Juniper JN0-643 Online Practice Questions and Exam Preparation

Juniper JN0-643 Online Questions & Answers

• Question 101:

  You must configure a multifield classifier on ge-1/0/0. This classifier must match only TCP traffic from port number 79, set the loss priority to high, and classify the traffic as expedited- forwarding. The inbound traffic has no previous CoS markings.

  Which configuration meets these requirements?

  A. [edit firewall] user@switch# show filter ef_classifier_mf term 1 { from { protocol tcp; destination-port 79; } then { loss-priority high; forwarding-class expedited-forwarding; } [...] }
  B. [edit firewall] user@switch# show filter ef_classifier_mf term 1 { from { protocol tcp; source-port 79; } then { loss-priority high; forwarding-class expedited-forwarding; } [...] }
  C. [edit firewall] user@switch# show filter ef_classifier_mf term 1 { from { protocol tcp; destination-port 79; } then { loss-priority low; forwarding-class expedited-forwarding; } [...] }
  D. [edit firewall] user@switch# show filter ef_classifier_mf term 1 { from { protocol tcp; source-port 79; dscp ef; } then { loss-priority high; accept; } [...] }
  B. [edit firewall] user@switch# show filter ef_classifier_mf term 1 { from { protocol tcp; source-port 79; } then { loss-priority high; forwarding-class expedited-forwarding; } [...] }

• Question 102:

  -- Exhibit -user@router>show route advertising-protocol bgp 172.16.36.1 inet.0: 31 destinations, 31 routes (31 active, 0 holddown, 0 hidden) Prefix Nexthop MED Lclpref ASpath

  *

  10.200.17.0/24 Self I

  *

  10.200.19.0/24 Self I -- Exhibit -

  Click the Exhibit button.

  Referring to the exhibit, which three actions would summarize these routes to a BGP peer? (Choose three.)

  A. Create a policy that accepts the more specific contributing routes.
  B. Create a route to 10.200.16.0/21 with a next hop of 172.16.36.1 under the [edit routing- options static] hierarchy.
  C. Create a policy that rejects the more specific contributing routes.
  D. Create a policy to accept aggregate routes.
  E. Create a 10.200.16.0/22 route under the [edit routing-options aggregate] hierarchy.
  C. Create a policy that rejects the more specific contributing routes.
  D. Create a policy to accept aggregate routes.
  E. Create a 10.200.16.0/22 route under the [edit routing-options aggregate] hierarchy.

• Question 103:

  On your EX Series switch you must configure a delay buffer for the best effort queue scheduler named BE- sch which restricts the buffer usage to only 25 percent of the available buffer size. Which configuration statement will accomplish this task?

  A. [edit class-of-service schedulers BE-sch] user@switch# set buffer-size buffer-size temporal 25
  B. [edit class-of-service schedulers BE-sch] user@switch# set buffer-size buffer-size temporal 25 exact
  C. [edit class-of-service schedulers BE-sch] user@switch# set buffer-size percent 25
  D. [edit class-of-service schedulers BE-sch] user@switch# set buffer-size exact percent 25
  D. [edit class-of-service schedulers BE-sch] user@switch# set buffer-size exact percent 25

• Question 104:

  The network administrator wants the ports on an EX series switch to allow both tagged and untagged frames to be forwarded. Tagged frames should be associated with their tagged VLAN, while untagged frames should be associated with a preconfigured VLAN. In this scenario, which statement is true?

  A. The interface port mode should be configured as mixed mode to allow both trunk and access port modes, untagged frames will belong to the default VLAN configured on that post.
  B. An interface can be configured as an access port or a trunk port, but it cannot accept both tagged and untagged frames.
  C. The interface port mode should be configured as an access port with a VLAN ID, frames tflSrenter the port with a VLAN tag already assigned will override the access port vlan id.
  D. The interface port mode should be configured as a trunk port, untagged fra^^swill belong to the native Vlan id configured on that port.
  D. The interface port mode should be configured as a trunk port, untagged fra^^swill belong to the native Vlan id configured on that port.

• Question 105:

  Which three attributes must a BGP update contain? (Choose three.)

  A. next-hop
  B. MED
  C. origin
  D. AS-path
  E. local preference
  A. next-hop
  C. origin
  D. AS-path

• Question 106:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  In the exhibit, R5 is receiving five 200.1.1.x routes from the RIP router, and is advertising them into Area 1 using an export policy. You do not want any of the RIP routes to be in the routing table of R1.

  Which two solutions meet this requirement? (Choose two.)

  A. On R1, configure an export policy to reject the routes.
  B. On R1, configure an import policy to reject the routes.
  C. On R1, configure each address as a martian route.
  D. On R1, configure the no-nssa-abr option.
  B. On R1, configure an import policy to reject the routes.
  C. On R1, configure each address as a martian route.

• Question 107:

  Which version of BGP would an enterprise use to peer with an ISP?

  A. Confederation BGP
  B. External BGP
  C. Internal BGP
  D. Labeled-Unicast
  C. Internal BGP

• Question 108:

  You have certainly implemented the configuration shown in the exhibit. After committing these changes, the community devices connected to AS-1 are not able to communicate with the appropriate community devices connected to AS-2. What must be done to allow these community devices to communicate?

  

  A. You must configure an isolation VLAN ID Under the pvlan-200 on the AS2 switches
  B. You must configure the ge-0/0/10 interface on AS1 AS THE VPLAN on both switches
  C. You must configure an isolation VLAN ID under the VLAN 200 ON both switches
  D. You must configure the ge-0/012 interface on both switches as P VLAN trunks
  D. You must configure the ge-0/012 interface on both switches as P VLAN trunks

• Question 109:

  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
  B. no-export

• Question 110:

  You are setting up a new switch in your network that is using MSTP. You want to make sure that any port connected to a host starts forwarding traffic immediately. How can you meet this requirement?

  A. Configure the interfaces as point-to-point.
  B. Configure the interfaces as edge.
  C. Configure the forward-delay option as zero.
  D. Configure the interfaces as shared.
  B. Configure the interfaces as edge.