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Juniper JN0-682 Practice Test - Questions Answers, Page 3

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You are troubleshooting an L3VPN that is part of an EVPN/MPLS DCI. You notice that the EVPN overlay BGP session toward 10.29.50.4 is unable to establish. Why is the BGP session failing to establish?
Refer to the exhibit. Referring to the exhibit, which two statements are correct? (Choose two.)
Which two statements about a DHCP relay in an EVPN-VXLAN fabric are correct? (Choose two.)
Which two combinations are supported when configuring a Virtual Chassis Fabric? (Choose two.)
Which two statements are true Virtual Chassis? (Choose two.)
Referring to the exhibit, each node in the IP fabric is peering to its directly attached neighbor using EBGP. Each node is peering using physical interface IP addresses. Leaf 2 and Leaf 3 are advertising the 10.1.1/24 network into EBGP. Spine 2 must be configured so that it can load- share traffic destined to the 10 1.1/24 network over both next-hop A and next-hop B. Which two actions must be performed to accomplish this task? (Choose two.)
Which protocol is used between VCF member devices to create a loop-free topology?
You are asked to enable plug-and-play line card switches in an active VCF without making any future Junos configuration charges. You are also required to ensure that all new line card are automatically upgrade to the correct Junos version without any manual intervention. In this scenario, which two actions will accomplish this task? (Choose two.)
Which two statements are correct about VXLANs? (Choose two.)
Which two statements define the use of route targets and route distinguishers in an EVPN? (Choose two.)

Question 21

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Which IP fabric underlay protocol provides the highest degree of scalability?

A.
IS-IS
A.
IS-IS
Answers
B.
RIP
B.
RIP
Answers
C.
EBGP
C.
EBGP
Answers
D.
OSPF
D.
OSPF
Answers
Suggested answer: C

Explanation:

Among the listed protocols, External Border Gateway Protocol (EBGP) provides the highest degree of scalability for an IP fabric underlay. EBGP is designed for inter-autonomous system routing and thus is well-suited to handle large-scale network environments with robustness and scalability. It is commonly used in data center fabrics due to its ability to efficiently manage routing information and scale with the network as it grows.

Reference: Juniper Networks Data Center Design - IP Fabric.

Question 22

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Referring to the exhibit, which two statements are correct? (Choose two.)

A.
The local leaf is using the 192.168.100.102 IP address as the local anchor point of the VTEP tunnel.
A.
The local leaf is using the 192.168.100.102 IP address as the local anchor point of the VTEP tunnel.
Answers
B.
The remote leaf is using the 192.168.100.102 IP address as the local anchor point of the VTEP tunnel.
B.
The remote leaf is using the 192.168.100.102 IP address as the local anchor point of the VTEP tunnel.
Answers
C.
The remote leaf is using the 192.168.100.101 IP address as the local anchor point of the VTEP tunnel.
C.
The remote leaf is using the 192.168.100.101 IP address as the local anchor point of the VTEP tunnel.
Answers
D.
The local leaf is using the 192.168.100.101 IP address as the local anchor point of the VTEP tunnel.
D.
The local leaf is using the 192.168.100.101 IP address as the local anchor point of the VTEP tunnel.
Answers
Suggested answer: A, C

Question 23

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Site 1 contains 20+ VMs. The link between Site 1 and Leaf1 goes down. Referring to the exhibit, which statement is correct?

A.
Type-1 routes for each VM will expire one at a time.
A.
Type-1 routes for each VM will expire one at a time.
Answers
B.
Type-1 routes for all VMs in the site will expire all at once.
B.
Type-1 routes for all VMs in the site will expire all at once.
Answers
C.
Type-1 routes for all VMs in the site will be withdrawn all at once.
C.
Type-1 routes for all VMs in the site will be withdrawn all at once.
Answers
D.
Type-1 routes for each VM will be withdrawn one at a time.
D.
Type-1 routes for each VM will be withdrawn one at a time.
Answers
Suggested answer: C

Question 24

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Referring to the exhibit,

what happens when you initiate ZTP on a QFX5120 switch running Junos 21.3R1.9?

A.
ZTP skips both the Junos installation and the configuration.
A.
ZTP skips both the Junos installation and the configuration.
Answers
B.
ZTP performs the Junos installation but skips the configuration.
B.
ZTP performs the Junos installation but skips the configuration.
Answers
C.
ZTP performs both the Junos installation and the configuration.
C.
ZTP performs both the Junos installation and the configuration.
Answers
D.
ZTP skips the Junos installation but applies the configuration.
D.
ZTP skips the Junos installation but applies the configuration.
Answers
Suggested answer: D

Question 25

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When considering VRF routing-instances for network segmentation, which two statements are true? (Choose two.)

A.
A logical interface can participate in multiple VRFs.
A.
A logical interface can participate in multiple VRFs.
Answers
B.
Multiple VRFs on a single device consolidate routing information to a single table.
B.
Multiple VRFs on a single device consolidate routing information to a single table.
Answers
C.
VRFs have independent routing tables.
C.
VRFs have independent routing tables.
Answers
D.
VRFs support overlapping subnets.
D.
VRFs support overlapping subnets.
Answers
Suggested answer: C, D

Explanation:

Virtual Routing and Forwarding (VRF) instances allow multiple virtual routing tables to exist on a single physical router. Each VRF has its own independent routing table, which allows network paths to be segmented without interference from other VRFs. This design supports overlapping IP address spaces, enabling the same IP subnet to be used in different VRFs without conflict.

