Juniper JN0-643 Online Practice Questions and Exam Preparation

Juniper JN0-643 Online Questions & Answers

• Question 171:

  Which three statements are correct about source specific multicast (SSM) on the junos OS? (Choose three)

  A. SSM requires the use of an RP.
  B. IT HAS AN DEDICATED address block.
  C. SSM does not require the use of an RP.
  D. SSM must use the232/8 address range.
  E. IGMPv2 and IGMPv3 can be used with SSM.
  B. IT HAS AN DEDICATED address block.
  C. SSM does not require the use of an RP.
  E. IGMPv2 and IGMPv3 can be used with SSM.

• Question 172:

  Which two statements are true about MSDP mesh groups? (Choose two.)

  A. The MSDP mesh group was originally designed to limit SA flooding.
  B. SA messages received from a mesh group member flood these messages to all peers that are not members of this mesh group.
  C. SA messages received from a peer not in any mesh group do not flood to all peers.
  D. SA messages received from a peer not in any mesh group perform a peer-RPF check and, if successful, flood to all peers (except the advertising router).
  A. The MSDP mesh group was originally designed to limit SA flooding.
  B. SA messages received from a mesh group member flood these messages to all peers that are not members of this mesh group.

• Question 173:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  Referring to the exhibit, the RPs are set up for anycast. Multicast traffic is currently flowing from the source to the receivers. Which statement is true when RP2 goes down?

  A. Multicast traffic is interrupted for receiver 2 until RP2 recovers.
  B. Receiver 2 needs to rejoin RP1.
  C. Multicast traffic flows uninterrupted.
  D. RP1 starts sending multicast traffic to receiver 2.
  C. Multicast traffic flows uninterrupted.

• Question 174:

  A packet enters the router and is subject to ingress's processing. In which order is the packet processed?

  A. Policer >BA classifier>multifield classifier>forwarding policy
  B. multifield classifier>BA classifier>policer>forwarding policy
  C. BA classifier>multifieldclaasssifier>policer>forwarding policy
  D. forwarding policy> BA classifier>multifield classifier>policer
  C. BA classifier>multifieldclaasssifier>policer>forwarding policy

• Question 175:

  A company is deploying a new 802.1X port-based security infrastructure to allow users to access resources through wired Ethernet ports. However they recently deployed an RSA token-based system for users to connect remotely. The network administrator wants to reuse the same security database for 802.1X port-based security.

  Which 802.1X authentication protocol is required?

  A. EAP-TLS
  B. LAN-PEAP
  C. RSA-EAP
  D. EAP-TTLS
  D. EAP-TTLS

• Question 176:

  Which AS path regular expression matches only routes originated in your AS?

  A. "6573.*"
  B. ".*"
  C. "{"
  D. "^$"
  D. "^$"

• Question 177:

  -- Exhibit

  

  -- Exhibit -

  Click the Exhibit button.

  Traffic flows through your network, as shown in the exhibit. You have configured a rewrite rule on R1 to mark HTTP traffic with a specific DSCP value.

  What must you do to ensure that the HTTP traffic preserves its DSCP value as it leaves your CoS domain?

  A. Use behavior aggregate classifiers mapping the HTTP traffic to the specific DSCP value on R1 and R2.
  B. Use rewrite rules mapping the HTTP traffic to the specific DSCP value on R2 and R3.
  C. Use a rewrite rule mapping the HTTP traffic to the specific DSCP value on R3.
  D. Use the default settings already in place on the device.
  D. Use the default settings already in place on the device.

• Question 178:

  -- Exhibit

  

  -- Exhibit -

  Click the Exhibit button.

  ISP-A is advertising the 200.0.3.0/24 route to R1. R1 is advertising this BGP route to R2 but the route is hidden on R2.

  Referring to the exhibit, which statement is correct about the 200.0.3.0/24 route?

  A. The route is unusable because the next hop is not reachable from R2.
  B. The route is unusable because it has not been verified.
  C. The route is hidden because R1 is changing the next hop to 192.168.16.1.
  D. The route is hidden because R2 has a more preferred route.
  A. The route is unusable because the next hop is not reachable from R2.

• Question 179:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  As shown in the exhibit, a legacy IP phone is attached to Switch-1. The phone does not support LLDP- MED, but does allow configuration using DHCP. Existing network CoS policies dictate that VoIP traffic must use VLAN 10.

  Which two actions put VoIP traffic onto VLAN 10? (Choose two.)

  A. Configure protocols cdp on Switch-1.
  B. Manually configure the voice VLAN on the IP phone.
  C. Configure vlan 1 under forwarding-options bootp.
  D. Configure interface ge-0/0/5 under forwarding-options bootp.
  B. Manually configure the voice VLAN on the IP phone.
  D. Configure interface ge-0/0/5 under forwarding-options bootp.

• Question 180:

  -- Exhibit

  

  -- Exhibit -

  Click the Exhibit button.

  You are asked to connect Area 2 to the backbone.

  Which configuration would be required on R3?

  A. [edit protocols ospf3] user@R3# show area 0.0.0.0 { virtual-link neighbor-id 10.0.10.1 transit-area 0.0.0.1; interface ge-0/0/5.0; }
  B. [edit protocols ospf] user@R3# show area 0.0.0.0 { virtual-link neighbor-id 192.168.1.2 transit-area 0.0.0.1; interface ge-0/0/5.0 { interface-type p2p; } }
  C. [edit protocols ospf3] user@R3# show area 0.0.0.0 { virtual-link neighbor-id 192.168.1.2 transit-area 0.0.0.1; interface ge-0/0/5.0; }
  D. [edit protocols ospf3] user@R3# show area 0.0.0.1 { virtual-link neighbor-id 192.168.1.2 transit-area 0.0.0.1; interface ge-0/0/5.0; }
  C. [edit protocols ospf3] user@R3# show area 0.0.0.0 { virtual-link neighbor-id 192.168.1.2 transit-area 0.0.0.1; interface ge-0/0/5.0; }