(2026) JN0-352 Dumps and Practice Test (149 Questions) [Q22-Q45]

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(2026) JN0-352 Dumps and Practice Test (149 Questions)

Guide (New 2026) Actual Juniper JN0-352 Exam Questions

Juniper JN0-352 Exam Syllabus Topics:

Section	Objectives
Topic 1: Operations and Troubleshooting	– Junos CLI monitoring tools – Troubleshooting routing and switching issues
Topic 2: Layer 2 Switching Technologies	– VLANs and trunking – Spanning Tree Protocol (STP/RSTP/MSTP) – Ethernet switching concepts
Topic 3: Network Services	– NAT concepts in Junos – Basic multicast concepts
Topic 4: High Availability	– Redundancy concepts in enterprise networks – VRRP configuration and behavior
Topic 5: Routing Protocols	– BGP fundamentals and policy control – OSPF configuration and troubleshooting – IS-IS overview
Topic 6: Routing Policy and Filtering	– Route filtering and preference control – Policy statements

NO.22 Your GRE tunnel is not transitioning to the Upstatus. What would be the first step in troubleshooting the problem?

Verify tunnel endpoint reachability.

Verify that the status of the management interface is up.

Verify the status of the management routing instance.

Verify that the routing instance for GRE tunnels is created.

NO.23 Which two BGP attributes must be supported by all BGP implementations and must be included in every update? (Choose two.)

AS path

MED

next hop

community

NO.24 Referring to the exhibit, which policy will export routes to IBGP peers?

static-3

static-4

static-1

static-2

NO.25 Which command displays the output shown in the exhibit?

show route forwarding-table

show ethernet-switching table

show ethernet-switching table extensive

show route forwarding-table family ethernet-switching

NO.26 You are troubleshooting a Layer 2 topology issue in a campus network. The switches are running RSTP. You need to verify which switch is currently acting as the root bridge and identify the root port on the local device.
Which operational command should the administrator use to view this information?

show spanning-tree interface

show spanning-tree bridge

show ethernet-switching table

show ethernet-switching interface

NO.27 You are an operator for a network running IS-IS. Two routers are failing to form an adjacency.
What are two reasons for this problem? (Choose two.)

There are mismatched router IDs on the L2 routers.

There is no configured ISO address on any IS-IS interface.

There is a mismatched area ID between the L2 routers.

The family iso configuration is missing from the adjacency interface.

NO.28 You are using OSPF to advertise the subnets that are used by the Denver and Dallas offices. The routers that are directly connected to the Dallas and Denver subnets are not advertising the connected subnets.
Referring to the exhibit, which two statements are correct? (Choose two.)

Create static routes on the switches using the local vMX router’s loopback interface for the next hop.

Configure and apply a routing policy that redistributes the Dallas and Denver subnets using Type
5 LSAs.

Configure and apply a routing policy that redistributes the connected Dallas and Denver subnets.

Enable the passive option on the OSPF interfaces that are connected to the Dallas and Denver subnets.

NO.29 You are establishing a new BGP session to an EBGP peer using loopback addresses.
In addition to your general EBGP settings, which BGP feature must be enabled for this session to establish?

multihop

multipath

damping

passive

NO.30 What is a purpose of using a spanning tree protocol?

to look up MAC addresses

to eliminate broadcast storms

to route IP packets

to tunnel Ethernet frames

NO.31 You want to prevent rogue BPDUs from lab devices reaching the internal through the Lab_Switch device.

Referring to the exhibit, what should be done to accomplish this task?

Configure the three lab ports as edge ports

Configure an input filter on interface xe-0/2/0 to discard the RSTP packets

Configure the three lab ports under the protocols layer2-control bpdu-block hierarchy on the switch

Configure protocols rstp with the bpdu-block-on-edge parameter for interface xe-0/2/0

NO.32

Click the Exhibit button.
A network includes several autonomous systems that exchange routing information using BGP. Multiple BGP routes exist for the same prefix.
Referring to the exhibit, which attribute would BGP use first when selecting a preferred route?

local preference

AS path length

origin type

MED

NO.33 A recent security audit indicates that peer-to-peer applications are allowed on the guest VLAN and employees may have been using the guest VLAN for this purpose. You deploy the configuration shown in the exhibit, but it does not stop the peer-to-peer traffic.

