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Service Provider Routing and Switching

Question No: 1 – (Topic 1)

What are two characteristics of L2 circuits? (Choose two.)

  1. Routing instance configuration is required for L2 circuits to function correctly.

  2. Routing instance configuration is not required for L2 circuits to function correctly.

  3. BGP is required for L2 circuits to function correctly.

  4. BGP is not required for L2 circuits to function correctly.

Answer: B,D

Question No: 2 – (Topic 1)

Click the Exhibit button

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RP1 and RP2 are acting as PIM-SM rendezvous points (Rps) in their autonomous system. Referring to the diagram, which purpose does the MSDP session between RP1 and RP2 serve?

  1. MSDP allows RPs in different PIM domains to advertise any active multicast receivers to each other

  2. MSDP allows RPs in different PIM domains to advertise any active multicast sources to each other.

  3. MSDP routes are used by an RP for reverse path forwarding lookups when multicast sources exist in different autonomous systems.

  4. MSDP allows RPs in different PIM domains to form PIM neighbor relationship with each other.

Answer: B

Question No: 3 – (Topic 1)

Click the Exhibit button

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Which configuration supports interprovider Layer 3 VPN option B on ASBR1 as shown in the exhibit.

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  1. Option A

  2. Option B

  3. Option C

  4. Option D

Answer: A

Question No: 4 – (Topic 1)

What are two characteristics of L3VPNs? (Choose two )

  1. Matching route targets are required for L3VPNs to function correctly.

  2. Multiprotocol BGP is required for L3VPNs to function correctly.

  3. The IPv4 NLRI is required for L3 VPNs to function correctly.

  4. Matching route distinguishes are required for L3VPNs to function correctly

Answer: A,D

Question No: 5 – (Topic 1)

You are asked to configure PIM-SM in your network. Your implementation must allow for load sharing between redundant RPs and, should an RP failure occur, the RP failover time should be minimized.

Which two configuration tasks are required in this scenario? (Choose two.)

  1. Configure MSDP peering sessions between the routers designated as RPs.

  2. Configure at least two static RPs and bundle them in an RP redundancygroup under [edit protocols pim].

  3. On the routers designated as RPs, configure the shared anycast address on the loopback interface

  4. Configure the shared anycast address on the RPs as the primary address on the loopback interface.

Answer: B,D

Question No: 6 – (Topic 1)

Click the Exhibit button

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You want to advertise routes 2.0.0.0/8 and 2.6.6.6/32 to BGP peer 192.168.11.0. Referring to the exhibit, which configuration change would satisfy this requirement?

  1. Delete the as1000 export policy.

  2. Change the as1000 policy to orlonger.

  3. Delete the reject export policy.

  4. Change the reject policy to longer.

Answer: B

Question No: 7 – (Topic 1)

During a network migration window, an engineer issues the set protocols ISIS overload timeout 1200 command. In this scenario, which effect does this have on the IS-IS operations of the router?

  1. After the first IS-IS adjacency forms, the overload bit is set for 1200 seconds

  2. When the IS-IS protocol starts, the overload bit is set after the timer of 1200 seconds expires

  3. When the IS-IS protocol starts, the overload bit is set for 1200 seconds.

  4. After the first IS-IS adjacency forms, the overload bit is set after the timer of 1200 seconds expires.

Answer: C

Question No: 8 – (Topic 1)

Which two statements are true about IS-IS adjacency formation? (Choose two.)

  1. Level 1 only routers never form an adjacency with Level 2 only routers

  2. Level 1 only routers always form an adjacency with Level 2 only routers

  3. For Level 1 adjacencies, area IDs must be the same

  4. For Level 2 adjacencies, area IDs must be the same.

Answer: A,C

Question No: 9 – (Topic 1)

Click the Exhibit button.

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Referring to the exhibit button, you are asked to ensure that traffic destined for the 5 5.5.0/24 network must use the LSP named Top Which two actions would you perform to accomplish this task*? (Choose two)

  1. Apply the policy as an import policy for BGP on R1

  2. Create a routing policy that matches the route 5.5.5.0/24 with an action of install- nexthop Isp Top.

  3. Create a routing policy that matches the route 5.5.5.0/24 with an action of next-hop Top.

  4. Apply the policy to the forwarding table on R1.

Answer: B,D

Question No: 10 – (Topic 1)

Packets traverse a Junos device configured for class of service. Which two statements are true in this scenario? (Choose two.)

  1. Packets are subject to traffic shapers before policers.

  2. Packets are subject to policers before traffic shapers.

  3. Packets are processed by behavior aggregate classifiers before multifield classifiers.

  4. Packets are processed by multifield classifier before behavior aggregate classifiers.

Answer: A,C

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