Juniper Juniper Certifications JN0-343 Questions & Answers

• Question 401:

  

  You just applied the Layer 2 firewall filter shown in the exhibit to a port as an input filter to block traffic from a one source MAC address. After monitoring the port, you notice that all traffic ingressing that port has stopped flowing. What is the problem?

  A. The traffic is being blocked on the egress port. Another Layer 2 firewall filter must be applied on the port to allow this traffic.

  B. All other traffic is matching the default term and being discarded.

  C. The Layer 2 firewall filters will not work at the port level. It must be applied at the VLAN level.

  D. The from criterion must match on destination-mac-address and not source-mac- address.

  Correct Answer: B

• Question 402:

  A switch has just come online and currently has no learned unicast entries in its bridge table. Which two statements regarding this switch and its operations are true? (Choose two.)

  A. All frames received through a switch port will be flooded out all other switch ports belonging to the same VLAN.

  B. All broadcast frames received through a switch port will be flooded out all switch ports, regardless of the VLAN.

  C. The switch will dynamically add MAC entries to the bridge table for the destination MAC address listed in received frames.

  D. The switch will dynamically add MAC entries to the bridge table for the source MAC address listed in received frames.

  Correct Answer: AD

• Question 403:

  Which two events trigger an IS-IS LSP to be sent to a neighboring IS? (Choose two)

  A. When a new IS-IS neighbor is detected.

  B. When the cost of a link to an existing IS-IS neighbor has changed.

  C. When a CSNP requests missing information.

  D. When a device does not receive an expected IIH PDU.

  Correct Answer: AB

• Question 404:

  UESTION NO: 191

  You want to configure per-flow equal-cost multipath (ECMP) load balancing for only the OSPF routes on Router-1. Which configuration example accomplishes this?

  A. protocols { ospf { export EMCP; } } policy-options { policy-statement ECMP { term first { from protocol ospf; then { load-balance per-packet; } } } }

  B. routing-options { export ECMP; } policy-options { policy-statement ECMP { term first { from protocol ospf; then { load-balance per-packet;

  }

  }

  }

  }

  C. routing-options { forwarding-table { export ECMP; } } policy-options { policy-statement ECMP { term first { from protocol ospf; then { load-balance per-packet; } } } }

  D. routing-options { forwarding-table { export ECMP; } } policy-options { policy-statement ECMP { term first { from protocol ospf; then { load-balance ECMP; } } } }

  Correct Answer: C

• Question 405:

  Which configuration excerpt is necessary to cause all traffic received on fe-0/0/0.0 to be routed to next-hop 10.1.1.1?

  A. interfaces { fe-0/0/0 { unit 0 { family inet { policy-route route-to-10.1.1.1; address 172.17.1.1/24; } } } } policy-options { policy-statement route-to-10.1.1.1 { term 1 { then { next-hop 10.1.1.1; } } } }

  B. interfaces { fe-0/0/0 { unit 0 { family inet { filter { input route-to-10.1.1.1; } address 172.17.1.1/24; } } } } firewall { family inet { filter route-to-10.1.1.1 { term 1 { then routing-instance to-10.1.1.1; } } } } routing-instances { to-10.1.1.1 { instance-type forwarding; routing-options { static { route 0.0.0.0/0 next-hop 10.1.1.1; } } } }

  C. interfaces { fe-0/0/0 { unit 0 { family inet { filter { input route-to-10.1.1.1; } address 172.17.1.1/24; } } } } firewall { family inet { filter route-to-10.1.1.1 { term 1 { then next-hop 10.1.1.1; } } } }

  D. interfaces { fe-0/0/0 { unit 0 { family inet { routing-instance to-10.1.1.1; address 172.17.1.1/24; } } } } routing-instances { to-10.1.1.1 { instance-type forwarding; routing-options { static { route 0.0.0.0/0 next-hop 10.1.1.1; } } } }

  Correct Answer: B

• Question 406:

  You run the operational-mode command show ospf neighbor and notice that an expected OSPF neighbor on a broadcast link is not detected. Which three issues cause this behavior? (Choose three.)

  A. A problem exists with the physical link or Data Link Layer connectivity.

  B. The router IDs on the two devices do not match.

  C. The IP subnet mask does not match on each end of the link.

  D. The area type does not match on each end of the link.

  E. The AS number on the two devices do not match.

  Correct Answer: ACD

• Question 407:

  BGP is best described as what type of routing protocol?

  A. link state

  B. distance vector

  C. path state

  D. path vector

  Correct Answer: D

• Question 408:

  By default, which VLAN ID value is associated with the default VLAN on EX Series switches?

  A. 0

  B. 1

  C. 32

  D. 255

  Correct Answer: A

• Question 409:

  What is one benefit of the root protection feature?

  A. It guards against loops caused by unidirectional link failures.

  B. It ensures downstream switches never become the root bridge.

  C. It disables the port when it detects that a loop has formed over an edge port.

  D. It guards against loops caused by a changed root bridge ID.

  Correct Answer: B

• Question 410:

  A switch port is sending both tagged and untagged traffic. What is its possible configuration?

  A. {master:0}[edit interfaces ge-0/0/0] user@switch# show unit 0 { family ethernet-switching { port-mode access; vlan { members data; } } }

  B. {master:0}[edit interfaces ge-0/0/0] user@switch# show unit 0 { family ethernet-switching { port-mode trunk; vlan { members data; } } }

  C. {master:0}[edit interfaces ge-0/0/0] user@switch# show unit 0 { family ethernet-switching { port-mode access; vlan { members data; } native-vlan-id data; } }

  D. [edit ethernet-switching-options] user@switch# show voip { interface all; vlan voiceVLAN; forwarding-class expedited-forwarding; } } [edit vlans] user@switch# show voiceVLAN { vlan-id 3; } } [edit interfaces] user@switch# show ge-0/1/1 { unit 0 { family ethernet-switching { port-mode access; } } }

  Correct Answer: D