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Title: JN0-650 New Cram Materials - Exam JN0-650 Format [Print This Page]
Author: pauljoh148    Time: 6 hour before
Title: JN0-650 New Cram Materials - Exam JN0-650 Format
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Juniper JN0-650 Exam Syllabus Topics:
TopicDetails
Topic 1
  • 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 2
  • 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 3
  • 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.
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
  • 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 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.

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Juniper Enterprise Routing and Switching, Professional (JNCIP-ENT) Sample Questions (Q52-Q57):NEW QUESTION # 52
Exhibit


You are asked to configure VLAN load balancing on your network using MSTP. Referring to the exhibit, which two statements are correct? (Choose two.)
Answer: A,D
Explanation:
The exhibit shows the MSTP configuration for two switches, switch1 and switch2. MSTP allows you to group multiple VLANs into a single Multiple Spanning Tree Instance (MSTI), enabling different root bridges and topologies for different sets of VLANs.
Root Bridge Election (Option B): For any Spanning Tree instance, the switch with the lowest bridge priority is elected as the root bridge.
For msti 2, switch1 has a priority of 4k (4096), while switch2 has a priority of 8k (8192).
Since 4096 < 8192, switch1 is elected the root bridge for msti 2.
Failover Behavior (Option D): Spanning Tree is designed for redundancy. If a primary root bridge fails, the remaining switches in the network re-elect a new root based on the next lowest priority.
If switch2 goes down, switch1 becomes the only switch in the region.
Regardless of its original priority (4k or 8k), switch1 will take over as the root bridge for both msti 1 and msti
2 because there are no other contenders with a better (lower) priority.
Incorrect Statements: Option A is incorrect because for msti 1, switch2 has the lower priority (4k vs. 8k), making switch2 the root bridge. Option C is incorrect because it contradicts the fundamental high-availability nature of Spanning Tree.

NEW QUESTION # 53
Your OSPF network consists of a mix of 1GbE and 10GbE interfaces. By default, all interfaces have the same cost in your OSPF network. You are asked to ensure that the 10GbE interfaces are more preferred when available In this scenario, which two statements would accomplish this behavior? (Choose two.)
Answer: B,D
Explanation:
OSPF determines the best path to a destination by calculating themetric (cost)of each link. By default, Junos OS uses areference bandwidthof100 Mbpsto calculate this cost using the formula:

When the reference bandwidth is left at the default 100 Mbps, any interface with a speed of 100 Mbps or higher (including 1 GbE and 10 GbE) is assigned a cost of1because the minimum OSPF cost is 1. This results in equal-cost paths, preventing the router from preferring the faster 10 GbE link.
To ensure 10 GbE interfaces are preferred, you must create a cost differential:
* Option A (Reference Bandwidth):By increasing the reference bandwidth to10G(or higher), the calculation changes. For a 10 GbE link, the cost becomes $10,000 / 10,000 = 1$. For a 1 GbE link, the cost becomes $10,000 / 1,000 = 10$. Since OSPF prefers the path with thelowest cumulative cost, the
10 GbE link is now preferred.
* Option D (Manual Metric):You can manually override the automatic cost calculation by assigning a higher metric specifically to the 1 GbE interfaces. If a 1 GbE interface is manually set to a cost of 50 and the 10 GbE interface remains at 1 (or is set to a lower value), the router will prioritize the 10 GbE path.
Option Bis incorrect because a higher metric makes a pathlesspreferred.Option Cis incorrect because a 1G reference bandwidth would still result in both 1 GbE and 10 GbE interfaces having a cost of 1.

NEW QUESTION # 54
You are securing the network using 802.1x access control.
You apply 802.1x authentication on the distribution switch, as shown in the exhibit.

You want to allow hosts beyond the distribution switch to have access to the network printer while requiring that all hosts connected to the access switch be authenticated to the network. How can you solve this?
Answer: C

NEW QUESTION # 55
In Junos, which configuration statement is used to enable IGMP snooping on a switch?
Answer: B

NEW QUESTION # 56
Which statement is true regarding virtual links in OSPF?
Answer: B

NEW QUESTION # 57
......
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