Free JN0-681 Juniper Practice Test V9.02

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Juniper JN0-681 exam
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Exam    :   JN0-681 
 
 
 
Title     :     
 
 
 
 
 
 
Version  :   V9.02 
 
 
 
 
 
 
 
 
 
 
 
Data Center, Professional 
(JNCIP-DC) 
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1.Which protocol is used between VCF member devices to create a loop-free topology? 
A. LLDP 
B. RSTP 
C. VCCP 
D. MSTP 
Answer: C 
 
2.You are deploying a VXLAN using EVPN signaling overlay network. PE1 and PE2 are multihomed to the 
connected CE device. 
You notice that the traffic is not load-balancing as expected. 
 
Referring to the exhibit, which two actions will solve this problem? (Choose two.) 
A. Set the ESI on both devices to 00:00:00:00:00:00:00:00:00:00. 
B. Set the route distinguisher on PE2 to 11.11.11.11:100. 
C. Set the LACP system ID on PE2 to 00:00:00:00:00:01. 
D. Set the ESI on PE2 to 00:11:11:11:11:11:11:11:11:11. 
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Answer: CD 
 
3.Referring to the exhibit, R1 and R2 are QFX5100s and are acting as VXLAN Layer 2 Gateways for VLAN 
100 using PIM-SM signaling. 
 
What will cause R2 to send a (*.G) PIM Join towards the RP? 
A. R2 will send a (*.G) PIM Join when it receives broadcast, multicast, or unknown unicast traffic from Host 
A. 
B. R2 will send a (*.G) PIM Join when it receives broadcast, multicast, or unknown unicast traffic from Host 
B. 
C. R2 will send a (*.G) PIM Join when it first learns the MAC address of a locally attached host. 
D. R2 will send a (*.G) PIM Join when its VLAN 100 configuration is committed. 
Answer: D 
 
4.Your server administrator asks you to preserve the inner VLAN tags of the frames coming from a Layer 2 
VXLAN Gateway of the EVPN-enabled segment. 
Which two parameters must you add to the configuration to allow the VLAN tag to be passed? (Choose 
two.) 
A. decapsulate-accept-inner-vlan 
B. encapsulate-inner-vlan 
C. layer2-protocol-tunneling 
D. dotlq-tunneling 
Answer: AB 
 
5.You are implementing a Virtual Chassis using QFX5100s and EX4300s in your data center. 
In this scenario, which three hardware capabilities are affected? (Choose three.) 
A. MAC table size 
B. maximum number of firewall filters 
C. usable VCP connections limited to 10GbE 
D. number of usable ports per member 
E. number of supported routing instances 
Answer: ABE 
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6.The exhibit shows an output from a QFX5100 Series switch serving as an MC-LAG peer. 
 
Which two statements are true in this scenario? (Choose two.) 
A. ae0.0 is functioning as an ICL. 
B. et-0/0/51.0 is a standalone link and not part of an MC-AE bundle. 
C. ae1.0 is functioning as an ICL. 
D. et-0/0/51.0 is a member link of qfx5100-1 within an MC-AE bundle. 
Answer: AB 
 
7.You have built a mixed-mode VCF consisting of two QFX5100-24Qs as pines, two QFX5100-48S as 
leaf nodes, and one EX4300 as a leaf node. The VCF is working for all devices, except the EX4300 40GbE 
fabric links will not join the VCF. 
In this scenario, what must be corrected to solve the connectivity problem? 
A. Zeroize the EX4300, cleat all the tables with the clear ethernet-switching tables command on all 
members, and reissue the request virtual-chassis mixed-mode command. 
B. Turn off authonegotiation on the EX4300 and the attached spine interfaces, and then use the request 
virtual- chassis vc-port set command on the spine ports connected to the EX4300. 
C. Power off all of the VCF members and power up the spines before powering up the leafs. 
D. Reboot all of the VCF members. 
Answer: D 
 
8.Which 3 benefits do VXLANs offer to VLANs? (Choose three.) 
A. VXLAN uses a 24-bit VNID to overcome the 4094 vlan scale limitation 
B. It provide better utilization of available paths in the overlay infrastructure 
C. It provides better utilization of available network paths in the underlay infrastructure 
D. It provides a solution to extent Layer 2 segments over a shared Layer 3 routed network 
E. VXLAN uses a 16-bit VNID to overcome the 4094 vlan scale limitation 
F. It provide a solution to extent Layer 2 segment over a single Layer 2 VLAN 
Answer: ACD 
 
9.Which statement describes a Juniper Virtual Chassis Fabric? 
A. two or more QFX Series or EX Series switches in a daisy-chain topology 
B. two or more QFX Series or EX Series switches in a ring topology 
C. two or more QFX Series or EX Series linked in a spine-leaf topology 
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D. two or more QFX Series or EX Series switches in a full mesh topology 
Answer: C 
 
10.You have configured a DHCP server for ZTP as shown in the exhibit. 
 
