Juniper JN0-661 問題集

質問 1：
Click the Exhibit button.

user@R1> show ospf interface detail
Interface State Area DR ID BDR ID Nbrs
xe-0/0/1.0 BDR 0.0.0.0 2.169.37.12 11.244.245.215 1
Type LAN, address 192.161.27.11, Mask 255.255.255.248, MTU 4460, Cost 40 DR addr 192.161.37.12, BDR addr 192.168.37.11, Adj count 1, Priority 128 Hello 10, Dead 40, ReXmit 5, Not Stub fe-0/2/1.0 PtToPt 0.0.0.0 0.0.0.0 0.0.0.0 Type P2P, Address 0.0.0.0, Mask 0.0.0.0, MTU 1500, Cost 2604 Adj count 0 Hello 10, Dead 40, ReXmit 5, Not stub Auth type: MDS, Active key ID 3, Start time 2013 Jul 19 10:00:00 PST IPsec SA Name: sa user@R2> show ospf interface detail
Interface State Area DR ID BDR ID Nbrs
xe-1/1/1.0 BDR 0.0.0.0 192.168.37.12 11.244.245.216 1
Type LAN, address 192.161.27.12, Mask 255.255.255.248, MTU 4460, Cost 40 DR addr 192.161.37.12, BDR addr 192.168.37.11, Adj count 1, Priority 128 Hello 3, Dead 9, ReXmit 5, Not stub fe-2/2/2.0 PtToPt 0.0.0.0 0.0.0.0 0.0.0.0 Type P2P, address 0.0.0.0, Mask 0.0.0.0, MTU 1500, Cost 2604 Adj count 0 Hello 10, Dead 40, ReXmit 5, Not Stub Auth type: MDS, Active key ID 3, Start time 2013 Jul 19 10:00:00 PST IPsec SA Name: sa Which two statements are true about the OSPF adjacency displayed in the exhibit?
(Choose two.)
A. There is a mismatch in the poll interval parameter between routers R1 and R2.
B. There is a mismatch in the hold timer parameter between routers R1 and R2.
C. There is a mismatch in the hello interval parameter between routers R1 and R2.
D. There is a mismatch in the dead interval parameter between routers R1 and R2.
正解：C,D
解説: (Topexam メンバーにのみ表示されます)

質問 2：
Click the Exhibit button.

AS 100 is originating and sending EBGP routes to AS 200. AS 200 is acting as a transit provider and sending those routers to AS 300. AS 200 is using the confederation topology shown in the exhibit.
What will the AS path of AS 100's routes be when they are received on the AS 300 router?
A. ({65200 65100}) 100
B. (65200 65100) 100
C. 200 (65200 65100) 100
D. 200 100
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 3：
You are asked to provide redundancy to avoid a single point of failure for your route reflector cluster groups.
Which action will accomplish this task?
A. Configure two route reflectors for each route reflector cluster group.
B. Configure unique cluster IDs for each client within a route reflector cluster group.
C. Configure a full IBGP peer mesh between clients within the route reflector cluster group.
D. Configure the no-client-reflect parameter on the route reflector.
正解：A

質問 4：
How would you copy the BGP prefix 192.168.42.0/24 from VRF-A.inet.0 to VRF-B.inet.0?
A. Use a VRF export policy in VRF-A to copy the route from the source VRF to the destination VRF.
B. Use an import policy on the BGP neighbor configured with family inet-vpn to add a target community that VRF-B imports.
C. Use a VRF import policy on the destination VRF to match the desired prefix.
D. Use a RIB group policy to copy the route from the bgp.l3vpn.0 table to the VRF-B.inet.0 table.
正解：B

質問 5：
You have established an MSDP peering between multicast domains for your AS and a neighboring AS. You are concerned about unnecessary flooding or looping of source active messages between MSDP peers. Which MSDP mechanism is used to prevent this problem?
A. The receiving MSDP peer sends register-stop messages towards the originating RP that forwarded the SA messages.
B. The receiving MSDP peer performs a multicast RPF check to ensure that the SA messages are forwarded away from only the originating multicast source.
C. The receiving MSDP peer performs amulticast peer-RPF check to ensure that the SA messages are forwarded away from only the originating RP.
D. The receiving MSDP peer sends prune messages to all upstream neighbors to avoid receiving additional SA messages.
正解：C