Juniper JN0-660 問題集

質問 1：
Click the Exhibit button.

A LDP Layer 2 circuit is shown for VPN A and VPN B.
LDP tunneling over RSVP is activated on P1 and P2. Referring to the exhibit, which statement is true about the LDP Layer 2 circuit?
A. LDP must be enabled on the loopback interfaces of PE1 and PE2.
B. Label stitching must be configured on P1 and P2 for end to end transport LSPs.
C. MAC learning is needed and using the inner VPN label between PE1 and PE2 for VPN A or VPN B.
D. Targeted LDP sessions are established between PE1, P1 and P2, PE2.
正解：A

質問 2：
Which neighbor state indicates that two BGP neighbors have full connectivity?
A. Open Confirm
B. Idle
C. Connect
D. Established
正解：D

質問 3：
Click the Exhibit button.

Given the drop profile in the exhibit, what is the drop probability when the buffer reaches 90% full?
A. 90%
B. 85%
C. 60%
D. 70%
正解：D

質問 4：
Click the Exhibit button.

Referring to the exhibit, which type of traffic protection mechanism is used for the LSP?
A. bypass
B. link-protection
C. node-link-protection
D. fast-reroute
正解：D

質問 5：
-- Exhibit - -- Exhibit -

Click the Exhibit button.
Referring to the VPLS network shown in the exhibit, you notice that only one of the two CE sites configured under the VPLS instance forms a connection to the remote site. The other site remains in a forwarding and learning mode.
How does PE1 determine which CE within the VPLS instance forms the connection to the remote site?
A. The site with a lower interface index value will form the connection.
B. The site with the lowest site ID will form the connection.
C. The site that first distributes the outgoing label to the remote site will form the connection.
D. The site with a higher interface index value will form the connection.
正解：B

質問 6：
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. Ingress PE replication can be reduced, because BGP VPLS supports P2MP LSPs.
B. Using BGP signaling improves scaling, because a full mesh of transport LSPs is not needed.
C. Configuration overhead is reduced when adding new sites or new VPNs.
D. MAC addresses are learned through BGP instead of LDP, which improves scaling.
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 7：
Click the Exhibit button.

As shown in the exhibit, you have an adaptive LSP that requires 85 Mbps. The LSP is configured with a primary path and a secondary path in standby mode. All connections in the MPLS network are Fast Ethernet. Which statement is correct?
A. The primary and secondary paths are in an up state and operational.
B. The primary path is in a down state and not operational.
C. The secondary path is in a down state and not operational.
D. The primary and secondary paths are in a down state and not operational.
正解：A