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2021 Sep JN0-660 actual exam
Q21. - (Topic 2)
Click the Exhibit button.
On your MX Series router, traffic using the critical scheduler is out of profile. All other data is currently in profile. Referring to the exhibit, which statement is correct?
A. The critical queue is serviced before the less-critical queue.
B. The critical queue is serviced after the left-over queue.
C. The critical queue is serviced before the data queue.
D. The critical queue is serviced before the voice queue.
Answer: B
Q22. - (Topic 3)
Refer to the exhibit.
You have implemented the IS-IS configuration shown in the exhibit. Which two statements are true? (Choose two.)
A. An IS-IS adjacency can establish on the fe-2/1/0.0 interface.
B. The SONET interface configuration allows the sharing of only Level 2 routes.
C. The fe-1/0/0.0 interface configuration allows sharing of Level 1 and Level 2 routes.
D. The fe-2/0/0.0 interface configuration allows advertising of its IP address into the LSPs.
Answer: C,D
Q23. - (Topic 3)
You are using the 224.2.0.0/16 multicast address range for SSM applications in your network. However, since you have deployed SSM in your network, SAP/SDP application communications have not been functioning properly. What must you do to allow the SSM and SAP/SDP applications to function properly?
A. Use the 232.0.0.0/3 address range for SAP/SDP applications.
B. Use the 232.0.0.0/B address range for SSM applications.
C. Use the 224.1.0.0/16 address range for SAP/SDP applications.
D. Use the 224.1.0.0/16 address range for SSM applications
Answer: B
Q24. - (Topic 1)
Which two statements correctly describe BGP operation? (Choose two.)
A. IBGP does not advertise routes learned from other IBGP neighbors.
B. IBGP advertises routes learned from other IBGP neighbors.
C. EBGP advertises routes learned from other IBGP or EBGP neighbors.
D. EBGP does not advertise routes learned from other EBGP neighbors.
Answer: A,C
Q25. - (Topic 2)
Which two statements are true when configuring OSPF authentication? (Choose two.)
A. An OSPF link can support both simple password and MD5 authentication at the same time.
B. An MD5 password requires a key ID.
C. You can configure multiple MD5 passwords simultaneously on the same link.
D. If the MD5 password negotiation fails, you can configure OSPF to automatically use a simple password as a backup.
Answer: B,C
Most up-to-date JN0-660 free question:
Q26. - (Topic 4)
Which two statements describe the benefits of using point-to-multipoint LSPs in an environment with MVPNs? (Choose two.)
A. Performance levels within the LSPs can be guaranteed, regardlessof the signaling protocol used.
B. A service provider network does not need to run PIM to support multicast routing.
C. Data replication can be done by downstream LSRs and not just by the ingress PE router.
D. Multicast traffic can be protected, regardlessof the signaling protocol used.
Answer: B,C
Q27. - (Topic 2)
You are adding nonforwarding route reflectors to your network. Which three actions ensure that VPN routes are advertised properly? (Choose three.)
A. Use rib-groups to add IGP routes to inet.3 and/or inet6.3 on the route reflectors.
B. Add MPLS LSPs between the route reflectors and their client routers.
C. Add the route reflectors to the same IGP domain as their clients.
D. Use rib-groups to add VPN routes to inet.0 and/or inet6.0 on the route reflectors.
E. Add a static default route to inet.3 and/or inet6.3 on the route reflectors.
Answer: A,B,E
Q28. - (Topic 2)
What does the Junos command advertise-inactive allow?
A. OSPF inactive routes to be advertised using BGP
B. inactive and hidden BGP routes to be redistributed into OSPF
C. the best BGP route to be re-advertised by BGP, even when it is not the best route
D. the second-best BGP route to be re-advertised by BGP, to back up the best BGP route
Answer: C
Q29. - (Topic 3)
You are setting up MPLS RSVP LSPs between R1 and R6 through your core network. You must ensure that R1 has redundant ERO paths. If the main path fails and moves traffic to a second path, it should not switch back to the original path automatically. Which two actions will accomplish these requirements? (Choose two.)
A. Create two secondary paths.
B. Create a primary path with a revert timer of 0 and create a secondary path.
C. Create two primary paths.
D. Create a primary path with the revert timer set to 255 and create a secondary path.
Answer: A,B
Q30. - (Topic 2)
Click the Exhibit button.
You are an employee of ISP A. You must not allow traffic between ISP B and ISP C to cross your network, but customers of ISP B and ISP C must be able to reach your customers. Referring to the exhibit, which two actions would do this? (Choose two.)
A. Use communities to identify and filter routes.
B. Use policy to filter routes on AS number.
C. Use origin code to identify and filter routes.
D. Use the well-known no-advertise community.
Answer: A,D