Juniper JN0-650 PDF Questions - Great Exam Study Tips

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Juniper JN0-650 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Layer 2 Switching	15%	- Spanning Tree Protocols (STP, RSTP, MSTP) - BPDU Protection, Loop Protection - VLANs and VLAN Trunking Protocol (VTP) - Link Aggregation (LACP) - Layer 2 Forwarding and MAC Table Management
Topic 2: Security and Automation	15%	- Zero Touch Provisioning (ZTP) - 802.1X (Port-Based Network Access Control) - Interactive CLI and scripts - Storm Control and Port Security - Ansible and Jinja2 templating - MACsec (Encryption at Layer 2) - Junos PyFMT (Python-based automation)
Topic 3: Network Optimization and Monitoring	15%	- Simple Network Management Protocol (SNMP) - Class of Service (CoS) — schedulers, drop profiles, rewrite rules - sFlow and Port Mirroring for traffic analysis - Junos Analytics and Streaming Telemetry - OpenConfig and YANG
Topic 4: Layer 3 Routing	20%	- OSPF (Multi-area, LSA types, SPF calculation) - Load Balancing and ECMP - BGP (iBGP, eBGP, route reflectors, confederations) - Route Redistribution and Route Filtering - Policy-Based Routing - IS-IS (single area, multi-area)
Topic 5: Services	15%	- Firewall Filters (ACLs) and Policers - DNS Relay - DHCP Relay and Snooping - Quality of Service (QoS) — classification, policing, shaping, queuing
Topic 6: High Availability	20%	- Non-Stop Routing (NSR) - Bidirectional Forwarding Detection (BFD) - Graceful Routing Engine Switchover (GRES) - In-Service Software Upgrade (ISSU) - IP Surveillance and Multicast RP - Non-Stop Bridging (NSB) - Virtual Chassis (VC) and Virtual Chassis Fabric (VCF)

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Juniper Enterprise Routing and Switching, Professional (JNCIP-ENT) Sample Questions (Q115-Q120):

NEW QUESTION # 115
Which statement is true regarding color-aware tricolor marking?

A. Packets that are previously marked cannot be changed.
B. Packets that are marked as yellow can be changed to green.
C. Packets that are marked as red can be changed to yellow.
D. Packets that are marked as green can be changed to yellow.

Answer: D

NEW QUESTION # 116
Which two statements are correct about multicast routing tables? (Choose two.)

A. MBGP and IS-IS place routes in met. l directly.
B. IS-IS and OSPFv3 place routes in met. 2 directly.
C. inet. 2 is used when the multicast forwarding topology differs from unicast forwarding
D. inet. 0 is used for RPF checks.

Answer: C,D

Explanation:
Junos OS uses specific routing tables for handling multicast traffic to ensure loop prevention through Reverse Path Forwarding (RPF) checks:
* Multicast RPF (Option C):Theinet.0table is the default unicast routing table. In most standard multicast deployments, Protocol Independent Multicast (PIM) performs itsRPF checksagainst this table to determine the upstream interface toward the multicast source.
* Topology Differences (Option A):Theinet.2table is specifically designed for multicast RPF lookups when themulticast forwarding topology differsfrom the unicast forwarding topology. This is common in environments using Multiprotocol BGP (MBGP) where you might want multicast traffic to follow a different path than standard data traffic.
* inet.1 Role (Option B):Theinet.1table is themulticast forwarding cache. It stores (S,G) and (*,G) entries for actual packet forwarding. Routing protocols like MBGP or IS-IS do not place routesdirectly into inet.1; instead, PIM uses information from inet.0 or inet.2 to populate inet.1.
* IS-IS and OSPFv3 (Option D):These protocols place their IPv4/IPv6 unicast routes into inet.0 or inet6.
0. They do not place routes into inet.2 "directly" unless specific RIB-group configurations or address families are enabled to share those routes for multicast RPF purposes.

NEW QUESTION # 117
Click the Exhibit button.

You are asked to configure VLAN load balancing on your network using MSTP.
Referring to the exhibit, which two statements are correct? (Choose two.)

A. Switch1 will be the root bridge for msti 2.
B. Switch1 will not assume the role of root bridge for both msti1 and msti2 if Switch2 goes down.
C. Switch1 will assume the role of root bridge for both msti1 and msti2 if Switch2 goes down.
D. Switch1 will be the root bridge for msti 1.

Answer: A,D

Explanation:
In MSTP, the bridge priority determines the root bridge for each MSTI. In the first configuration, MSTI 1 has priority 8k and MSTI 2 has 4k. After the second configuration, MSTI 1 priority is 4k and MSTI 2 is 8k. Assuming Switch1 has the lowest priority in each MSTI compared to other switches, it will become the root bridge for MSTI 1 and MSTI 2, achieving VLAN load balancing across MSTIs.

NEW QUESTION # 118
You have PIM SM multicast configured and running in a network environment comprised of EX4300 devices. Your customers report increased delay when switching channels using IPTV. To help decrease the delay, you implement PIM join load balancing.
You add the set protocols pim join-load-balance command to the configuration. After committing, you notice that the flows are still using only one path.
In this scenario, which statement is correct?

A. The interfaces must be specified to use for load balancing.
B. IGMP snooping must also be configured.
C. The clear pim join-distribution command must be issued.
D. PIM join load-balancing only works for PIM-DM.

Answer: C

NEW QUESTION # 119
Which two statements are true regarding BGP route advertisements? (Choose two.)

A. Routes received from external peers are advertised to internal and external peers.
B. Routes received from an internal peer are advertised to other internal peers.
C. Routes received from an internal peer are not advertised to other internal peers.
D. Routes received from external peers are only advertised to other external peers.

Answer: A,C

NEW QUESTION # 120
......

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