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2021 Oct JN0-660 test
Q51. - (Topic 1)
What is a limitation of LDP?
A. Traffic must follow explicitly configured paths.
B. It requires a full mesh of LSPs throughout the network.
C. It requires a traffic engineering database (TED).
D. It does not support traffic engineering.
Answer: D
Q52. - (Topic 2)
Junos scripts can be written in which two languages? (Choose two.)
A. XLS
B. XML
C. XSLT
D. SLAX
Answer: C,D
Q53. - (Topic 2)
Click the Exhibit button.
In the exhibit, R2 and R3 are both rendezvous points. Assume that R2 fails. Which RP redundancy method could converge the multicast stream and RP as quickly as the IGP?
A. BSR without the use of MSDP
B. Anycast RP and MSDP
C. Auto-RP in combination with MSDP
D. Auto-RP without using MSDP
Answer: B
Q54. - (Topic 2)
Click the Exhibit button.
On your MX Series router, traffic using the voice scheduler has exceeded its transmit rate. All other data is currently in profile. Referring to the exhibit, which statement is correct?
A. The voice queue is serviced later than the less-critical queue.
B. The voice queue is serviced later than the left-over queue.
C. The voice queue is serviced before the critical queue.
D. The voice queue is serviced after data queue.
Answer: C
Q55. - (Topic 1)
Click the Exhibit button.
In the exhibit, R1 is a route reflector and R2 through R5 are clients in a full mesh configuration. R2 should only receive one copy of all routes sent from R5.Which configuration is valid?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: C
Improved JN0-660 test question:
Q56. - (Topic 4)
Refer to the exhibit.
You are implementing a Layer 3 VPN between Site 1 and Site 2. You notice that you are not sharing routes between PE1 and PE2. You have verified that MPLS and RSVP are functioning correctly. Referring to the exhibit, what is causing the problem?
A. The multihop feature is not enableD.
B. The next hop for the VPN routes is unusable.
C. The Layer 3 VPN NLRI has not been enabled on PE1.
D. The PE2 BGP session is restarting.
Answer: C
Q57. - (Topic 1)
You are facing BGP scaling issues and decide to add dedicated route reflectors to your network. You notice that VPN routes are not being advertised by your route reflectors. Which three actions can you take to solve this? (Choose three.)
A. Add a static default route to inet.3 and/or inet6.3 on the route reflectors.
B. Add a full mesh of MPLS LSPs between all of the route reflectors.
C. Add MPLS LSPs between the route reflectors and their client routers.
D. Add a static default route to inet.3 and/or inet6.3 on all of the client routers.
E. Use rib-groups to add IGP routes to inet.3 and/or inet6.3 on the route reflectors.
Answer: A,C,E
Q58. - (Topic 1)
Click the Exhibit button.
Based on the output shown in the exhibit, which statement is correct?
A. R3 is the designated intermediate system.
B. R3 is the backup designated intermediate system.
C. R3 has been configured with an export policy and is announcing external routes to IS-IS neighbors.
D. R3 is using both IPv4 and IPv6 resulting in two pseudonodes.
Answer: A
Q59. - (Topic 2)
Click the Exhibit button.
You are the administrator of AS 65000. There are four links between your network (AS 65000) and your upstream provider (AS 65001). You have an import policy on all of your routers. The routing table on the customer router has four routes to the Web server as follows:
Router A: Local Pref 110, IGP Cost 1000 Router B: Local Pref 100, IGP Cost 200 Router C: Local Pref 110, IGP Cost 900 Router D: Local Pref 100, IGP Cost 1000
Through which link will traffic to the Web server leave your network (AS 65000) from the customer router?
A. Router A
B. Router B
C. Router C
D. Router D
Answer: C
Q60. - (Topic 4)
Which authentication method secures IS-IS hello, link-state, and sequence number PDUs?
A. Level authentication
B. Interface authentication
C. Area authentication
D. Domain authentication
Answer: A