocols.
Topic 2
  • IP Telephony Features: This section focuses on features supporting VoIP deployments including Power over Ethernet, LLDP
  • LLDP-MED protocols, and voice VLAN implementation.
Topic 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.
Topic 4
  • EVPN: This section addresses Ethernet VPN technology for Layer 2 over Layer 3 connectivity, covering EVPN route types, VXLAN encapsulation, and multi-homing configurations.
Topic 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.
Topic 6
  • 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.
Topic 7
  • 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.

Juniper Enterprise Routing and Switching, Professional (JNCIP-ENT) Sample Questions (Q78-Q83):

NEW QUESTION # 78
Which two statements are correct about OSPFv2 and OSPFv3? (Choose two.)

Answer: A,D

Explanation:
OSPFv2 (IPv4) and OSPFv3 (IPv6) share many fundamental concepts, such as the SPF algorithm and the use of areas, but they have distinct differences in how they handle prefix information and LSA headers in Junos OS.
Backbone Requirement (Option C): Both OSPFv2 and OSPFv3 utilize a hierarchical structure. In both versions, all areas must connect to a central Area 0 (the backbone) to allow for inter-area routing. If an area is not physically connected to Area 0, a virtual link must be established.
Flooding Scope (Option D): One of the significant architectural changes in OSPFv3 is the inclusion of the flooding scope directly into the LSA header. In OSPFv3, the LS Type field is expanded to 16 bits, where the top three bits define the flooding scope (e.g., Link-local, Area, or AS scope). This allows routers to understand how far an LSA should be propagated without needing to understand the specific LSA type itself.
LSA Prefix Information (Option A): This statement is misleading. In OSPFv2, Router and Network LSAs (Type 1 and 2) carry both topology and prefix information. However, a key design goal of OSPFv3 was to separate topology from prefix information. In OSPFv3, Type 1 and 2 LSAs only describe the topology, while prefixes are carried in new LSA types: Intra-Area-Prefix-LSAs (Type 9) and Link-LSAs (Type 8).
Processing (Option B): OSPFv2 is processed " per-subnet " because it forms adjacencies based on IPv4 subnets. OSPFv3 is processed " per-link " , meaning it forms adjacencies between interfaces on the same physical link regardless of whether they share a common IPv6 prefix.


NEW QUESTION # 79
You are troubleshooting an EVPN-VXLAN IP fabric and observe the loop shown in the exhibit.

Which two steps would you take to further troubleshoot this problem? (Choose two.)

Answer: A,B


NEW QUESTION # 80
Exhibit.

Referring to the exhibit, what is required for the BGP peering to establish?

Answer: D

Explanation:
In this scenario, router1 (AS 65001) is attempting to establish an External BGP (EBGP) peering with router2 (AS 65002) using their loopback (lo0) interface addresses (192.168.1.1 and 172.16.1.1).
According to the Junos OS 24.4 documentation on BGP peering sessions:
EBGP TTL Default: By default, EBGP packets are sent with a Time-to-Live (TTL) value of 1. This assumes the peer is directly connected on a shared physical subnet.
Loopback Peering Challenge: When peering between loopback addresses, the destination IP is not on the same subnet as the physical ingress interface. Even if the routers are directly connected physically, the router treats the loopback interface as an additional " hop " . With a TTL of 1, the BGP packet expires before it can be processed by the peer ' s routing engine.
The Multihop Solution (Option D): To allow this session to form, you must configure the multihop statement under the BGP neighbor hierarchy. This tells Junos to increase the TTL (the default becomes 64 when multihop is enabled) and allows the session to establish even though the peer ' s address is not directly connected.
Target Neighbor: The neighbor address specified in the configuration on router1 must be the remote loopback address of router2 (172.16.1.1).
Option A (Multipath) is incorrect because it is used for load balancing across multiple active BGP paths, not for initial session establishment.
Options B and C are incorrect because they reference physical interface addresses (10.10.20.1 or 10.10.10.1) which are not the addresses being used for the loopback-based BGP session.


NEW QUESTION # 81
You are implementing an EVPN-VXLAN edge-routed bridging design using Layer 3 gateway operations. In this scenario, which statement is correct?

Answer: A

Explanation:
In anEVPN-VXLAN Edge-Routed Bridging (ERB)architecture, also known as a collapsed fabric, the Layer
3 default gateway functionality is moved from the core/spine layer down to the edge (the leaf or distribution layer).
* Anycast Gateways:To support seamless host mobility and redundancy, multiple distribution/leaf switches are configured with thesame anycast IP addressandMAC addresson their IRB interfaces for a given VLAN. This allows a host to move between different switches without needing to update its default gateway configuration or ARP cache.
* Distributed Routing:Routing occurs locally at the edge (distribution layer). Traffic destined for a different subnet is routed by the first switch it hits (the ingress leaf), rather than being backhauled to a central core router.
* Symmetric vs. Asymmetric IRB:Junos OS 24.4 supports both models, but the ERB design typically utilizes symmetric routing for better scalability, where each leaf only needs to know the routes for its locally connected VNIs and uses a transit VNI for inter-subnet communication.
Option Ais incorrect because while unique IPscanbe used (Method 1 in some docs), the defining characteristic of an efficient ERB design is the use of shared Anycast IPs for the gateway.Option Cdescribes a Centrally-Routed Bridging (CRB) design, not ERB.


NEW QUESTION # 82
Which two statements are true regarding bidirectional PIM? (Choose two.)

Answer: A,B


NEW QUESTION # 83
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