Juniper Juniper Certifications JN0-343 Questions & Answers

• Question 211:

  You have an Ethernet frame with an unknown destination address.

  Which steps are required for the switch to process and forward the Ethernet frame?

  A. 1. The frame enters the ingress port and Packet Forwarding Engine (PFE).

  2.

  The ingress PFE performs the MAC address lookup, determines the egress PFE and port.

  3.

  The ingress PFE forwards the frame to the egress PFE.

  4.

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

  B. 1. The frame enters the ingress port and PFE.

  2.

  The ingress PFE performs the MAC address lookup and determines the source MAC is unknown.

  3.

  The ingress PFE sends the header information to the RE, where the MAC is added.

  4.

  If the RE adds a new source MAC address to the bridge table, the newly added MAC entry is sent to all PFEs.

  C. 1. The frame enters the ingress port and PFE.

  2.

  The ingress PFE performs the MAC address lookup; the destination MAC belongs to the switch so the PFE performs a L3 lookup.

  3.

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

  D. 1. The frame enters the ingress port and PFE.

  2.

  The ingress PFE performs the MAC address lookup, determines no match and replicates the frame to other PFEs and local ports on same broadcast domain.

  3.

  All other PFEs replicate the frame and forward those frames out all egress ports in the same broadcast domain.

  Correct Answer: D

• Question 212:

  What is the purpose of the forwarding routing instance type?

  A. to create multiple Layer 3 switches

  B. to create a virtual Layer 2 switch

  C. to forward Layer 3 VPN traffic

  D. to implement filter-based forwarding

  Correct Answer: D

• Question 213:

  Which command is used to confirm the status of a tunnel interface?

  A. show tunnel interface gr-0/0/0

  B. show tunnels

  C. show interfaces gr-0/0/0 detail

  D. show interfaces tunnel detail

  Correct Answer: C

• Question 214:

  Which two statements describe the behavior of Dynamic ARP Inspection? (Choose two.)

  A. Dynamic ARP Inspection is disabled by default.

  B. Dynamic ARP Inspection is enabled on individual ports.

  C. Dynamic ARP Inspection is enabled by default.

  D. Dynamic ARP Inspection is enabled on individual VLANs.

  Correct Answer: AD

• Question 215:

  Which statement is true regarding a unified in-service software upgrade (ISSU)?

  A. BFD must be enabled.

  B. GRES and NSR must be enabled.

  C. VRRP must be enabled.

  D. OAM must be enabled.

  Correct Answer: B

  Reference: JNCIS-ENT Routing Study Guide, High Availability ?Chapter 6?5

• Question 216:

  Which two prefixes contribute to the aggregate route 10.1.0.0/20? (Choose two.)

  A. 10.1.14.0

  B. 10.1.15.0

  C. 10.1.16.0

  D. 10.1.17.0

  Correct Answer: AB

• Question 217:

  Which statement is correct regarding access ports on EX Series switches?

  A. They are used for console management.

  B. They can only be connected to routers.

  C. They are used to establish a Virtual Chassis.

  D. They can receive untagged traffic.

  Correct Answer: D

  Reference:JNCIS-ENT Switching Study Guide, Chapter 2? ?Virtual Networks

• Question 218:

  You would like the network attached to the ge-0/0/1.0 interface to be advertised into OSPF, but you also want to prevent OSPF adjacencies from being formed on ge-0/0/1.0.

  Which command will satisfy this requirement?

  A. [edit protocols] user@R1# set ospf area 1 interface ge-0/0/1.0 passive

  B. [edit protocols] user@R1# set ospf area 1 interface ge-0/0/1.0 secondary

  C. [edit protocols] user@R1# set ospf area 1 interface ge-0/0/1.0 flood-reduction

  D. [edit protocols] user@R1# set ospf area 1 interface ge-0/0/1.0 disable

  Correct Answer: A

• Question 219:

  -- Exhibit ?

  

  -- Exhibit -

  Referring to the exhibit, if all four switches in the Virtual Chassis boot at the same time, which of the members will assume the master and the backup Routing Engine roles?

  A. Member 0 will be the master and Member 2 will be the backup based on the serial number.

  B. Member 2 will be the master and Member 0 will be the backup based on the serial number.

  C. Member 0 and Member 2 will participate in an election process to determine the master and the backup.

  D. The configuration is missing a priority statement to make the determination.

  Correct Answer: C

• Question 220:

  Which OSPF reference bandwidth setting would give a 1-Gbps link a metric of 10?

  A. 10

  B. 1000

  C. 10,000,000

  D. 10,000,000,000

  Correct Answer: D