JN0-349 Actual Questions Answers PDF 100% Cover Real Exam Questions
JN0-349 Exam questions and answers
NEW QUESTION 13
Which protocol prevents loops and calculates the best path through a switched network that contains redundant paths?
- A. DHCP
- B. VRRP
- C. STP
- D. IS-IS
Answer: C
NEW QUESTION 14
Exhibit.
Referring to the exhibit, which statement is correct?
- A. This switch has a bridge priority of 8k.
- B. The ge-0/0/9 interface is using the default interface priority value.
- C. The ge-0/0/15 interface is using the default port cost.
- D. This switch is currently blocking all traffic.
Answer: A
NEW QUESTION 15
Which two requirements must be satisfied before graceful restart work? [Choose two)
- A. a neighbor configured with BfD
- B. a neighbor configured with graceful restart
- C. a neighbors with an uptime greater than an hour
- D. a stable network topology
Answer: B,D
Explanation:
https://www.oreilly.com/library/view/juniper-mx-series/9781449358143/ch09s03.html
The primary drawback to GR is the need for protocol extensions and helper support in
neighboring routers, and a stable network topology. If any neighbors do not support GR, or if
other changes occur in the network, GR ends up aborting and loss results in the dataplane. Even
when all goes to plan and the GR event succeeds, which means there is zero loss in the data
plane, there is still control plane flap and a subsequent need for protocol reconvergence between
the restarting router and its helpers.
NEW QUESTION 16
Click the Exhibit button.
Your router is configured to peer with your ISP's router using BGP. You can only control your BGP configuration.
Which address families are negotiated between the two BGP peers shown in the exhibit?
- A. inet-unicast inet-vpn-unicast 12vpn
- B. inet-unicast inet-vpn-unicast 12vpn-signaling
- C. inet-vpn-unicast
- D. inet-unicast
Answer: D
NEW QUESTION 17
What are two methods for reducing the size of an OSPF link-state database? (Choose two.)
- A. Use unique router IDs where possible.
- B. Use identical link metrics where possible.
- C. Use stub areas where possible.
- D. Use point-to-point interface types where possible.
Answer: C,D
NEW QUESTION 18
Click the Exhibit button.
Referring to the exhibit, which router becomes the OSPF DR when all routers are powered on at the same time?
- A. R1
- B. R4
- C. R3
- D. R2
Answer: D
Explanation:
Explanation
https://sites.google.com/site/amitsciscozone/home/juniper-junos/junos--ospf-designated-router OSPF DR Election: On a broadcast network, DR election takes place based on OSPF router priority. The Priority is set to 128 by default by JUNOS software. In case of a tie, the router with highest router-id is elected the DR.
NEW QUESTION 19
Which device is used to separate collision domains?
- A. router
- B. firewall
- C. switch
- D. hub
Answer: C
NEW QUESTION 20
Which two port security features use the DHCP snooping database for additional port security?
(Choose two.)
- A. IP Source guard
- B. MACsec
- C. MAC learning
- D. dynamic ARP inspection
Answer: A,D
NEW QUESTION 21
Exhibit.
Referring to the exhibit, the local router should have an IS-IS adjacency with a neighboring router, but the adjacency never establishes correctly.
What should you do to solve the problem?
- A. Disable level 1 for the interfaces.
- B. Disable wide metrics.
- C. Disable level 2 for the interfaces.
- D. Change the local IS-IS area ID to 49.0002.
Answer: D
NEW QUESTION 22
Which Junos feature allows you to combine multiple interfaces into a single bundle?
- A. LAG
- B. NSB
- C. VRRP
- D. Virtual Chassis
Answer: A
NEW QUESTION 23
You are adding a new EX4300 member switch to your existing EX4300 Virtual Chassis. However, the new member is not running the same Junos version as the other members.
By default, what is the expected behavior in this scenario?
- A. The new switch will be assigned a member ID and then placed in an inactive state.
- B. The new switch is not recognized by the virtual Chassis.
