Juniper JN0-643 Online Practice Questions and Exam Preparation

Juniper JN0-643 Online Questions & Answers

• Question 151:

  What are two benefits of configuring OSPF database protection? (Choose two.)

  A. Protects the LSDB from being flooded by excessive LSA flooding.
  B. Provides intra-area route filtering and route summarization.
  C. Allows the device to participate in OSPF routing but not be used for transit traffic.
  D. Limits the number of LSAs in the LSDB (excluding those generated by the local router).
  A. Protects the LSDB from being flooded by excessive LSA flooding.
  D. Limits the number of LSAs in the LSDB (excluding those generated by the local router).

• Question 152:

  A network administrator is configuring CoS on a switch and assigns forwarding classes call-sig and critical to the same queue number per the configuration below:

  class-of-service {

  forwarding-classes {

  class best-effort queue-num 0;

  class bulk-data queue-num 1;

  class critical queue-num 3;

  class voice queue-num 6;

  class call-sig queue-num 3;

  }

  }

  Based on the configuration, which option prioritizes call-sig traffic over critical traffic?

  A. Assign call-sig and critical to different schedulers.
  B. Assign call-sig and critical to different scheduler maps.
  C. Assign a loss priority of high to the packets in the critical forwarding class and configure drop profiles in the scheduler configuration.
  D. Assign a loss priority of high to the packets in the critical forwarding class and set priority high in the scheduler configuration.
  C. Assign a loss priority of high to the packets in the critical forwarding class and configure drop profiles in the scheduler configuration.

• Question 153:

  Your device receives the route 10.1.10/24 from all four of the destinations shown in the exhibit. In this scenario, which route would be active in the routing table?

  

  A. the route from 192.168.100.1
  B. the route from 172.16.4.2
  C. the route from 172.17.4.2
  D. the route from 192.168.100.2
  B. the route from 172.16.4.2

• Question 154:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  Referring to the configuration shown in the exhibit, which statement is true?

  A. RP2 stops sending all SA messages to its peer.
  B. RP1 stops sending all SA messages to its peer.
  C. RP2 stops sending SA messages for the group 224.7.7.7 from source 192.168.100.10 to RP1.
  D. RP1 stops sending SA messages for the group 224.7.7.7 from source 192.168.100.10 to RP2.
  C. RP2 stops sending SA messages for the group 224.7.7.7 from source 192.168.100.10 to RP1.

• Question 155:

  -- Exhibit -user@switch> show poe controller Controller Maximum Power Guard Management Status Lldp index power consumption band Priority 0 130.00W 121.00W 0W Class AT_MODE Disabled -- Exhibit -

  Click the Exhibit button.

  A new user's Class 3 IP phone is connected to port ge-0/0/7 on an EX Series switch; however, it is not working.

  Referring to the exhibit, what is the cause?

  A. The model of the EX Series switch being used supports PoE only on interfaces ge-0/0/0 through ge- 0/0/6.
  B. The PoE port is set to class 0.
  C. The port has been shut down because the phone's power requirements exceed the PoE power budget for the switch.
  D. The guard-band is insufficient.
  C. The port has been shut down because the phone's power requirements exceed the PoE power budget for the switch.

• Question 156:

  Which statement describes 802 1x supplicant single modes?

  A. 802 1x supplicant single mode permit access for the first supplicant, all other applicants that connect to the port are allowed full access without further authentication
  B. 802 1x supplicant single mode allows all supplicant to connect to the port,each supplicant is authenticated individually
  C. 802 1x supplicant single mode permits access for a single supplicant,all other supplicants attempting to connect through the same port are denied access
  D. 802 1x supplicant single mode allows only one supplicant to connect to the port,no other supplicant is allowed to connect until the first supplicant disconnects
  A. 802 1x supplicant single mode permit access for the first supplicant, all other applicants that connect to the port are allowed full access without further authentication

• Question 157:

  What are three types of PVLAN broadcast domains? (Choose three.)

  A. primary VLAN
  B. dynamic VLAN
  C. isolated VLAN
  D. community VLAN
  E. S-VLAN
  A. primary VLAN
  C. isolated VLAN
  D. community VLAN

• Question 158:

  -- Exhibit

  

  -- Exhibit -

  Click the Exhibit button.

  Referring to the exhibit, you are asked to ensure that CE1 can communicate with CE2 using VLAN 150.

  Which configuration meets this requirement on S1?

  A. user@S1# show customer-a { vlan-id 200; dot1q-tunneling { customer-vlans 150; } } {master:0}[edit vlans]
  B. user@S1# show customer-a { vlan-id 150; interface { ge-0/0/0.0; ge-0/0/1.0; } dot1q-tunneling { customer-vlans 200; } } {master:0}[edit vlans]
  C. user@S1# show customer-a { vlan-id 200; interface { ge-0/0/0.0; ge-0/0/1.0; } dot1q-tunneling { customer-vlans 150; } } {master:0}[edit vlans]
  D. user@S1# show customer-a { vlan-id 150; interface { ge-0/0/0.0; } } v200 { vlan-id 200; interface { ge-0/0/1.0; } }
  C. user@S1# show customer-a { vlan-id 200; interface { ge-0/0/0.0; ge-0/0/1.0; } dot1q-tunneling { customer-vlans 150; } } {master:0}[edit vlans]

• Question 159:

  Which AS path regular expression will match the AS path to AS 50 as shown in the exhibit?

  

  A. 20+30+40+50+
  B. 20 30*$
  C. 20 30 40 50
  D. 20|30|40|50
  C. 20 30 40 50

• Question 160:

  -- Exhibit -

  user@RP> show pim join extensive InstancE. PIM.master Family: INET R = Rendezvous Point Tree, S = Sparse, W = Wildcard

  Group: 224.1.1.1 SourcE. * RP: 192.168.1.1 Flags: sparse,rptree,wildcard Upstream interfacE. Local Upstream neighbor: Local Upstream statE. Local RP Downstream neighbors: InterfacE. so-0/0/0.0

  10.0.1.2 StatE. Join Flags: SRW Timeout: 176

  Group: 224.1.1.1 SourcE. 10.0.5.2 Flags: sparse,spt Upstream interfacE. unknown (no nexthop) Upstream neighbor: unknown Upstream statE. Local RP Keepalive timeout: 106 Downstream neighbors: InterfacE. so-0/0/0.0

  10.0.1.2 StatE. Join Flags: S Timeout: 176

  InstancE. PIM.master Family: INET6 R = Rendezvous Point Tree, S = Sparse, W = Wildcard -- Exhibit -

  Click the Exhibit button.

  The CLI output shown in the exhibit was taken from the RP in a PIM-SM network.

  Which statement explains the output shown in the exhibit?

  A. No tunnel PIC is installed on the RP router.
  B. 192.168.1.1 is not a local IP address on the RP router.
  C. Multicast traffic is arriving on the so-0/0/0.0 interface.
  D. The router does not have a unicast route to 10.0.5.2.
  D. The router does not have a unicast route to 10.0.5.2.