Juniper Juniper Certifications JN0-643 Questions & Answers

• Question 251:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  R4 receives BGP prefixes for AS 50 from both R2 and R3. You want to ensure that R4 chooses R3 as the preferred path to reach 50.50.50/24.

  Referring to the information shown in the exhibit, where would you apply a policy containing the parameter local-preference 110 to accomplish this task?

  A. on R3, as import from R1

  B. on R3, as export towards R4

  C. on R2, as import from R1

  D. on R2, as export towards R4

  Correct Answer: D

• Question 252:

  You want to provide reachability to your data center by advertising its subnet throughout your upstream peer AS. However, you do not want this prefix advertised any further. Which BGP community value would be used to meet this requirement?

  A. no-advertise

  B. no-export

  C. no-export-subconfed

  D. 65512 - 65535

  Correct Answer: B

• Question 253:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  Referring to the exhibit, you want router A to have an EBGP peering with router C. They are both connected through router B, which does not have BGP running, and has static routes configured.

  What must be configured in the EBGP peer groups on routers A and C to make this connection possible?

  A. MED

  B. multihop

  C. multipath

  D. next-hop

  Correct Answer: B

• Question 254:

  Which set of BGP attributes is preferred by the Junos OS?

  A. MED. 100 AS path: 50 50 50 Local preferencE. 50

  Origin: I

  B. MED. 50 AS path: 50 50 50 Local preferencE. 1 Origin: E

  C. MED. 100 AS path: 50 50 50 50 Local preferencE. 50 Origin: I

  D. MED. 50 AS path: 50 50 50 Local preferencE. 50 Origin: E

  Correct Answer: A

• Question 255:

  -- Exhibit -

  Click the Exhibit button.

  Referring to the exhibit and based on the output below from Sw-1 and Sw-2, which statement is true?

  Sw-1> show spanning-tree mstp configuration MSTP information Context identifier : 0 Region name : juniper Revision : 1 Configuration digest : 0x9357ebb7a8d74dd5fef4f2bab50531aa

  MSTI Member VLANs 0 0-9,11-19,21-4094 1 10 2 20

  Sw-2# run show spanning-tree mstp configuration MSTP information Context identifier : 0 Region name : juniper Revision : 1 Configuration digest : 0x387b5f2ea2394b14e091f0921ee7b9a8

  MSTI Member VLANs 0 0-9,11-14,16-19,21-4094 1 10,15 2 20

  A. There will be only one MSTI 2 root bridge.

  B. There will be only one CST root bridge.

  C. Sw-1 and Sw-2 are in different MSTP regions.

  D. There will be only one CIST root bridge.

  Correct Answer: C

• Question 256:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  Referring to the exhibit, R2 is sending a route to R1 with a community value.

  Which statement is correct?

  A. Routes will be accepted without change in the attributes.

  B. All routes will be rejected.

  C. Routes will be accepted with the community value removed.

  D. Routes will be rejected with the community value removed.

  Correct Answer: C

• Question 257:

  -- Exhibit -

  

  -- Exhibit -Click the Exhibit button.

  Referring to the exhibit, you must ensure that traffic to the 2001:10:5::/64 network leaves AS 2 through R3.

  Given that all BGP attributes are at their default, how would you accomplish this task?

  A. On R1, configure a MED of 50 for the 2001:10:5::/64 route.

  B. On R2, configure a MED of 50 for the 2001:10:5::/64 route.

  C. On R3, configure a MED of 50 for the 2001:10:5::/64 route.

  D. On R4, configure a MED of 50 for the 2001:10:5::/64 route.

  Correct Answer: B

• Question 258:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  On AS1, which two attributes are used to influence inbound traffic from the other ASs shown in the exhibit? (Choose two.)

  A. AS path

  B. MED

  C. local preference

  D. origin

  Correct Answer: AD

• Question 259:

  -- Exhibit -user@router> show route protocol bgp detail

  inet6.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden) 4444:4444::/32 (1 entry, 1 announced) *BGP PreferencE. 170/-101 Next hop typE. Router, Next hop index: Address: 0x934c688 Next-hop reference count: 2 SourcE. 172.27.0.5 Next hop: ::172.27.0.5 via ge-0/0/1.0, selected StatE. Local AS: 3 Peer AS: 701 AgE. 3:22 Task: BGP_701.172.27.0.5+52965 Announcement bits (1): 0-KRT AS path: 701 4 I Aggregator: 4 10.255.1.34 Accepted LocalpreF. 100 Router ID. 10.255.1.31

  -- Exhibit -

  Click the Exhibit button.

  Referring to the exhibit, which two statements are true? (Choose two.)

  A. The IPv6 route was learned from an IPv6 BGP neighbor.

  B. The IPv6 route was learned from an IPv4 BGP neighbor.

  C. The IPv6 destination will use IPv4 as the next hop.

  D. The IPv6 destination will use IPv6 as the next hop.

  Correct Answer: BD

• Question 260:

  -- Exhibit -user@router# run show route receive-protocol bgp 192.168.4.101 detail

  inet.0: 18 destinations, 20 routes (18 active, 0 holddown, 0 hidden)

  *

  10.16.1.0/24 (1 entry, 1 announced) Accepted Nexthop: 192.168.4.101 LocalpreF. 100 AS path: 123 111 I

  *

  10.16.2.0/24 (1 entry, 1 announced) Accepted Nexthop: 192.168.4.101 LocalpreF. 100 AS path: 123 222 312 I

  *

  10.16.3.0/24 (1 entry, 1 announced) Accepted Nexthop: 192.168.4.101 LocalpreF. 100 AS path: 123 231 222 I

  *

  10.16.4.0/24 (1 entry, 1 announced) Accepted Nexthop: 192.168.4.101 LocalpreF. 100 AS path: 123 333 111 I -- Exhibit -

  Click the Exhibit button.

  Referring to the exhibit, which AS path regular expression will match only the 10.16.1.0/24 and 10.16.2.0/24 routes?

  A. .* (222|111) .*

  B. .+ (222|111) .*

  C. .(222|111) .*

  D. . (.222|.111) .*

  Correct Answer: C