Juniper Juniper Certifications JN0-643 Questions & Answers

• Question 31:

  When traffic is classified on an EX Series switch, which statement is true?

  A. With the default classifier rules applied, voice and video traffic receive their own queues to avoid congestion

  B. With the default classifier, rules applied all traffic that enters an access port is classified as best effort

  C. With the default classifier rules applied, voice traffic is classified as expedited forwarding on trunk ports

  D. If no classifier rules are applied, class of service bits are automatically rewritten on egress to match the class of service assigned on ingress

  Correct Answer: B

• Question 32:

  A customer wants to connect computer and IP telephone equipment to a switch using the same port. LLDP-MED has been turned onto discover VoIP equipment. Which two statements are true in this scenario? (Choose two)

  A. the switch will identify voice traffic automatically based on the source MAC address

  B. the access port can be configured to accept both tagged voice traffic and untagged data traffic

  C. the computer and VOIP equipment must be in the same VLAN on an access port

  D. the switch can send configuration information to the IP phone to assign it a VLAN automatically

  Correct Answer: BD

• Question 33:

  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.

  Correct Answer: BCE

• Question 34:

  When configuring class of service. What would you use to allocate bandwidth to a forwarding class?

  A. buffer depth

  B. transmit rate

  C. bandwidth

  D. speed

  Correct Answer: B

• Question 35:

  When servicing queues on an EX series switch, which two statements are true? (Choose two)

  A. By default, the class-of-service bits on a packet do not change on egress, regardless of which queue services the packet.

  B. By default, the four primary queues of best effort, assured forwarding expedited forwarding and network control have resources assigned to them.

  C. By default, only the best effort and network-control queues have resources assigned to them.

  D. WHEN TRAFFIC is assigned to user defined queues the best effort queue resources are automatically divided evenly among all user's configured queues to ensure all traffic get serviced.

  Correct Answer: AC

• Question 36:

  You configured IPv6 statics routes on the juniper routes and you want to OSPF to propagate these routes throughout your network. Which set of commands will accomplish these tracks?

  A. Set policy-options statement exportatatic term IPV6 static from protocol ospf Set policy options statement exportatatic term IPV6 static than accept Set protocols ospf3 export exportstatic

  B. set policy options statement exportatic term IPV6 static from protocol ospf Set policy options statement exportatic term IPV6 static than accept Set protocols ospf export exportstatic portexportstat

  C. set policy options statement exportstatic term IPV6 static from protocol static Set policy options statement exportstatic term IPV6 static than accept Set protocol ospf export exportstatic

  D. set policy options statement exportstatic term IPV6 static from protocol statie Set policy options statement exportstatic term IPV6 than accept Set protocol ospf3 export exportstatic

  Correct Answer: D

• Question 37:

  Referring to the exhibit, what is the probability of the traffic being dropped if interface reaches 85% OF ITS bandwidth capacity?

  

  A. 90%

  B. 95%

  C. 60%

  D. 80%

  Correct Answer: C

• Question 38:

  You are designing a new enterprise network using EX switches. You are asked to u management. In this scenario which two statements are correct? (Choose two)

  A. MVRP can only be enable on trunk ports

  B. Locally defined VLANS must be manually assigned to trunk ports

  C. PDU update timers are evaluated on a per interface basis

  D. MVRP supports all spanning tree versions

  Correct Answer: AC

• Question 39:

  What are two OSPF LSA types? (Choose two)

  A. stub

  B. router

  C. transit

  D. network

  Correct Answer: BD

• Question 40:

  When using port authentication on a juniper switch, which two statements are true? (Choose two)

  A. the switch can be configured to allow 802.1x authenticating and MAC based radius authenticated on the same port at the same time

  B. the switch can allow 802.1x authentication and MAC based authentication, but cannot do both on the samepoint

  C. End clients must have an 802.1x supplicant installed to authenticate to the network

  D. Clients can be authenticated bv using their MAC address and a central radius database

  Correct Answer: BD