Juniper JN0-643 Online Practice Questions and Exam Preparation

Juniper JN0-643 Online Questions & Answers

• Question 81:

  The network is configured with IPv4 and IPv6 addressing. The network administrator does not want the overhead of managing OSPFv2 and 0SPFv3 for route advertisement. Which statement is true in this scenario?

  A. OSPFv2 can advertise IPv6 routes by using opaque LSAs
  B. OSPFv3 can advertise IPv4 routes by using route redistribution policies
  C. OSPFv2 and OSPFv3 must run on the network to advertise IPv6 and IPv4 routes
  D. OSPFv3 can advertise IPv4 routes by configuring protocol realms
  D. OSPFv3 can advertise IPv4 routes by configuring protocol realms

• Question 82:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  Referring to the exhibit, the RPT from R3 towards R2 is established.

  What happens if the multicast source connected to R1 starts sending multicast traffic towards R1?

  A. R1 encapsulates the multicast packets into a PIM register multicast packet.
  B. R1 encapsulates the multicast packets into PIM join unicast messages.
  C. R1 forwards the multicast packets on the (S,G) tree towards the RP.
  D. R1 tunnels the multicast packets in PIM register messages towards the RP.
  D. R1 tunnels the multicast packets in PIM register messages towards the RP.

• Question 83:

  Your company asks you to configure multicast routing on a Junos device. They tell you that the router at IP address 192.168.1.4 is the root of the shared multicast delivery tree. Which command allows you to configure the Junos device as a non-RP router for PIM?

  A. set protocols pim rp local family inet disable
  B. set protocols pim rp local address 192.168.1.4
  C. set protocols pim rp static address 192.168.1.4
  D. set protocols pim rp auto-rp announce
  C. set protocols pim rp static address 192.168.1.4

• Question 84:

  You are implementing PoE on your EX Series switch to provide power to your VoIP phones. You have a device that does not provide its class information to the switch. Which power class is assigned for this device?

  B. 2
  C. 4
  D. 6
  A

• Question 85:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  Your company has PIM running on some critical routers in your network, but another engineer has requested that you configure a PIM policy to prevent R2 from becoming a PIM neighbor of R1 by dropping the hello packets.

  Referring to the exhibit, which three commands are necessary for preventing R2 from becoming a PIM neighbor of R1? (Choose three.)

  A. set protocols pim interface ge-0/0/1.0 neighbor-policy block-pim
  B. set policy-options policy-statement block-pim term 1 from route-filter 227.2.2.2/32 exact
  C. set policy-options policy-statement block-pim term 1 from route-filter 10.10.10.2/32 exact
  D. set policy-options policy-statement block-pim term 1 then reject
  E. set policy-options policy-statement block-pim term 1 from route-filter 10.10.10.1/32 exact
  A. set protocols pim interface ge-0/0/1.0 neighbor-policy block-pim
  C. set policy-options policy-statement block-pim term 1 from route-filter 10.10.10.2/32 exact
  D. set policy-options policy-statement block-pim term 1 then reject

• Question 86:

  You must configure your access switch with more than 3000 VLANs and you want the ability to load- balance across them. Which spanning-tree approach has the least impact on control-plane performance?

  A. Configure your access switch with a load-balancing policy and apply it under [edit protocols rstp].
  B. Configure your access switch for Rapid-PVST+.
  C. Configure your access switch for MSTP, incorporating the use of MSTIs.
  D. Configure your access switch for both VSTP and RSTP.
  C. Configure your access switch for MSTP, incorporating the use of MSTIs.

• Question 87:

  You are configuring BGP peering with a neighboring AS. Multiple physical links exist between your edge router and the neighboring edge router, and you want a configuration that supports the highest degree of redundancy. How can you implement this scenario?

  A. Configure multiple peerings between the routers' physical interfaces.
  B. Use the multipath feature.
  C. Configure multiple peerings between the routers' logical interfaces.
  D. Use the multihop feature.
  D. Use the multihop feature.

• Question 88:

  A Layer 2 forwarding loop occurred on your network during a scheduled maintenance period. You must prevent this behavior in the future.

  Which protocol should you enable on the EX Series switch to address this condition in the future?

  A. DVMRP
  B. L2TPv3
  C. STP
  D. RSVP
  D. RSVP

• Question 89:

  Your company makes extensive use of VSTP in your network for loop protection. The network is at the VSTP VLAN limit and must protect additional VLANs.

  Which command allows you to protect additional VLANs?

  A. set protocols mstp interface all
  B. set protocols vstp vlan all
  C. set protocols vstp vlan-group
  D. set protocols rstp
  D. set protocols rstp

• Question 90:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  Given the topology in the exhibit, which two statements related to the Q-in-Q tunneling implementation are true? (Choose two.)

  A. The ge-0/0/0 interface on Provider Bridge A must be configured as an access port.
  B. The ge-0/0/0 interface on Provider Bridge A must be configured as a trunk port.
  C. Provider Bridge B will make forwarding decisions using a MAC table associated with VLAN ID 100.
  D. Provider Bridge B will make forwarding decisions using a MAC table associated with VLAN ID 200.
  A. The ge-0/0/0 interface on Provider Bridge A must be configured as an access port.
  D. Provider Bridge B will make forwarding decisions using a MAC table associated with VLAN ID 200.