Your network contains EX2200 and QFX5100 devices, however, only the EX2200s are receiving the 
baseline configuration file. You want to ensure that all of the switches in your network receive the baseline 
configuration file. 
Which actions will satisfy this requirement? 
A. Remove the ignore client-updates statement. 
B. Change the 150 suboption to reference the MAC address. 
C. Use FTP instead of TFTP for the transfer protocol. 
D. Reference all the switch models in the file where necessary. 
Answer: D 
 
11.Referring to the exhibit, R1 and R2 are QFX5100s and are acting as VXLAN Layer 2 Gateways for 
VLAN 100 using PIM-SM signaling. R2 currently has only the (*.G) state established for VNI 5100. 
 
Which event will cause R2 to establish the (S,G) state for VNI 5100 using R1 as the multicast source? 
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A. when R1 receives a known unicast Ethernet frame from Host A 
B. when R2 receives broadcast, multicast, or unknown unicast from Host A 
C. when R2’s VNI 5100 configuration is committed 
D. when R2 first learns the MAC address of a locally attached host 
Answer: A 
 
12.You are building a DCI solution and need both a Layer 2 solution and a Later 3 solution for different 
workloads within your data centers. 
What are two reasons why MPLS would be used a transport for this DCI solution? (Choose two.) 
A. The fast failover capabilities of MPLS nodes can be accomplished in a recovery time that is equivalent to 
50 ms or better. 
B. MPLS allows you to interconnect multiple data centers over a public IP network. 
C. MPLS allows for any-to-any connectivity allowing for both Layer 2 and Layer 3 DCIs. 
D. MPLS allows you to natively runnel your own Layer 2 traffic through the service provided L3VPN. 
Answer: CD 
 
13.Referring to the VCF shown in the exhibit, what is the remote destination trunk weight for the SW-4, 
SW-1, SW-5 path? 
 
A. 10/40 
B. 30/40 
C. 20/40 
D. 40/40 
Answer: C 
 
14.You are asked to design a deployment plan for a large number of QFX Series switches using zero touch 
provisioning (ZTP). The ZTP deployment plan must ensure all switches are upgraded to the desired 
software version. 
Which DHCP option are suboption combination would be used to accomplish this task? 
A. DHCP options 66 with a supoption of 03 
B. DHCP options 43 with a supoption of 03 
C. DHCP options 43 with a supoption of 00 
D. DHCP options 66 with a supoption of 00 
Answer: C 
 
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15.A customer notices that all traffic is traveling over a single link within their partially meshed IP Fabric 
using IBGP. While troubleshooting, the customer notices that the configuration is missing a configuration 
parameter. 
Which parameter would the customer use to solve this problem? 
A. add-path 
B. accept-remote-nexthop 
C. advertise-peer-as 
D. multihop 
Answer: A 
 
16.You are performing an in-service software upgrade (ISSU) on an QFX5100 Series device. 
Which two statements are correct in this scenario? (Choose two.) 
A. The vccpd process is used to synchronize the state of the master RE to the new backup RE. 
B. The mgd process is used to validate system configuration requirements. 
C. The ksyncd process is used to synchronize the state of the master RE to the new backup RE. 
D. The dcd process is used to validate system configuration requirements. 
Answer: BC 
 
17.Which two statements are true regarding IP fabrics? 
A. An IP fabric uses standby links for redundancy. 
B. An IP fabric uses routing protocols to avoid loops. 
C. An IP fabric load balances across links for redundancy. 
D. An IP fabric uses Spanning Tree Protocol to avoid loops. 
Answer: BC 
 
18.Referring to the exhibit, PE1 and PE2 are acting as MPLS Layer 3 VPN PEs to provide the DCI between 
DC1 and DC2, which are IP Fabrics. Leaf1 and Leaf2 are QFX5100 Series devices acting as VXLAN Layer 
2 Gateways using EVPN signaling for the same VXLAN segment. 
 
