2017 Oct. New JN0-643 Exam Dumps with PDF and VCE Free Updated Today! Following are some JN0-643 Questions:
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QUESTION 81
Which two statements are true about SSM implementations on Junos devices? (Choose two.)
A. There is no need for an RP.
B. The multicast receiver’s DR must have IGMPv3 enabled.
C. SSM traffic must use the 232/8 range.
D. ASM and SSM implementations can coexist in the same network.
Answer: AD
QUESTION 82
You are asked to allow a customer to tunnel STP BPDUs from Customer Switch1 to Customer Switch2 for VLAN 300 on S-VLAN v500. You have administrative access to SW1 and SW3, but not SW2.
Referring to the exhibit, which three configuration statements must be added to SW1 to allow ingress STP BPDUs on port ge-0/0/16 to pass to SW3 for VLAN 300 only? (Choose three.)
A. set vlans v500 vlan-id 500 interface ge-0/0/16.0 mapping 300 swap
B. set vlans v500 vlan-id 500 dot1q-tunneling layer2-protocol-tunneling stp
C. set vlans v500 vlan-id 500 interface ge-0/0/16.0 mapping 300 push
D. set ethernet-switching-options dot1q-tunneling ether-type 0x8100
E. set vlans v500 vlan-id 500 interface ge-0/0/20.0 mapping 300 push
Answer: BCD
QUESTION 83
Referring to the exhibit, a customer is receiving an error while committing the operation on the switch.
[edit protocols]
user@switch# commit
[edit protocols ]
‘mstp’
Another xSTP protocol is enabled
error : Another xSTP protocol is enabled
error: configuration check-out failed
What are two reasons for this problem? (Choose two.)
A. VSTP and RSTP are both configured.
B. MSTP and RSTP are both configured.
C. Only STP is configured.
D. MSTP and STP are both configured.
Answer: BD
QUESTION 84
a set of terms and conditions before
A. MSTI 1 and MSTI 2 are part of the same MSTP region.
B. The bridge priority value of the MSTI 2 is the same on SwitchA and SwitchB.
C. VLAN 30 and VLAN 40 are not configured on SwitchA.
D. VLAN 30 and VLAN 40 are not members of trunk link xe-0/0/0 on SwitchA.
Answer: CD
QUESTION 85
You are asked to implement a captive portal on your EX Series switches.
What are three required steps? (Choose three.)
A. You must create the captive portal login page.
B. You must ensure the Web service is turned on.
C. You must specify the interfaces participating in the captive portal.
D. You must create and apply an authentication profile.
E. You must create an authentication whitelist.
Answer: BCD
QUESTION 86
Referring to the exhibit, which statement is true?
Controller Maximum Power Guard Management Status Lldp
index power consumption band Priority
0 792.00W 603.50W 0W Class AT_MODE Disabled
A. The switch supports PoE+.
B. The switch is protected against spikes in power demand.
C. The switch supports a maximum power draw per PoE port of 15.4 watts.
D. The switch can manually assign priorities per interface.
Answer: A
QUESTION 87
You are configuring port ge-0/0/0 on an EX Series switch connected to an IP phone that does not support LLDP-MED.
Which three configuration statements do you need to accomplish this task? (Choose three.)
A. set interfaces ge-0/0/0 unit 0 family ethernet-switching native-vlan-id voice-vlan
B. set interfaces ge-0/0/0 unit 0 family ethernet-switching vlan members voice-vlan
C. set interfaces ge-0/0/0 unit 0 family ethernet-switching vlan members data-vlan
D. set interfaces ge-0/0/0 unit 0 family ethernet-switching native-vlan-id data-vlan
E. set interfaces ge-0/0/0 unit 0 family ethernet-switching port-mode trunk
Answer: BDE
QUESTION 88
You are configuring CoS classifiers and want to use both BA and MF classification. After applying the configuration, you realize that the classifiers have a conflict.
Which statement is true?
A. BA classification overrides MF classification.
B. MF classification overrides BA classification.
C. Neither classification method is applied.
D. Both classifications are applied randomly.
Answer: B
QUESTION 89
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
Answer: D
QUESTION 90
A user complains about connectivity problems from their IP address (10.1.1.87) to a server (10.65.1.100).
Which Junos command can help verify connectivity in the network?
A. mroute
B. traceoptions
C. ping
D. clear bgp neighbor
Answer: A
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