Reference

Virtual Routing and Forwarding

Question 26

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What are two types of EVPN routes? (Choose two.)

A.
ES-lmport route target
A.
ES-lmport route target
Answers
B.
Ethernet segment
B.
Ethernet segment
Answers
C.
MAC mobility
C.
MAC mobility
Answers
D.
MAC advertisement
D.
MAC advertisement
Answers
Suggested answer: C, D

Explanation:

In Ethernet VPN (EVPN), MAC mobility and MAC advertisement are crucial route types. MAC mobility is used to handle the movement of MAC addresses between different network locations, ensuring accurate and efficient traffic forwarding. MAC advertisement routes are used to advertise the presence of MAC addresses, enabling the correct forwarding of Ethernet frames in an EVPN environment.

Reference

EVPN Overview

Question 27

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You are considering deploying a MAC-VRF type routing instance with a VLAN-bundle service type. In this scenario, which two statements are correct? (Choose two.)

A.
It can be implemented in a bridge overlay architecture.
A.
It can be implemented in a bridge overlay architecture.
Answers
B.
VLAN normalization is supported.
B.
VLAN normalization is supported.
Answers
C.
Multiple VLAN IDs per EVI are supported.
C.
Multiple VLAN IDs per EVI are supported.
Answers
D.
It can be implemented in an ERB architecture.
D.
It can be implemented in an ERB architecture.
Answers
Suggested answer: A, C

Explanation:

A MAC-VRF (MAC Virtual Routing and Forwarding) instance with a VLAN-bundle service type is used in EVPN-VXLAN architectures. It can be implemented in a bridged overlay architecture where Ethernet segments are bridged across the EVPN-VXLAN network. This setup supports multiple VLAN IDs per Ethernet VPN Instance (EVI), enabling the segregation and transport of traffic from different VLANs over the same EVPN-VXLAN infrastructure.

Reference

[EVPN-VXLAN Configuration Guide](https://www.juniper.net/documentation/us/en/software/en/software/junos/evpn-vxlan/topics/topic-map/evpn-overview.htm

Question 28

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Referring to the exhibit, you have a data center with two PODs. Seamless EVPN-VXLAN stitching is used to facilitate communication between the PODs.

Which three statements are true in this scenario? (Choose three.)

A.
AVXLAN tunnel can form between L2 and S1.
A.
AVXLAN tunnel can form between L2 and S1.
Answers
B.
A VXLAN tunnel can form between S1 and S2.
B.
A VXLAN tunnel can form between S1 and S2.
Answers
C.
AVXLAN tunnel can form between L1 and L2.
C.
AVXLAN tunnel can form between L1 and L2.
Answers
D.
AVXLAN tunnel can form between L2 and S3.
D.
AVXLAN tunnel can form between L2 and S3.
Answers
E.
AVXLAN tunnel can form between L1 and L4.
E.
AVXLAN tunnel can form between L1 and L4.
Answers
Suggested answer: A, B, D

Question 29

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A customer wants to connect two data centers on different subnets using EVPN. What are two implications of using different IP subnets at each site? (Choose two.)

A.
Using different IP subnets at each site allows Layer 3 gateways to exchange only type-3 routes.
A.
Using different IP subnets at each site allows Layer 3 gateways to exchange only type-3 routes.
Answers
B.
MAC addresses will need to be advertised between the data centers.
B.
MAC addresses will need to be advertised between the data centers.
Answers
C.
MAC addresses will not need to be advertised between the data centers.
C.
MAC addresses will not need to be advertised between the data centers.
Answers
D.
Using different IP subnets at each site allows Layer 3 gateways to exchange only type-5 routes.
D.
Using different IP subnets at each site allows Layer 3 gateways to exchange only type-5 routes.
Answers
Suggested answer: B, D

Explanation:

When connecting two data centers on different subnets using EVPN, MAC addresses need to be advertised between the data centers to maintain Layer 2 connectivity. Using different subnets implies the need for Layer 3 gateways at each site, which typically involve exchanging type-5 routes in an EVPN context.

Reference:

EVPN for Data Center Interconnect

Question 30

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You want to enable an EBGP-based IP fabric to allow ECMP routes to be populated into the RIB. In this scenario, which action will accomplish this task?

A.
Enable the forwarding-options ecmp-do-local-lookup parameter.
A.
Enable the forwarding-options ecmp-do-local-lookup parameter.
Answers
B.
Enable the multipath multiple-as BGP parameter.
B.
Enable the multipath multiple-as BGP parameter.
Answers
C.
Enable the routing-options multipath global parameter.
C.
Enable the routing-options multipath global parameter.
Answers
D.
Enable the chassis ecmp-alb parameter.
D.
Enable the chassis ecmp-alb parameter.
Answers
Suggested answer: B

Explanation:

To enable ECMP (Equal-Cost Multi-Path) routes in the Routing Information Base (RIB) in an EBGP-based IP fabric, you should enable the 'multipath multiple-as' BGP parameter. This setting allows the use of multiple paths for BGP routes even when they come from different autonomous systems, which is key in a typical EBGP deployment in a data center IP fabric.

Reference:

BGP and Multipath Routing

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