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2021 Oct JN0-660 testing engine

Q31.  - (Topic 2)

Click the Exhibit button.


Customer A is complaining that routes advertised from the CE2 router are not being received on the CE1 router. The physical topology of the network is CE1-PE1-PE2-CE2. The CE1-PE1 subnet is 172.16.1.0/24. The CE2-PE2 subnet is 172.16.2.0/24. PE1's loopback is 192.168.3.1 and PE2's loopback is 192.168.4.1.Referring to the output in the exhibit, what is the problem?

A. No LSP exists between PE1 and PE2.

B. Route targets are not properly configured.

C. as-override is not configured in the VRFs.

D. family inet-vpn is not configured on the PEs.

Answer: B


Q32.  - (Topic 3)

You are asked to configure auto-RP as part of a new PIM sparse mode deployment in your network.

Which two configuration tasks are required? (Choose two.)

A. Configure MSDP peering sessions between all RP candidates.

B. Configure PIM sparse-dense mode on all interfaces.

C. Configure IGMP version 2 on all routers.

D. Configure the appropriate auto-RP role on all routers.

Answer: B,D


Q33.  - (Topic 2)

Click the Exhibit button.


Using the configuration and topology in the exhibit, which statement is true?

A. Each LSR randomly selects the physical path to reach the loose hop R5 for the LSP.

B. Each LSR uses the IGP to select the physical path to reach the loose hop on R5 for the LSP.

C. Each LSR selects the lowest next-hop IP address to reach the loose hop on R5 for the LSP.

D. Each LSR selects the highest next-hop IP address to reach the loose hop on R5 for the LSP.

Answer: B


Q34.  - (Topic 4)

You are asked to implement an LDP-signaled VPLS network for a new customer. Which two statements are correct regarding this implementation? (Choose two.)

A. A full mesh of LDP sessions between PEs must be configured.

B. The PE routers distribute VPLS to label mapping using MP-IBGP.

C. The same NLRI as Layer 2 VPNs is used.

D. The PE router advertises a label for each remote PE configured.

Answer: A,D


Q35.  - (Topic 4)

Given the following regular expression:

.* 14203+(21870110458)

Which two AS paths match? (Choose two.)

A. 27522 2187010458

B. 27522 14203 14203 14203 21870

C. 14203 21780 10458

D. 14203 21780 27522

Answer: B,C


Up to the immediate present JN0-660 free exam questions:

Q36.  - (Topic 2)

Which two configuration parameters are required to configure an LDP-signaled VPLS service? (Choose two.)

A. vpls-id

B. site-identifier

C. route-distinguisher

D. instance-type vpls

Answer: A,D


Q37.  - (Topic 1)

Click the Exhibit button.

Your IT manager asks you to describe a benefit of migrating from LDP VPLS towards BGP VPLS considering the operational network shown in the exhibit. What can you tell your manager?

A. Using BGP signaling improves scaling, because a full mesh of transport LSPs is not needed.

B. MAC addresses are learned through BGP instead of LDP, which improves scaling.

C. Ingress PE replication can be reduced, because BGP VPLS supports P2MP LSPs.

D. Configuration overhead is reduced when adding new sites or new VPNs.

Answer: D


Q38.  - (Topic 2)

Click the Exhibit button.


Referring to the exhibit, Customer A is complaining that no OSPF routes are being received across your Layer 3 VPN. You suspect that a problem exists with the PE-CE protocol. The core network is operational. Which operational command on PE1 helps troubleshoot this problem?

A. show ospf neighbor

B. show bgp summary

C. show ospf neighbor instance customer-a

D. show bgp summary instance customer-a

Answer: C


Q39.  - (Topic 1)

You manage an MPLS network where the PE devices consist of multiple vendors. You are asked to conceal the MPLS topology for all LSPs. Which global configuration parameter will accomplish this?

A. Configure no-decrement-ttl on the ingress router only.

B. Configure no-propagate-ttl on the ingress router only.

C. Configure no-decrement-ttl on all routers within the MPLS network.

D. Configure no-propagate-ttl on all routers within the MPLS network.

Answer: D


Q40.  - (Topic 3)

Refer to the exhibit.


You have configured your Junos device to tag routes; however, you are not seeing the routes being tagged. What is causing the problem?

A. You must configure the tagging on the physical interfaces, not on the loopback.

B. Route tagging does not work when IS-IS traffic engineering is disabled.

C. You must import the policy into IS-IS, not export it.

D. The policy-statement should have only a then tag 200; the acceptis accepting the route and ignoring the tag.

Answer: B