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  5. Enterprise Routing and Switching - Specialist (JNCIS-ENT) Questions and Answers
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Free Practice Questions for the Juniper JNCIS-ENT JN0-349 Exam (2026 Updated)

At Marks4sure, we are dedicated to providing IT professionals with the most accurate and reliable preparation materials for the Juniper JN0-349 exam. To support your certification journey, we have made a selection of our premium 2026 JNCIS-ENT practice questions and answers available completely free. You can take this practice test as many times as you need. Every question includes a detailed, expertly verified explanation to ensure you fully grasp the core security concepts before test day.

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Questions 4

Click the Exhibit button.

JN0-349 Question 4

Your company has connections to two ISPs. Each ISP is in a separate routing instance. You need to advertise the 0.0.0.0/0 prefix from both ISPs to all your devices.

Referring to the exhibit, which statement is true in this scenario?

Options:

A.

You must create and apply match input filters on interfaces ge-0/0/2 and ge-0/0/3.

B.

You must create a policy to allow traffic from your network to each ISP.

C.

You must create an internal routing instance for your network.

D.

You must create a RIB group to share interface routes.

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Questions 5

You are configuring IS-IS on the newly provisioned ae88 interface. After you commit the configuration, you notice that your adjacency is not showing up.

JN0-349 Question 5

Referring to the exhibit, what is the reason for the adjacency being down?

Options:

A.

R1 and R2 are configured for different metrics.

B.

R1 and R2 are in different IS-IS levels.

C.

R1 and R2 have different interface parameters.

D.

R1 and R2 are configured for different areas.

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Questions 6

Which two statements about Layer 2 firewall filters are correct? (Choose two.)

Options:

A.

You can apply only one firewall filter term per filter.

B.

You can apply only one input filter per VLAN.

C.

You can apply multiple firewall filter terms per filter.

D.

You can apply multiple input filters per VLAN.

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Questions 7

Which three statements describe what happens when processing a frame for a switched packet? (Choose three.)

Options:

A.

The ingress PFE performs the MAC address lookup.

B.

The frame enters the ingress port and is forwarded out all ports.

C.

The frame enters the ingress port and is processed by the ingress PFE.

D.

The ingress PFE sends the header information to the Routing Engine.

E.

The egress PFE forwards the packet out the egress port towards the destination.

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Questions 8

Your BGP router receives routes from two upstream ISPs: ISP A and ISP B.

In this scenario, which change would you make to prefer routes from ISP A?

Options:

A.

Set the local-preference attribute for all routes received from ISP A to 200 while all routes received from ISP B use the default local-preference value of 100.

B.

Prepend the AS path to all routes received from ISP A while all routes received from ISP B use the default AS path value.

C.

Change the MED value for all routes received from ISP A to 1 while all routes from ISP B remain configured with no MED value.

D.

Set the local-preference attribute for all routes received from ISP A to 50 while all routes received from ISP B use the default local-preference value of 100.

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Questions 9

Click the Exhibit button.

JN0-349 Question 9

You have created a GRE tunnel as shown in the exhibit. The router with tunnel endpoint A is dropping the packets originating from User A and destined to User B.

What would cause this problem?

Options:

A.

Endpoint A has the internet-options gre-path-mtu-discovery parameter enabled.

B.

User A requested fragmentation and Endpoint A has the clear-dont-fragment-bit parameter enabled.

C.

Endpoint A is missing a policy statement that allows User A’s traffic into the tunnel.

D.

User A is sending maximum size default Ethernet frames with the DF bit enabled.

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Questions 10

Which statement is correct about the OSPF router ID (RID)?

Options:

A.

The OSPF RID must match for all routers in the same area.

B.

The OSPF RID for IPv6 is a 128-bit address.

C.

The OSPF RID for IPv4 is a 32-bit address.

D.

The OSPF RID is not necessary when BFD is implemented.

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Questions 11

Click the Exhibit button.

JN0-349 Question 11

Referring to the exhibit, which statement is correct?

Options:

A.

The router is acting as the DR.

B.

The router is acting as the BDR.

C.

The router is acting as a DROther.

D.

The router is not able to establish an adjacency.

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Questions 12

Which statement is correct about access ports?

Options:

A.

Access ports must have an IRB assigned to accept untagged traffic.

B.

By default, access ports accept only VLAN tagged traffic.

C.

Access ports must have an IRB assigned to accept VLAN tagged traffic.

D.

By default, an access port can have only a single VLAN assigned.

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Questions 13

What are two Layer 2 firewall filter types? (Choose two.)

Options:

A.

port-based

B.

packet-based

C.

flow-based

D.

VLAN-based

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Questions 14

Each PC and IP phone in your network is connected to a switch using the same port. All incoming data traffic is untagged and belongs to the v10 VLAN, while traffic coming from the IP phones is tagged with a VLAN value of 20 and should belong to the v20 VLAN on your switch.

In this scenario, which statement is correct?

Options:

A.

You must enable the voice VLAN feature on the incoming interfaces and assign the v20 VLAN.

B.

You must enable an IRB interface and assign it to the v10 and v20 VLANs.

C.

You must enable LLDP-MED on the incoming interfaces and assign the v20 VLAN.

D.

You must enable the guest VLAN feature on the incoming interfaces and assign the v20 VLAN.

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Questions 15

Click the Exhibit button.

JN0-349 Question 15

Which type of route is shown in the exhibit?

Options:

A.

generated

B.

direct

C.

aggregate

D.

static

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Questions 16

Click the exhibit button.

JN0-349 Question 16

Switch-1 in the exhibit receives a packet from User A with a destination MAC address of 00:26:88:02:74:47.

Which statement in this scenario is correct?

Options:

A.

Switch-1 sends the packet out ge-0/0/7 only.

B.

Switch-1 sends the packet out ge-0/0/7 and ge-0/0/8.

C.

Switch-1 sends the packet out ge-0/0/6, ge-0/0/7, ge-0/0/8, and ge-0/0/9.

D.

Switch-1 sends the packet out ge-0/0/7, ge-0/0/8, and ge-0/0/9.

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Exam Code: JN0-349
Exam Name: Enterprise Routing and Switching - Specialist (JNCIS-ENT)
Last Update: May 31, 2025
Questions: 110