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Juniper JN0-650 Exam Syllabus Topics:

Topic	Details
Topic 1	IP Telephony Features: This section focuses on features supporting VoIP deployments including Power over Ethernet, LLDP LLDP-MED protocols, and voice VLAN implementation.
Topic 2	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 3	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 4	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.
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	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.

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Juniper Enterprise Routing and Switching, Professional (JNCIP-ENT) Sample Questions (Q18-Q23):

NEW QUESTION # 18
In OSPF, how does a router ensure that LSAs advertised to a neighboring router are received?

A. LSAs are acknowledged by the neighboring router.
B. LSAs are sent over a TCP connection.
C. LSA flooding guarantees that all routers will receive them successfully.
D. LSAs are advertised with an acknowledgement bit.

Answer: A

Explanation:
Link-state acknowledgment (LSAck)messages provide reliability to the link-state exchange process, by explicitly acknowledging receipt of a Link State Update message. The LSA acknowledgment, explicitly acknowledged, that it have received a LSA, by mirroring it back.

NEW QUESTION # 19
Click the Exhibit button.

Referring to the exhibit, which two statements are correct? (Choose two.)

A. The route is a Type 1 EVPN route.
B. The route is generated because a host is multihomed to multiple leaf nodes.
C. The route is a Type 2 EVPN route.
D. The route is generated because a host is single-homed to one leaf node.

Answer: A,B

Explanation:
The route shown is an AD/EVI route, which identifies it as an EVPN Type 1 route. This route type is used for Ethernet auto-discovery and is generated for multihomed Ethernet segments so remote leaf devices can perform aliasing and fast convergence.

NEW QUESTION # 20
Exhibit.

Referring to the exhibit, you see that the 0.0.0.0/0 route is coming from AS 64512.
What is the command to achieve this task?

A. show route protocol bgp source-gateway <peer ip>
B. show route receive-protocol bgp <peer ip>
C. show route receive-protocol bgp <peer ip> hidden
D. show route protocol bgp next-hop < peer ip>

Answer: C

Explanation:
The exhibit shows a BGP routing process where an Import Policy is being applied to routes received in the RIB-IN. Specifically, Policy 1 states: "Reject 0.0.0.0/0 from AS 64512." In Junos OS, when a routing policy rejects a route, that route is not placed in the main routing table (inet.0) for active use. Instead, it becomes a hidden route. To verify that a specific peer is actually sending a route that is subsequently being rejected by your policy, you must use specific diagnostic commands:
* Understanding "Hidden" Routes: When a BGP route is received but fails to meet policy requirements (or has an unreachable next-hop), Junos keeps it in the BGP RIB-IN but marks it as
"hidden." It will not appear in a standard show route command.
* Command Logic (Option D): The command show route receive-protocol bgp <peer ip> hidden allows an administrator to view all routes received from a specific neighbor, including those that were rejected by import policies.
* show route receive-protocol bgp <peer ip>: Shows only the routes that passed the import policy and were accepted into the table. Since the 0.0.0.0/0 route from AS 64512 is explicitly rejected in the exhibit, it would not show up here.
* Adding the hidden keyword is the essential step to see the rejected default route and verify that AS 64512 is indeed sending it before the policy drops it.
* Other Options:
* Option A is incorrect because it only shows accepted routes.
* Option B and C are used to filter the existing active routing table based on gateway or next-hop attributes, but they cannot show routes that have been rejected and excluded from that table.

NEW QUESTION # 21
Click the Exhibit button.

Referring to the exhibit, R2 receives a packet from the multicast source on its ge-0/0/4.0 interface.
Which two statements are correct in this scenario? (Choose two.)

A. The packet is discarded.
B. All interfaces other than ge-0/0/4.0 will be on the outgoing interface list.
C. R2 verifies the existing unicast routing table and determines that this interface is not on the reverse path back to the source.
D. R2 determines that the packet is coming in on an interface that is on the reverse path back to the source.

Answer: A,C

Explanation:
R2 uses RPF (Reverse Path Forwarding) checks to verify that multicast packets arrive on the interface that is on the shortest path back to the source. Since the packet arrives on ge-0/0/4.0, which is not the RPF interface toward 192.168.100.10 (the correct RPF interface is ge-0/0/1.0 toward 172.18.1.1), the packet fails the RPF check and is discarded to prevent loops.

NEW QUESTION # 22
Which EVPN route type is used for fast convergence and for advertising the split horizon label?

A. Type 2
B. Type 4
C. Type 1
D. Type 5

Answer: C

NEW QUESTION # 23
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