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Juniper JN0-349 Exam Topics:

Section	Objectives
Layer 2 Switching or VLANs	Identify the concepts, operation, or functionality of Layer 2 switching for the Junos OS Bridging components Frame processing Describe the concepts, benefits, or functionality of VLANs Ports Tagging Native VLANs and voice VLANs Inter-VLAN routing Demonstrate knowledge how to configure, monitor or troubleshoot Layer 2 switching or VLANs Interfaces and ports VLANs Inter-VLAN Routing
Protocol Independent Routing	Identify the concepts, operation or functionality of various protocol-independent routing components Static, aggregate, and generated routes Martian addresses Routing instances, including RIB groups Load balancing Filter-based forwarding Demonstrate knowledge how to configure, monitor, or troubleshoot various protocol-independent routing components Static, aggregate, and generated routes Load balancing Filter-based forwarding
Tunnels	Identify the concepts, requirements or functionality of IP tunneling Tunneling applications and considerations GRE IP-IP Demonstrate knowledge of how to configure, monitor or troubleshoot IP tunnels GRE IP-IP Troubleshooting tools (e.g., ping, traceroute, trace options, show commands, logging)
Layer 2 Security	Identify the concepts, benefits or operation of various Layer 2 protection or security features BPDU, loop or root protection Port security, including MAC limiting, DHCP snooping, Dynamic ARP inspection (DAI) or IP source guard MACsec Storm control Identify the concepts, benefits or operation of Layer 2 firewall filters Filter types Processing order Match criteria and actions Demonstrate knowledge how to configure, monitor, or troubleshoot Layer 2 security Protection Port security Storm control Firewall filter configuration and application
High Availability	Identify the concepts, benefits, applications or requirements for high availability in a Junos OS environment Link aggregation groups (LAG) Redundant trunk groups (RTG) Virtual Chassis Graceful restart (GR) Graceful Routing Engine switchover (GRES) Nonstop active routing (NSR) Nonstop bridging (NSB) Bidirectional Forwarding Detection (BFD) Virtual Router Redundancy Protocol (VRRP) Unified In-Service Software Upgrade (ISSU) Demonstrate knowledge of how to configure, monitor, or troubleshoot high availability components LAG and RTG Virtual Chassis GR, GRES, NSB, and NSR VRRP ISSU Troubleshooting tools (e.g., trace options, show commands, logging)
BGP	Describe the concepts, operation or functionality of BGP BGP basic operation BGP message types Attributes Route/path selection process IBGP and EBGP functionality and interaction Demonstrate knowledge of how to configure, monitor, or troubleshoot BGP Groups and peers Additional basic options Routing policy application Troubleshooting tools (e.g., ping, traceroute, trace options, show commands, logging)
IS-IS	Describe the concepts, operation or functionality of IS-IS Link-state database IS-IS PDUs TLVs Adjacencies and neighbors Levels and areas Designated intermediate system (DIS) Metrics Demonstrate knowledge of how to configure, monitor or troubleshoot IS-IS Levels, interfaces and adjacencies Additional basic options Routing policy application Troubleshooting tools (e.g., ping, traceroute, trace options, show commands, logging)
OSPF	Describe the concepts, operation or functionality of OSPF Link-state database OSPF packet types Router ID Adjacencies and neighbors Designated router (DR) and backup designated router (BDR) OSPF area and router types Realms LSA packet types Demonstrate knowledge how to configure, monitor or troubleshoot OSPF Areas, interfaces and neighbors Additional basic options Routing policy application Troubleshooting tools (e.g., ping, traceroute, trace options, show commands, logging)

Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q40-Q45):

NEW QUESTION # 40
In the exhibit, each IP subnet in the network is associated with a unique VLAN ID.
Which action will ensure that Host C will communicate with Host A and Host B?

A. Configure all switch ports connecting to the host devices as access ports associated with a
common VLAN.
B. Configure an IRB interface for each VLAN and associate It with its corresponding VLAN.
C. Configure a port-based ACL that permits inter-VLAN routing for all configured VLANs.
D. Configure all switch ports connecting to the host devices as trunk ports associated with all VLANs

Answer: A

NEW QUESTION # 41
What are two benefits of 802.3ad link aggregation? (Choose two)

A. It increases bandwidth
B. It ensures symmetrical paths
C. It simplifies interface configuration.
D. It creates physical layer redundancy.

Answer: A,D

Explanation:
Explanation
Aggregating multiple links between physical interfaces creates a single logical point-to-point trunk link or a LAG. The LAG balances traffic across the member links within an aggregated Ethernet bundle and effectively increases the uplink bandwidth. Another advantage of link aggregation is increased availability, because the LAG is composed of multiple member links. If one member link fails, the LAG continues to carry traffic over the remaining links.
https://www.juniper.net/documentation/us/en/software/junos/interfaces-ethernet-switches/topics/topic-map/switc

NEW QUESTION # 42
In which adjacency state do OSPF routers determine which router is in charge of the database synchronization process?

A. 2Way
B. Init
C. ExStart
D. Exchange

Answer: C

NEW QUESTION # 43
What are two advantages of a point-to-point OSPF adjacency? (Choose two.)

A. No type 2 LSAs are generated.
B. Only a DR is elected.
C. No type 1 LSAs are generated.
D. There is quicker neighbor establishment.

Answer: A,D

NEW QUESTION # 44
Click the Exhibit button.

Which statement is true about the configuration shown in the exhibit?

A. Both the adv-aggregate and adv-custom export policies will be evaluated when routes are sent to neighbor 172.30.2.1.
B. Only the next-hop-self export policy will be evaluated when routes are sent to neighbor 172.30.1.1.
C. Only the adv-custom export policy will be evaluated when routes are sent to neighbor 172.30.2.1.
D. Both the adv-aggregate and next-hop-self export policies will be evaluated when routes are sent to neighbor 172.30.1.1.

Answer: C

NEW QUESTION # 45
......

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