Juniper JN0-643 Online Practice Questions and Exam Preparation

Juniper JN0-643 Online Questions & Answers

• Question 191:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  You are implementing Q-in-Q tunneling to connect R1 and R2 using the configurations shown in the exhibit.

  What must be changed on Switch_A to allow both Dot1q-tunneling VLANs and non-Dot1q- tunneling VLANs on the same trunk interface?

  A. Change the Dot1q-tunneling Ethertype to 0x9100.
  B. Change the Dot1q-tunneling Ethertype to 0x88a8.
  C. Change the Dot1q-tunneling Ethertype to 0x8100.
  D. Change the Dot1q-tunneling Ethertype to 0x98a8.
  C. Change the Dot1q-tunneling Ethertype to 0x8100.

• Question 192:

  -- Exhibit -

  {master:0}[edit]

  user@switch# show protocols vstp

  vlan 100;

  {master:0}[edit]

  user@switch# run show spanning-tree bridge

  STP bridge parameters

  Context ID : 1

  Enabled protocol : RSTP

  STP bridge parameters for VLAN 100

  Root ID : 32868.50:c5:8d:ae:94:80

  Hello time : 2 seconds

  Maximum age : 20 seconds

  Forward delay : 15 seconds

  Message age : 0

  Number of topology changes : 0

  Local parameters

  Bridge ID : 32868.50:c5:8d:ae:94:80

  Extended system ID : 1

  Internal instance ID : 0

  {master:0}[edit]

  user@switch# run show spanning-tree interface

  {master:0}[edit]

  user@switch#

  -- Exhibit -

  Click the Exhibit button.

  Based on the output shown in the exhibit, why is VSTP not working for VLAN 100?

  A. No interfaces are assigned to VLAN 100.
  B. Your MSTI is misconfigured.
  C. RSTP is configured in addition to VSTP.
  D. No native VLAN is configured.
  A. No interfaces are assigned to VLAN 100.

• Question 193:

  -- Exhibit -[edit protocols vstp] 'vlan all' Cannot configure VSTP on all VLANs when more than 253 VLANs are configured. Configure vstp vlan- group along with STP or RSTP to cover all VLANs [edit protocols] 'vstp' Failed to configure vstp on all vlans error: configuration check-out failed -- Exhibit -

  Click the Exhibit button.

  What are two reasons for the commit error shown in the exhibit? (Choose two.)

  A. The set protocols vstp vlan all configuration is not supported.
  B. There are more than 253 VLANs configured on the switch.
  C. MSTP is not configured with VSTP.
  D. STP or RSTP is not configured along with VSTP on the switch.
  B. There are more than 253 VLANs configured on the switch.
  D. STP or RSTP is not configured along with VSTP on the switch.

• Question 194:

  You are creating a class of service, policy for your enterprise network. You want to ensure that the traffic classes have consistent classification and DSCP markings. In this scenario, which three actions would you perform to accomplish this task? (Choose three)

  A. choose a behavior aggregate classifier matching the correct DSCP values on all core facing interfaces
  B. configure a multifield classifier matching on IP address and protocol the maps incoming traffic to specific forwarding classes on ingress port of the access device
  C. configure a rewrite rule on the access device to mark all traffic towards the core to have the correct DSCP markings
  D. choose a behavior aggregate classifier matching on IP address and protocol the maps incoming traffic to specific forwarding classes on ingress ports of the access devices configure a rewrite rule on the access device to mark all traffic towards the end points to have the correct DSCP markings
  A. choose a behavior aggregate classifier matching the correct DSCP values on all core facing interfaces
  B. configure a multifield classifier matching on IP address and protocol the maps incoming traffic to specific forwarding classes on ingress port of the access device
  C. configure a rewrite rule on the access device to mark all traffic towards the core to have the correct DSCP markings

• Question 195:

  Each user in the office has a desktop computer and an IP telephone that share the same physical port that connects to the access switch. To provide security in the office 802 lx authentication has been turned on. Which two port access modes should be configured to allow both the desktop computer and IP telephone to connect through the network?

  A. single supplicant mode
  B. single secure supplicant mode
  C. multiple supplicant mode
  D. volP-compatibility supplicant mode
  A. single supplicant mode
  B. single secure supplicant mode

• Question 196:

  R1 and R2 are ASBRs in the same area, each with an equal cost external path to the same external network prefix. R1 advertises an external route into OSPF with a Type 1 metric. R2 advertises an external route into OSPF with a Type 2 metric.

  Which route would be preferred?

  A. R1's route is preferred because Type 1 metrics take into account the external cost only.
  B. R1's route is preferred because Type 1 metrics take into account the internal and external cost.
  C. R2's route is preferred because Type 2 metrics take into account the internal and external cost.
  D. R2's route is preferred because Type 2 metrics take into account the external cost only.
  D. R2's route is preferred because Type 2 metrics take into account the external cost only.

• Question 197:

  -- Exhibit

  

  -- Exhibit -

  Click the Exhibit button.

  As shown in the exhibit, the 10.10/16 prefix is redistributed into OSPF through R2 and R5. R2 is advertising the prefix with a Type 1 metric of 100 and R5 is advertising the prefix with a Type 2 metric of 10.

  What is the preferred path to reach 10.10/16 from R6?

  A. R6-R5
  B. R6-R4-R5
  C. R6-R4-R5-R2
  D. R6-R4-R3-R2
  D. R6-R4-R3-R2

• Question 198:

  -- Exhibit

  

  -- Exhibit -Click the Exhibit button.

  Referring to the exhibit, you are asked to verify certain routing information within your OSPFv3 routing domain. You must review the prefixes learned from R3.

  Which two LSA types from the output shown in the exhibit must be reviewed? (Choose two.)

  A. the Router LSAs from RID 10.0.0.2
  B. the Extern LSAs from RID 10.0.0.2
  C. the InterArPfx LSAs from RID 10.0.0.2
  D. the Network LSAs from RID 10.0.0.2
  B. the Extern LSAs from RID 10.0.0.2
  C. the InterArPfx LSAs from RID 10.0.0.2

• Question 199:

  Which option is a valid IPv6 multicast address?

  A. fe80::205:8640:471:3200/64
  B. ::172.16.0.5/126
  C. ff03:365:ba::23
  D. ff01:cgfc:345::226:8ff:fee4:bf6f
  C. ff03:365:ba::23

• Question 200:

  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.
  B. MF classification overrides BA classification.