- C. The virtual Chassis will transition into a brain situation between the existing master Routing Engine and the switch running the different version.
- D. The new switch will be assigned a member ID and then placed in an inactive state.
Answer: D
Explanation:
Explanation
https://www.juniper.net/documentation/en_US/junos/topics/concept/virtual-chassis-ex4200-software-automatic-u
NEW QUESTION 24
Which two characteristics are true for EBGP peerings? (Choose two.)
- A. EBGP connect peer devices in two different autonomous systems.
- B. EBGP connects peer device in the same autonomous system.
- C. EBGP peers must be directly connected.
- D. EBGP peers can be connected over a multihop connection.
Answer: A,D
NEW QUESTION 25
Exhibit.
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 trunk ports associated with all VLANs
- B. Configure a port-based ACL that permits inter-VLAN routing for all configured VLANs.
- C. Configure an IRB interface for each VLAN and associate It with its corresponding VLAN.
- D. Configure all switch ports connecting to the host devices as access ports associated with a common VLAN.
Answer: D
NEW QUESTION 26
What are two benefits of 802.3ad link aggregation? (Choose two)
- A. It increases bandwidth
- B. It simplifies interface configuration.
- C. It ensures symmetrical paths
- D. It creates physical layer redundancy.
Answer: A,D
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/switches-interface-aggregated.html
NEW QUESTION 27
You want to configure Layer 2 services over an IP-based tunneling mechanism between two
sites.
Which configuration statement is required to accomplish this task?
- A. Set interface ip-0/0/0.0 family bridge
- B. Set interface ip-00/0/0.0 encapsulation valn-bridge
- C. Set interface gr-0/0/0.0 family bridge
- D. Set interfaces gr--0/0/0.0 encapsulation vlan-bridge
Answer: C
NEW QUESTION 28
What are two interarea OSPF LSA types? (Choose two.)
- A. Type 1 router LSAs
- B. Type 4 ASBR summary LSAs
- C. Type 3 summary LSAs
- D. Type 2 network LSAs
Answer: B,C
NEW QUESTION 29
You are enabling dynamic ARP inspection on an EX4300 switch Which service is enabled by default in this scenario?
- A. MAC limiting
- B. persistent MAC learning
- C. IP Source Guard
- D. DHCP snooping
Answer: D
NEW QUESTION 30
When configuring firewall filters, which function does the interface-specificparameter enable on an EX Series switch?
- A. The interface-specific parameter is required to configure port-based firewall filters.
- B. The interface-specific parameter is required to configure port-specific counters.
- C. The interface-specific parameter is required to configure VLAN-specific counters.
- D. The interface-specific parameter is required to configure VLAN-based filters.
Answer: B
NEW QUESTION 31
Which two statements are correct regarding the root bridge election process when using STP?
(Choose two )
- A. A lower system MAC address is preferred
- B. A higher bridge priority is preferred
- C. A higher system MAC address is preferred
- D. A lower bridge priority is preferred
Answer: A,D
NEW QUESTION 32
Referring to the exhibit, which configuration will force traffic to always use ae0.0 as long as it is
active?
- A. Option D
- B. Option C
- C. Option B
- D. Option A
Answer: B
Explanation:
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/redundant-trunk-
groups.html
1. set protocols rstp disable
2. set redundant-trunk-group group name interface interface-name primary
3. set redundant-trunk-group group name interface interface-name
4. option: set redundant-trunk-group group name preempt-cutover-timer seconds
Rapid Spanning Tree Protocol (RSTP) is enabled by default on EX Series switches to create a
loop-free topology, but an interface is not allowed to be in both a redundant trunk group and in a
spanning-tree protocol topology at the same time.
NEW QUESTION 33
Which static route next-hop value indicates that the packet will be silently dropped?
- A. resolve
- B. next-table
- C. discard
- D. reject
Answer: C
NEW QUESTION 34
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Juniper JN0-349 Exam Syllabus Topics:
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