Juniper JN0-643 Online Practice Questions and Exam Preparation

Juniper JN0-643 Online Questions & Answers

• Question 51:

  In a PIM-SM network, which type of node helps to build a tree towards an unknown multicast source?

  A. DIS
  B. RP
  C. DR
  D. BSR
  A. DIS

• Question 52:

  You have been asked to implement a private VLAN with two community VLANs. This private VLAN will be confined to a single switch in your Layer 2 network. This private VLAN, along with other VLANs configured on the switch, will require gateway services provided through a connected router.

  Which statement about this deployment is true?

  A. All isolated ports must be configured as trunk ports.
  B. A minimum of one promiscuous trunk port is required.
  C. Both community VLANs must have an assigned VLAN IDs.
  D. A minimum of one private VLAN trunk port is required.
  B. A minimum of one promiscuous trunk port is required.

• Question 53:

  You are asked to set up 802.1X port authentication for all access ports on your EX Series switch. You must ensure that only one user is allowed to authenticate per port and all other attempts are denied.

  Which supplicant mode must be used?

  A. single mode
  B. single-secure mode
  C. default mode
  D. multiple mode
  B. single-secure mode

• Question 54:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  Referring to the exhibit, which answer is correct?

  A. R2 is the DR and R1 is the BDR.
  B. R4 is the DR and R2 is the BDR.
  C. R2 is the DR and R3 is the BDR.
  D. R3 is the DR and R2 is the BDR.
  C. R2 is the DR and R3 is the BDR.

• Question 55:

  You want to control bursts of HTTP traffic entering your SRX Series Gateway. To support varying requirements, interfaces ge-0/0/0 through ge-0/0/3 should each be rate-limited separately, using the same parameters. What is the correct way to meet these requirements?

  A. Configure a single policer and apply it directly on the appropriate interfaces.
  B. Configure four policers and apply each one directly on the appropriate interface.
  C. Configure a policer and reference it in a firewall filter that uses the interface-specific option; apply the filter to the appropriate interfaces.
  D. Configure four policers and reference them all in a firewall filter; apply the filter to the appropriate interfaces.
  C. Configure a policer and reference it in a firewall filter that uses the interface-specific option; apply the filter to the appropriate interfaces.

• Question 56:

  What are two OSPF LSA types? (Choose two)

  A. stub
  B. router
  C. transit
  D. network
  B. router
  D. network

• Question 57:

  -- Exhibit -

  Mar 16 18:39:15.800390 BGP RECV 172.14.10.2+57785 -> 172.14.10.1+179 Mar 16 18:39:15.800932 BGP RECV message type 1 (Open) length 59 Mar 16 18:39:15.800995 BGP RECV version 4 as 2 holdtime 90 id 192.168.5.1 parmlen 30 Mar 16 18:39:15.801064 BGP RECV MP capability AFI=2, SAFI=1 Mar 16 18:39:15.801112 BGP RECV Refresh capability, code=128 Mar 16 18:39:15.801172 BGP RECV Refresh capability, code=2 Mar 16 18:39:15.801224 BGP RECV Restart capability, code=64, time=120, flags= Mar 16 18:39:15.801289 BGP RECV 4 Byte AS-Path capability (65), as_num 2 Mar 16 18:39:15.801705 advertising receiving-speaker only capabilty to neighbor 172.14.10.2 (External AS 2) Mar 16 18:39:15.801787 bgp_senD. sending 59 bytes to 172.14.10.2 (External AS 2) Mar 16 18:39:15.801845 Mar 16 18:39:15.801845 BGP SEND 172.14.10.1+179 -> 172.14.10.2+57785 Mar 16 18:39:15.801933 BGP SEND message type 1 (Open) length 59 Mar 16 18:39:15.801991 BGP SEND version 4 as 1 holdtime 90 id 192.168.2.1 parmlen 30 Mar 16 18:39:15.802054 BGP SEND MP capability AFI=1, SAFI=1 Mar 16 18:39:15.802115 BGP SEND Refresh capability, code=128 Mar 16 18:39:15.802176 BGP SEND Refresh capability, code=2 Mar 16 18:39:15.802227 BGP SEND Restart capability, code=64, time=120, flags= Mar 16 18:39:15.802292 BGP SEND 4 Byte AS-Path capability (65), as_num 1 Mar 16 18:39:15.802615 bgp_process_caps: mismatch NLRI with 172.14.10.2 (External AS 2): peer: (16) us: (1) Mar 16 18:39:15.802763 bgp_process_caps:2561: NOTIFICATION sent to 172.14.10.2 (External AS 2): code 2 (Open Message Error) subcode 7 (unsupported capability) value 1 Mar 16 18:39:15.802913 bgp_senD. sending 23 bytes to 172.14.10.2 (External AS 2) Mar 16 18:39:15.802969 Mar 16 18:39:15.802969 BGP SEND 172.14.10.1+179 > 172.14.10.2+57785 Mar 16 18:39:15.803057 BGP SEND message type 3 (Notification) length 23 Mar 16 18:39:15.803113 BGP SEND Notification code 2 (Open Message Error) subcode 7 (unsupported capability) Mar 16 18:39:15.803179 BGP SEND Data (2 bytes): 00 01 -- Exhibit -- Click the Exhibit button.

  Looking at the traceoptions output in the exhibit, why is the BGP neighbor not in Established state?

  A. BGP refresh is not supported.
  B. There is a router ID mismatch.
  C. IPv6 is not supported on the local peer.
  D. The peer AS number is misconfigured.
  C. IPv6 is not supported on the local peer.

• Question 58:

  You must troubleshoot a CoS issue on an Ethernet interface which has been observed to drop packets in the best effort queue. You must determine whether the dropped packets are tail drops. Which CLI command output accomplishes this task?

  A. show class-of-service interface
  B. show interfaces queue
  C. show interfaces extensive
  D. show class-of-service forwarding-class best-effort
  B. show interfaces queue

• Question 59:

  Which two statements are correct about MSTP? (Choose two.)

  A. It allows you to preprovision VLAN IDs to spanning tree instances.
  B. It provides a more scalable solution than VSTP.
  C. It is not supported when using MVRP.
  D. It allows you to use VLAN groups to simplify configuration tasks when groups of VLANs use the same parameters.
  A. It allows you to preprovision VLAN IDs to spanning tree instances.
  B. It provides a more scalable solution than VSTP.

• Question 60:

  Which 802.1x supplicant mode allows multiple supplicants to be connected to a port one requires each device to authenticate separately?

  A. single
  B. smgle secure
  C. MAC RADIUS
  D. Multiple
  D. Multiple