Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT)

QUESTION NO: 1
Referring to the exhibit, which configuration change is needed for an IS-IS Level 1 adjacency between R1 and R2?

A. Disable Level 2 on R2's ge-0/0/1 interface B. Configure the lo0 family ISO address 49.0002.0010.0042.0002.00 on R2 C. Enable Level 2 on R1's ge-0/0/1 interface D. Configure the lo0 family ISO address 49.0002.0010.0042.0002.00 on R1

Correct Answer: B

QUESTION NO: 2
You are asked to create a new firewall filter to evaluate Layer 3 traffic that is being sent between VLANs. In this scenario, which two statements are correct? (Choose two.)

A. You should apply the firewall filter to the appropriate IRB interface. B. You should create a family Ethernet-switching firewall filter with the appropriate match criteria and actions. C. You should create a family inet firewall filter with the appropriate match criteria and actions. D. You should apply the firewall filter to the appropriate VLAN.

Correct Answer: A,C

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QUESTION NO: 3
You have two OSPF routers forming an adjacency. R1 has a priority of 32 and a router ID of
192.168.1.2. R2 has a priority of 64 and a router ID of 192.168.1.1. The routers were started at the same time and all other OSPF settings are the default settings.
Which statement is correct in this scenario?

A. R1 will be the BDR. B. R2 will be the BDR. C. Router IDs must match for an adjacency to form. D. At least three routers are required for a DR/BDR election

Correct Answer: A

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QUESTION NO: 4
You want to verify prefix information being sent from 10.36.1.4.
Which two statements are correct about the output shown in the exhibit? (Choose two.)

A. The routes displayed have traversed one or more autonomous systems. B. The output shows routes that are active and rejected by an import policy. C. The routes displayed are being learned from an I BGP peer. D. The output shows routes that were received prior to the application of any BGP import policies.

Correct Answer: A,D

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QUESTION NO: 5
Which two statements are correct about OSPF area types? (Choose two.)

A. The backbone area (area 0) must be a stub area. B. A not-so-stubby area (NSSA) allows external routes to be imported and translated into the backbone. C. A totally stubby area allows external routes but blocks summary LSAs. D. A stub area does not allow external routes to be flooded into it.

Correct Answer: B,D

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QUESTION NO: 6
Which statement correctly describes the purpose of the Junos OS "graceful restart" feature?

A. It allows a routing protocol to continue forwarding traffic during a Routing Engine switchover or restart without disrupting the network. B. It automatically reboots all line cards when a Routing Engine fails. C. It disables all routing protocols during a switchover. D. It is only applicable to static routes.

Correct Answer: A

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QUESTION NO: 7
Which two statements are correct about link aggregation? (Choose two.)

A. All RE-generated traffic traverses the lowest member link. B. LAGs provide physical layer redundancy. C. Member links must use the same MTU. D. IP traffic is hashed using source and destination MAC addresses.

Correct Answer: B,C

QUESTION NO: 8
Which two elements are used to create the STP bridge ID? (Choose two.)

A. the root port number B. the port cost C. the system MAC address D. the bridge priority value

Correct Answer: C,D

QUESTION NO: 9
Your network has two ISPs available. You want to ensure that all outbound traffic is routed out ISP-1. If the connection to ISP-1 fails, all outbound traffic is routed to the backup ISP, ISP-2. In this scenario, how should you configure BGP on your network?

A. Configure the gateway for ISP-1 with a higher peer ID than the gateway for ISP-2. B. Set the local-preference attribute to a higher value for ISP-2 than ISP-1. C. Set the local-preference attribute to a higher value for ISP-1 than ISP-2. D. Configure the gateway for ISP-1 with a higher origin code than the gateway for ISP-2.

Correct Answer: C

QUESTION NO: 10
You want to redistribute the static routes into BGP, but they do not show as BGP routes.
What causes this result to occur?

A. The static routes do not have a valid next hop. B. A community string must be configured. C. The no-readvertisefeature is specified. D. The as-pathparameter must be specified.

Correct Answer: A

QUESTION NO: 11
You enable persistent MAC learning on your Juniper switch. In this scenario, which statement is correct?

A. You can enable persistent MAC learning on an interface where MAC learning is disabled. B. You can only enable persistent MAC learning on an interface on which 802.1x authentication is configured. C. You can enable persistent MAC learning on an interface that is part of a redundant trunk group. D. You can only enable persistent MAC learning on an interface in access mode.

Correct Answer: D

QUESTION NO: 12
Which statement correctly describes the purpose of BPDU protection in Junos OS?

A. It prevents the local switch from processing configuration changes. B. It disables a port that receives a BPDU when the port is configured as an edge port, preventing unauthorized switches from participating in the spanning tree. C. It replaces the need for root protection. D. It is used only on trunk ports carrying multiple VLANs.

Correct Answer: B

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QUESTION NO: 13
You are a network operator troubleshooting BGP connectivity.
Which two statements are correct about the output shown in the exhibit? (Choose two.)

A. The BGP session is not established. B. The routers are exchanging IPv4 routes. C. The R1 is configured for AS 65400. D. Peer 10.32.1.2 is configured for AS 63645.

Correct Answer: B,C

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QUESTION NO: 14
Which statement correctly describes the purpose of a routing policy's "then" clause in Junos OS?

A. It defines the actions taken when a route matches the specified conditions, such as accept, reject, or attribute modification. B. It defines the match conditions for the policy. C. It is only used for firewall filters, not routing policies. D. It applies only to OSPF external routes.

Correct Answer: A

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) - JN0-351 Exam Questions