In this scenario, what must you do to implement the security policy?

Implement 802.1X on the guest VLAN

Attach the filter to the VLAN

Deploy storm control to block unknown unicast traffic

Use persistent MAC learning

NO.34

Click the Exhibit button.
You are troubleshooting an aggregated Ethernet interface on a Juniper Networks EX Series Switch. The aggregated Ethernet interface does not appear in the output shown in the exhibit.
Which action will solve this problem?

Configure the number of aggregated Ethernet devices under the [edit chassis] hierarchy.

Install the aggregated Ethernet interface license on the switch.

Restart the switch to enable the aggregated Ethernet switching process.

Configure LACP passive-mode.

NO.35 You want to configure a floating static route.
What must be configured in this scenario?

priority

preference

qualified-next-hop

next-hop

NO.36 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?

Disable level 2 for the interfaces.

Disable level 1 for the interfaces.

Disable wide metrics.

Change the local IS-IS area ID to 49.0002.

NO.37 What is the management IP address of the device shown in the exhibit?

10.210.20.233

172.23.12.100

128.0.0.1

172.23.11.10

NO.38 You have configured OSPF routing as shown in the exhibit. You notice that all interfaces have formed full adjacencies, with the exception of the interfaces connecting R3 and R4 with a status of 2Way.

What is the reason for this status?

The two routers must both be configured as DR routers.

DROther routers will not form a full adjacency with each other.

The two routers must be configured in different areas.

The interface-type is not configured as p2p.

NO.39 You are receiving the BGP route shown in the exhibit from four different upstream ISPs.
Referring to the exhibit, which ISP will be selected as the active path?

ISP 1

ISP 3

ISP 4

ISP 2

NO.40 A GRE tunnel is experiencing fragmentation issues. You confirm that the tunnel is up and is functioning correctly. You confirm that hosts are sending 1500-byte packets.
In this scenario, which statement is correct?

You should use the clear-dont-fragment parameter to allow fragmentation.

You should lower the physical interface’s MTU to 1476 bytes to avoid fragmentation.

You should enable BFD to more rapidly identify tunnel link failures.

You should use ToS copying to reduce header size.

NO.41 The ISP1.inet.0 route table has currently no routes in it.
What will happen when you commit the configuration shown on the exhibit?

The inet.0 route table will be completely overwritten by the ISP1.inet.0 route table.

The inet.0 route table will be imported into the ISP1.inet.0 route table.

The ISP1.inet.0 route table will be completely overwritten by the inet.0 route table.

The ISP1.inet.0 route table will be imported into the inet.0 route table.

NO.42 You are asked to create a default route that will be advertised to your internal OSPF neighbors.
You have three upstream connections to the Internet and you must ensure that when available, all traffic uses ISP1 as your primary connection and only uses ISP2 and ISP3 when ISP1 is not available. Which solution should you implement in this scenario?

Create a default static route with ISP1’s address as the next hop while specifying the addresses for ISP2 and ISP3 as qualified next hops with a preference value of six or higher.

Create a default generate route that includes an import policy to match BGP routes from ISP1 and assign a preference value of four or less.

Create a default static route with each neighbor address as the next hop.

Create a default aggregated route.

NO.43 Refer to Exhibit:

Click the Exhibit button.
Which two statements about the output shown in the exhibit are correct? (Choose two.)

A designated router is elected for each IS-IS interface.

R3 cannot establish an L2 adjacency on the ge-0/0/2.0 interface.

R3 uses its loopback interface to establish an L2 IS-IS adjacency.

R3 advertises its loopback interface IP address.

NO.44 You are asked to explore adding BGP route reflectors to allow for increased scale in your core network. Which statement is correct in this scenario?

The cluster ID is required to prevent routing loops.

Route reflectors are required whenever internal BGP (IBGP) sessions are needed.

The cluster ID is not required to use route reflectors.

Route reflectors require that the network is connected in a physical full mesh.

NO.45 You need to configure a LAG between your switches. In this scenario, which two statements are correct? (Choose two.)

Duplex and speed settings are not required to match on both participating devices.

Duplex and speed settings are required to match on both participating devices.

Member links are not required to be contiguous ports.

Member links are required to be contiguous ports.