A company has a pair of access switches in a data center. They have two server VLANs (VLAN 10 and VLAN 20) and need to route traffic between them. They want to avoid using a separate router and prefer to use the access switches for inter-VLAN routing. What should they configure on the access switches?

Create a Layer 2 trunk between the access switches and a core router

Configure IRB interfaces for VLAN 10 and VLAN 20 on each access switch

Configure a single VLAN with both subnets

Enable STP on the access switches to route between VLANs

What is the purpose of tunneling protocols like VXLAN?

To encapsulate Layer 2 frames over a Layer 3 network.

To replace the need for IP addresses.

To compress data for faster transmission.

To encrypt all network traffic.

A network architect is designing a new data center fabric. They have a requirement to support both IPv4 and IPv6 for the underlay. They also want to use a routing protocol that supports both address families natively and provides ECMP. Which protocol should they choose?

Static routes for IPv4 and IPv6

RIPng for IPv6 and OSPFv2 for IPv4

OSPFv2 for IPv4 and OSPFv3 for IPv6

EBGP with address families for IPv4 and IPv6

How does ECMP provide redundancy in a Layer 3 network?

By using STP to block redundant paths.

By using a single path that is always available.

By requiring a backup router for each path.

By using multiple equal-cost paths, traffic can be rerouted if one path fails.

A data center has a spine-and-leaf fabric with four spine switches. Each leaf has four equal-cost paths to the spines. The network team wants to ensure that traffic is distributed evenly across all four paths. What is the default behavior of Junos for ECMP?

Junos uses a hash based on the source and destination IP addresses to distribute traffic across up to 16 ECMP paths by default

Junos requires manual configuration to enable ECMP

Junos only supports a maximum of 4 ECMP paths by default

Junos uses round-robin to distribute traffic across all ECMP paths

Juniper NetworksCertified Associate, Data Center

Domain 1Objective 3

Layer 2 and Layer 3 Strategies JN0-281 Practice Questions (Page 1)

Part of the Data Center Architectures domain, which makes up ~30% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~11–18 in this domain), expect 2–4 from this objective — we provide 32 practice questions to prepare you well beyond it. (estimate)

32questions here

7free pages

10concepts

Questions 1–5

1application · medium
A company has a pair of access switches in a data center. They have two server VLANs (VLAN 10 and VLAN 20) and need to route traffic between them. They want to avoid using a separate router and prefer to use the access switches for inter-VLAN routing. What should they configure on the access switches?
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2foundation · easy
What is the purpose of tunneling protocols like VXLAN?
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3expert · hard
A network architect is designing a new data center fabric. They have a requirement to support both IPv4 and IPv6 for the underlay. They also want to use a routing protocol that supports both address families natively and provides ECMP. Which protocol should they choose?
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4foundation · easy
How does ECMP provide redundancy in a Layer 3 network?
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5application · medium
A data center has a spine-and-leaf fabric with four spine switches. Each leaf has four equal-cost paths to the spines. The network team wants to ensure that traffic is distributed evenly across all four paths. What is the default behavior of Junos for ECMP?
Select an answer first

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