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Following questions and answers are all new published by Juniper Official Exam Center: https://www.lead2pass.com/jn0-680.html
Which EVPN service consists of a single broadcast domain per EVPN instance?
A. a VLAN bundle service interface
B. a VLAN-based service interface
C. a port-based VLAN-aware service interface
D. a port-based service interface
Which two statements are correct when performing a unified ISSU? (Choose two.)
A. The master Routing Engine and backup Routing Engine must be running the same software version before you can perform a unified ISSU.
B. Unicast RPF-related statistics are not saved across a unified ISSU, and the unicast RPF counters are reset to zero during a unified ISSU.
C. Unicast RPF-related statistics are saved across a unified ISSU, and the unicast RPF counters are not reset to zero during a unified ISSU.
D. The backup Routing Engine must be running the most recent software version before you can perform a unified ISSU.
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. Leaf 1 and Leaf 2 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 must be configured for MP-BGP using EVPN signaling.
B. Edge1 must be configured for MP-BGP using L3VPN signaling.
C. Edge1 must be configured for BGP labeled unicast on its PE1-facing interface.
D. Edge1’s routing table must contain an IP route to both Leaf1 and Leaf2.
Assumption here that the MPLS backbone network offers EVPN; this is the most fully-featured solution.
This could also be achieved via C; BGP-LU shared with the provider, basically extending MPLS down to the Edge1+2 routers; this is less `risky’ for the MPLS backbone operator. B and D are ignoring EVPN/ VXLAN components and refer to traditional Layer 3 IP routing.
Referring to the exhibit, which two MAC addresses are learned from the local side of the MC-LAG link?
A. 4c:96:14:e8:c6:fe and 4c:96:14:e8:a6:16
B. 4c:96:14:e8:c6:fd and 4c:96:14:e8:f0:21
C. 4c:96:14:e8:c6:fd and 4c:96:14:e8:a6:16
D. 4c:96:14:e8:f0:21 and 4c:96:14:e8:a6:16
Flag `DL’ means Dynamic, Locally-learned (DR means Dynamic, Remote PE MAC)
An EX9200 switch is acting as a Layer 3 VXLAN gateway.
In this scenario. which action will allow you to communicate between two VLANs?
A. Configure L3 physical interfaces to connect the VXLANs.
B. Configure IRB interfaces to connect the VXLANs.
C. Configure LAG interfaces to connect the VXLANs.
D. Configure a VPLS instance.
You are deploying a spine-and-leaf IP Fabric in your data center using EBGP.
In this scenario, which three statements are true? (Choose three.)
A. Each device should you use a different autonomous system number.
B. Each leaf must peer to each spine.
C. Each device should also run an IGP to advertise loopback interfaces.
D. EBGP does not require a next-hop self-policy.
E. Each leaf must peer to every other leaf.
VMs on Server-1 and Server-2 are on the same Layer 2 domain within a VCF and are sending traffic to each other.
Referring to the exhibit, which three criteria are used when load-balancing traffic? (Choose three.)
B. source MAC
C. incoming port ID
D. Layer 4 source port
E. destination IP
http://nextheader.net/2016/10/28/virtual-chassis-fabric-part-ii-control-and-forwarding-plane/ Layer 2 load-balancing hashing does not involve Layer 3 or Layer 4 header information.
IE: Layer 2: source MAC, destination MAC, Ethertype, Vlan ID, Incoming Port ID, source member ID
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JN0-680 new questions on Google Drive: https://drive.google.com/open?id=0B3Syig5i8gpDa21fcXlEWkh1M2c
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