Juniper JNCIS-ENT JN0-349 Questions & Answers

• Question 91:

  Which two statements about the root bridge election process are correct? (Choose two.)

  A. The highest root bridge priority is preferred over lower root bridge priorities.

  B. The highest root bridge identifier is preferred over lower root bridge identifiers.

  C. The lowest root bridge priority is preferred over higher root bridge priorities.

  D. The lowest root bridge identifier is preferred over higher root bridge identifiers.

  Correct Answer: CD

• Question 92:

  Click the Exhibit button.

  

  Referring to the exhibit, which statement is correct?

  A. R1 and R2 are elected as DROthers.

  B. R3 has the complete OSPF database.

  C. R3 and R4 have an adjacency state of Full.

  D. R4 is elected as the DR.

  Correct Answer: B

• Question 93:

  Click the Exhibit button.

  

  You are building a network and make some configuration changes. While trying to validate these changes, you receive the error shown in the exhibit.

  How would you solve this problem?

  A. You must create a new VLAN called all using the VLAN ID of 30.

  B. You must configure the ge-0/0/5.0 interface with family inet instead of family ethernet- switching.

  C. You must configure the port mode as trunk on the ge-0/0/5.0 interface.

  D. You must create two sub-interfaces on ge-0/0/5 with the appropriate VLAN member assigned to each.

  Correct Answer: C

• Question 94:

  Which statement is correct about the OSPF router ID (RID)?

  A. The OSPF RID must match for all routers in the same area.

  B. The OSPF RID for IPv6 is a 128-bit address.

  C. The OSPF RID for IPv4 is a 32-bit address.

  D. The OSPF RID is not necessary when BFD is implemented.

  Correct Answer: C

• Question 95:

  If an EX Series switch receives a frame with a known destination MAC address, what is the expected behavior?

  A. The frame is sent out all ports assigned to the associated VLAN except the ingress port on which the frame was received.

  B. The frame is sent out all ports assigned to all configured VLANs except the ingress port on which the frame was received.

  C. The frame is sent out all trunk ports associated with the ingress VLAN regardless of whether a matching MAC address was found in the bridge table.

  D. The frame is sent out the egress port with a matching destination MAC address within the bridge table associated with the ingress VLAN.

  Correct Answer: D

• Question 96:

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

  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

  Correct Answer: D

• Question 97:

  Which two statements are true about high availability on Junos devices? (Choose two.)

  A. BFD is faster at detecting failures than default GRE or OSPF timers.

  B. NSR is independent of helper routers to assist the routing platform in restoring routing protocol information.

  C. NSR is dependent on helper routers to assist the routing platform in restoring routing protocol information.

  D. BFD is slower at detecting failures than default GRE or OSPF timers.

  Correct Answer: AB

  Explanation: https://www.juniper.net/documentation/en_US/junos/topics/concept/nsr- overview.html

• Question 98:

  You are deploying a new switch configuration at a small branch using EX3400 Series switches. You are concerned about loop prevention.

  In this scenario, which configuration would you deploy?

  A. RSTP

  B. EVPN

  C. MPLS D. BPDU

  Correct Answer: A

• Question 99:

  Click the Exhibit button.

  

  You are responsible for managing a Layer 2 network using RSTP for loop prevention. You recently committed the configurations shown in the exhibit. Unfortunately, Switch-2 became the root bridge and you must ensure that Switch-1 becomes the root bridge, when available, for this RSTP topology.

  Referring to the exhibit, which configuration change should be performed?

  A. Configure the ge-0/0/1 and ge-0/0/8 interfaces on Switch-1 to have a priority of 255.

  B. Configure the system MAC on Switch-1 to be higher than the other two switches.

  C. Configure the bridge-priority on Switch-1 as 4k.

  D. Configure the ge-0/0/1 and ge-0/0/8 interfaces on Switch-1 to have a cost of 0.

  Correct Answer: D

• Question 100:

  Click the Exhibit button.

  

  Referring to the exhibit, Router 1 learns about Route X.

  Which statement is correct about Route X when using the default BGP advertisement rules?

  A. R1 will not advertise this route to any peers.

  B. R3 will not advertise this route to R4 or R5 without an explicit policy.

  C. R4 and R5 will not advertise this route to each other.

  D. R2 will not advertise this route to R3 without an explicit policy.

  Correct Answer: C