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JN0-349 Enterprise Routing and Switching - Specialist (JNCIS-ENT) Questions and Answers

Questions 4

You must limit access to a printer with a persistent DHCP address of 2001:db8:0000:50::10/64 in VLAN v50 to users assigned to VLAN v50 only.

Which action would satisfy this requirement?

Options:

A.

Implement persistent MAC learning to ensure that 2001:db8:0000:50::10 is allocated properly.

B.

Implement a firewall filter on the IRB interface for VLAN v50, blocking traffic to/from 2001:db8:0000:50::10.

C.

Implement a firewall filter on the VLAN v50, blocking traffic to/from 2001:db8:0000:50::10.

D.

Implement DHCP snooping on VLAN v50 to ensure that 2001:db8:0000:50::10 is allocated properly.

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Questions 5

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 6

Click the exhibit button.

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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Questions 7

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 8

You were provided a network diagram that told you to number your network from the 191.255.0.0/16 space. OSPF is enabled and adjacencies are up, but no routers are learning any routes. What can explain this?

Options:

A.

The default OSPF export policies advertise nothing, so you need to apply export policy

B.

The default OSPF import policy rejects all OSPF routes, so you need to apply import policy

C.

You need to modify the martian table with a 191.255.0.0/16 accept statement

D.

You need to enable OSPF on the lo0 interface to provide a route to the RID of each router in the network

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Questions 9

Click the Exhibit button.

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 10

What are two interarea OSPF LSA types? (Choose two.)

Options:

A.

Type 1 router LSAs

B.

Type 2 network LSAs

C.

Type 3 summary LSAs

D.

Type 4 ASBR summary LSAs

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Questions 11

Click the Exhibit button.

Referring to the exhibit, which router will be selected as the DR?

Options:

A.

R1

B.

R5

C.

R4

D.

R3

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Questions 12

Click the Exhibit button.

A routing table contains multiple BGP routes to the same destination prefix. The route preference is the same for each route.

Referring to the exhibit, which route would be selected?

Options:

A.

route B

B.

route D

C.

route A

D.

route C

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Questions 13

What kind of filter would be written to protect control traffic destined for the switch?

Options:

A.

A filter applied to the default VLAN

B.

A filter applied to the native VLAN

C.

A filter applied to the management interface

D.

A filter applied to the loopback interface

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Questions 14

What are three types of port designation specific to Private VLANs? (Choose three.)

Options:

A.

Promiscuous ports

B.

Transparent ports

C.

PVLAN trunk ports

D.

Designated ports

E.

Isolated ports

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Questions 15

You are configuring IBGP and you must ensure that reachability is maintained between participating routers, even if the physical topology changes.

Which two actions should you perform in this scenario? (Choose two.)

Options:

A.

Configure DHCP on all IBGP devices.

B.

Configure an IGP within your IBGP network.

C.

Configure static routes to all IBGP peers.

D.

Configure IBGP peerings to loopback addresses.

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Questions 16

What BGP attribute is mostly likely to influence a remote AS that you do not peer with?

Options:

A.

This is not possible given the local scope of BGP

B.

AS path

C.

MED

D.

Local preference

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Exam Code: JN0-349
Exam Name: Enterprise Routing and Switching - Specialist (JNCIS-ENT)
Last Update: May 9, 2025
Questions: 110