How are routes typically propagated in an IP fabric using BGP as the underlay?

Spine switches advertise all routes directly to end hosts

Routes are propagated only within a single leaf switch and not across the fabric

Routes are advertised only to the spine switches and never to other leaves

Leaf switches advertise their loopback and fabric prefixes to all spine switches, which then propagate them to other leaves

A leaf switch in an IP fabric has four equal-cost uplinks to four spines. The network team notices that a single flow (e.g., a large file transfer) is always using only one uplink, while other flows are distributed. What is the most likely reason?

The leaf is using weighted ECMP

Per-flow load balancing is based on a hash of the 5-tuple

ECMP is not enabled on the leaf

The spines are not advertising the same prefix

In an IP fabric, what is the primary function of Equal-Cost Multipath (ECMP)?

To provide a backup path that is used only when the primary path fails

To select a single best path based on the lowest metric

To load balance traffic across multiple equal-cost paths and provide redundancy

To reduce the number of routing table entries by combining multiple paths

What is a key benefit of using IP fabric routing compared to traditional Layer 2 spanning-tree designs in a data center?

It allows all links to be active and forwarding traffic simultaneously

It simplifies configuration by using a single VLAN across the entire fabric

It eliminates the need for IP addressing on switch interfaces

It requires fewer switches to build a data center network

What is the primary purpose of using BGP EVPN as an overlay routing protocol in a data center IP fabric?

To replace the need for VLANs and VXLAN in the data center

To provide a single Layer 2 broadcast domain across the entire fabric

To provide a backup routing protocol in case the underlay fails

To advertise tenant MAC and IP routes and enable VXLAN encapsulation for scalable multi-tenant connectivity

Juniper NetworksCertified Professional, Data Center (JNCIP-DC)

Domain 2Objective 2

IP Fabric Routing JN0-683 Practice Questions (Page 2)

Part of the Layer 3 Fabrics domain, which makes up ~23% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~8–14 in this domain), expect 1–2 from this objective — we provide 27 practice questions to prepare you well beyond it. (estimate)

27questions here

6free pages

7concepts

Questions 6–10

6foundation · easy
How are routes typically propagated in an IP fabric using BGP as the underlay?
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7application · medium
A leaf switch in an IP fabric has four equal-cost uplinks to four spines. The network team notices that a single flow (e.g., a large file transfer) is always using only one uplink, while other flows are distributed. What is the most likely reason?
Select an answer first
8foundation · easy
In an IP fabric, what is the primary function of Equal-Cost Multipath (ECMP)?
Select an answer first
9foundation · easy
What is a key benefit of using IP fabric routing compared to traditional Layer 2 spanning-tree designs in a data center?
Select an answer first
10foundation · easy
What is the primary purpose of using BGP EVPN as an overlay routing protocol in a data center IP fabric?
Select an answer first

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