JN0-650 Valid Exam Objectives | JN0-650 Latest Exam Price

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Juniper JN0-650 Exam Syllabus Topics:

TopicDetails
Topic 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.
Topic 2
  • 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 3
  • 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 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
  • 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) Sample Questions (Q56-Q61):

NEW QUESTION # 56
Exhibit
Referring to the exhibit output, which statement is correct?

Answer: D

Explanation:
The exhibit displays the default-switch.evpn.0 routing table, which is used on Juniper leaf devices to store EVPN Type 2 (MAC/IP) routes.
* Route Distinguisher (Option C):In EVPN, theRoute Distinguisher (RD)is an 8-byte prefix added to a route to make it unique within the BGP control plane. The RD format in the exhibit is <IP-Address>:
<Identifier>.
* For example, the prefix 2:192.168.100.1:1::5010::... indicates an EVPN Type 2 route (2:) where
192.168.100.1:1 is theRoute Distinguisher.
* This RD identifies the specific routing instance on the originating VTEP that advertised the MAC
/IP address.
* Option A is incorrect:The RD 192.168.100.2:1 does not necessarily mean thehostdevice has that IP; it means theoriginating switchhas that router ID/IP used for its RD.
* Option B is incorrect:While the RD oftenincorporatesthe router ID, the RD itself is the full string (e.
g., 192.168.100.1:1), which is distinct from the raw Router ID used in the BGP summary.
* Option D is incorrect:Looking at the entries for 10.1.1.1 and 10.1.2.3, they are associated with different identifiers in the RD strings (5010 and 5020 respectively), which typically map to different VNIs or bridge domains.


NEW QUESTION # 57
You recently committed a change to a router to reject OSPF routes sourced from area 10.
However, you are still seeing area 10 routes in the routing table.
[edit policy-options]
policy-statement advertise-ospf-routes {
term reject-area-10 {
from {
protocol ospf;
area 10;
}
then {
reject;
}
}
term find-ospf {
from {
protocol ospf;
}
then {
accept;
}
}
}
Referring to the exhibit, which statement is correct?

Answer: D


NEW QUESTION # 58
Exhibit.

You have determined that traffic in your network is being routed through your route reflector instead of using the optimal path. Referring to the exhibit, what are two configuration changes on the route reflector that would solve the problem? (Choose two.)

Answer: A,D

Explanation:
The exhibit shows a BGP Route Reflector (RR) configuration where an export policy named NHS (Next-Hop Self) is applied to the internal BGP group int-group. The policy NHS sets the next-hop self attribute for BGP routes.
The Problem (Traffic Tromboning): In a standard BGP Route Reflector design, the RR should reflect routes without modifying the BGP next-hop attribute. By applying a next-hop self policy on the export to clients, the RR tells all its clients that it is the exit point for those routes. Consequently, all data plane traffic is sent to the RR first before being forwarded to the actual destination, rather than following the optimal direct path between clients. This is known as " traffic tromboning " or suboptimal routing.
The Solution (Option C): The most direct way to fix this is to delete the export policy that is forcing the next- hop to be the RR. By deleting protocols bgp group int-group export NHS, the RR will resume standard behavior and reflect the original next-hop received from the route source, allowing clients to route traffic directly to the correct destination.
The Refined Solution (Option D): If you must keep the NHS policy (perhaps for routes learned from external peers), you should ensure it only applies to those specific routes. By adding from route-type internal to the policy term and then potentially changing the logic (or simply narrowing the scope), you can prevent the RR from incorrectly applying next-hop self to internal routes that it is merely reflecting. In the context of this specific problem, Option D combined with a change in the policy ' s action or scope helps ensure reflected internal routes maintain their original, optimal next-hops.
Option A is incorrect because setting next-hop self for external routes is common practice, but it doesn ' t solve the problem of internal reflected routes being diverted to the RR.
Option B is incorrect because applying this as an import policy would change how the RR itself sees the routes, but it wouldn ' t fix the attributes being sent out to the clients in the reflection process.


NEW QUESTION # 59
You are asked to establish full connectivity between all devices in the BGP network. Referring to the exhibit, which two configuration changes will allow BGP route advertisements? (Choose two.)

Answer: B,C


NEW QUESTION # 60
For what purpose is the 'override-metric' used in an OSPF configuration on a Junos device?

Answer: A


NEW QUESTION # 61
......

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