Juniper Juniper Certifications JN0-351 Questions & Answers

• Question 101:

  What is a purpose for the OSPF database description packet?

  A. to transfer the LSA headers between two systems

  B. to determine who is in charge of database flushing

  C. to transfer the LSUs between two systems

  D. to determine who is in charge of adjacency formation

  Correct Answer: A

• Question 102:

  Click the Exhibit button.

  

  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?

  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.

  Correct Answer: D

• Question 103:

  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?

  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.

  Correct Answer: B

• Question 104:

  You are a service provider and have multiple customers in a building.

  You are installing a new switch that can host all of your customers. However, you would like to ensure that one customer cannot see or broadcast to another customer.

  You would also like to have them use a common gateway IP address from the building.

  What should be used to provide this access?

  A. VLAN

  B. private VLAN

  C. filter-based VLAN

  D. Layer 2 tunneling

  Correct Answer: B

• Question 105:

  Which two statements about BPDU protection are correct? (Choose two.)

  A. By default, you must manually clear a BPDU error condition when using BPDU protection.

  B. BPDU protection prevents unauthorized switches from connecting to and participating in your spanning tree topology.

  C. By default, BPDU protection prevents the root bridge from communicating with other STP members unless it receives a superior BPDU first.

  D. BPDU protection requires that STP or RSTP is configured on the switch.

  Correct Answer: AB

• Question 106:

  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?

  A. route B

  B. route D

  C. route A

  D. route C

  Correct Answer: B

• Question 107:

  Which two statements are true about GRE tunnels on Junos devices? (Choose two.)

  A. Only one GRE tunnel can be included for each logical unit.

  B. Multiple GRE tunnels can be included for each logical unit.

  C. GRE interfaces can include multiple logical units.

  D. GRE interfaces can include only a single logical unit.

  Correct Answer: AC

• Question 108:

  By default, how long will a learned MAC address be retained in the bridge table on an EX Series switch?

  A. 600 seconds

  B. 3600 seconds

  C. 300 seconds

  D. 1800 seconds

  Correct Answer: C

• Question 109:

  Which two port security mechanisms rely on an accurate DHCP snooping database to operate correctly? (Choose two.)

  A. IP source guard

  B. persistent MAC learning

  C. MACsec

  D. dynamic ARP inspection

  Correct Answer: AD

• Question 110:

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

  A. Type 1 router LSAs

  B. Type 2 network LSAs

  C. Type 3 summary LSAs

  D. Type 4 ASBR summary LSAs

  Correct Answer: CD