Which statement is correct about the Edge1 device in this scenario? 
A. Edge1's routing table must contain an IP route to both Leaf1 and Leaf2. 
B. Edge1 must be configured for BGP labeled unicast on its PE1-facing interface. 
C. Edge1 must be configured for MP-BGP using L3VPN signaling. 
D. Edge1 must be configured for MP-BGP using EVPN signaling. 
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Answer: D 
 
19.You are configuring VXLAN on a network of QFX5100s, and are using the set vlans vlan100 vxlan 
command: unreachable-vtep-aging-timer 600 
What does this command do? 
A. This command ages out a locally learned MAC address assigned to the VTEP after 600 seconds of 
inactivity. 
B. This command ages out the address of the remote VTEP 600 seconds after the last learned MAC 
address expires. 
C. This command ages out all learned MAC addresses assigned to the VTEP after 600 seconds of 
inactivity. 
D. This command ages out a remotely learned VTEP address after 600 seconds of inactivity. 
Answer: B 
 
20.Referring to the exhibit, SW-3 and SW-4 have been configured for mixed-mode VCF and added to the 
VCF. After cabling the new devices into the VCF, you notice that SW-3 automatically joins the VCF, 
whereas SW-4 does not. 
 
Why are SW-3 and SW-4 behaving this way? (Choose two.) 
A. By default, QFX5100 ports are enabled as VCPs. 
B. By default, QFX5100 ports are not enabled as VCPs. 
C. By default, EX4300 QSPF+ ports are not enabled as VCPs. 
D. By default, EX4300 QSFP+ ports are enabled as VCPs. 
Answer: BD 
 
21.What are three benefits of EVPN that would improve the current E-line, E-LAN, and E-Tree delivery? 
(Choose three.) 
A. integrated L2/L3 connectivity 
B. greater Multiprotocol Label Switching scale 
C. network resiliency between edge nodes 
D. native support for multihoming 
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E. efficient security provisioning 
Answer: ABD 
 
22.Which statement is valid for EVPN multihoming CE1 to PE1 and PE2 as shown in the exhibit? 
 
A. CE1 must have LACP enabled on the interfaces attached to the PEs. 
B. The PEs must be manually configured for the ESI value on the interfaces attached to the CEs. 
C. The PEs use BPDU autodiscovery by enabling STP on the interfaces attached to CE1. 
D. CE1 must have the MAC mobility extended community enabled in BGP on both the CE and PEs. 
Answer: A 
 
23.What is the endpoint of a VXLAN tunnel? 
A. DLCI 
B. LSR 
C. VTEP 
D. VCF 
Answer: C 
 
24.The MC-LAG group shown in the exhibit is providing high availability services for the directly connected 
servers. 
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Where does Juniper Networks recommend you provide the backup livenes detection? 
A. on the ae2 interface 
B. on the ae1 interface 
C. on the management interfaces 
D. on the ICL-PL connection 
Answer: D 
 
25.A customer has a 3-stage Clos architecture with three spine devices as shown in the exhibit. 
 
If a single spine device fails, what percentage of the remaining bandwidth will be available from leaf node 
to leaf node? 
A. approximately 25% 
B. approximately 33% 
C. approximately 75% 
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D. approximately 66% 
Answer: D 
 
26.Which two options are network consideration for common VXLAN deployment? (Choose two.) 
A. MTU size in the transport network 
B. consistent VLAN-to-VN-Segment mapping 
C. placement of VXLAN tunnel endpoints 
D. multicast group scaling 
E. consistent VNI-to-group mapping 
Answer: BE 
 
27.What are two methods used to scale an IBGP IP Fabric? (Choose two.) 
A. route reflection 
B. spanning tree 
C. confederations 
D. redundant trunk groups 
Answer: AC 
 
28.What are two valid types of VXLAN signaling? (Choose two.) 
A. RSTP 
B. PIM 
C. EVPN 
D. RSVP 
Answer: CD 
 
29.You are building an EVPN Data Center Interconnect. You must support multiple VLANs in a single 
EVPN instance. 
Which parameter provides this functionality? 
A. instance-type evpn 
B. instance-type no-forwarding 
C. instance-type 12vpn 
D. instance-type virtual-switch 
Answer: A 
 
30.You are deploying MC-LAG as shown in the exhibit. 
 
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Which statement is correct when using active/standby mode? 
A. VCCP is used to exchange MAC addresses between MC-LAG peers. 
B. All traffic from Server A to Host 1 will traverse the link between Server A and ex2. 
C. A spanning tree protocol should be used to avoid Layer 2 loops between Server A and both switches. 
D. Only ICCP control traffic is allowed through the ICL-PL connection. 
Answer: D