Users at a branch office report that video conferencing calls are choppy, but file transfers and web browsing are working normally. The network team checks the WAN link and sees that utilization is only 40%. What is the most likely cause of the video quality issue?

The WAN link bandwidth is insufficient for the video traffic.

Jitter on the WAN link is causing packet delay variation that disrupts the real-time video stream.

The video traffic is being compressed, which reduces quality.

The video conferencing application is not using QoS markings.

Why is jitter particularly harmful to real-time applications like VoIP?

It reduces the available bandwidth

It increases the propagation delay

It causes packets to arrive at irregular intervals, disrupting the playback

What is the purpose of using QoS queuing mechanisms on a WAN link?

To reduce the latency of all traffic equally

To increase the physical bandwidth of the link

To prioritize critical traffic during congestion

A campus has a 1 Gbps WAN link to a data center. The network team measures that the average throughput for a single TCP flow is only 200 Mbps, even though the link is not congested. The round-trip time is 50 ms. What is the most likely cause of the low throughput?

The TCP window size is too small for the bandwidth-delay product.

The link is experiencing packet loss.

When designing a campus WAN link, why is it important to consider both bandwidth and throughput?

Because throughput is fixed by the ISP, while bandwidth can be adjusted

Because bandwidth is the only metric that matters for application performance

Because throughput is always higher than bandwidth, so you need to plan for the extra capacity

Because throughput can be lower than bandwidth due to overhead and congestion, so you must size the link to meet actual needs

Juniper NetworksCertified Associate, Design

Domain 5Objective 3

Campus WAN Performance JN0-1103 Practice Questions (Page 3)

Part of the Campus and Branch WAN Design domain, which makes up ~33% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~12–20 in this domain), expect 1–2 from this objective — we provide 30 practice questions to prepare you well beyond it. (estimate)

30questions here

6free pages

7concepts

Questions 11–15

11application · medium
Users at a branch office report that video conferencing calls are choppy, but file transfers and web browsing are working normally. The network team checks the WAN link and sees that utilization is only 40%. What is the most likely cause of the video quality issue?
Select an answer first
12foundation · easy
Why is jitter particularly harmful to real-time applications like VoIP?
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13foundation · easy
What is the purpose of using QoS queuing mechanisms on a WAN link?
Select an answer first
14expert · hard
A campus has a 1 Gbps WAN link to a data center. The network team measures that the average throughput for a single TCP flow is only 200 Mbps, even though the link is not congested. The round-trip time is 50 ms. What is the most likely cause of the low throughput?
Select an answer first
15foundation · easy
When designing a campus WAN link, why is it important to consider both bandwidth and throughput?
Select an answer first

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