350-601 Storage Network Practice Question
An iSCSI SAN is experiencing performance issues. The storage array and initiators are connected via a dedicated VLAN. The network team notices high jitter. What is the most effective mitigation?
⚠ Common exam trap
Cisco often tests the misconception that jumbo frames or link aggregation solve latency and jitter issues, when in fact they address throughput and bandwidth, not delay variation; the trap is confusing throughput optimization with latency/jitter mitigation.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement QoS to give iSCSI traffic higher priority
High jitter indicates variable latency in the network, which is detrimental to iSCSI performance because iSCSI relies on TCP and is sensitive to delay variation. Implementing QoS to prioritize iSCSI traffic ensures consistent low-latency delivery by marking iSCSI frames (e.g., with DSCP CS4 or AF41) and queuing them ahead of other traffic, directly mitigating jitter. This is the most effective mitigation because it addresses the root cause—uncontrolled network congestion—rather than increasing parallelism or frame size.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use multiple iSCSI sessions per initiator
Why it's wrong here
Incorrect: Sessions provide multipathing, not jitter control.
- ✗
Configure link aggregation between switches
Why it's wrong here
Incorrect: LAG provides more bandwidth, not jitter reduction.
- ✗
Enable jumbo frames on all switches
Why it's wrong here
Incorrect: Jumbo frames reduce overhead but do not fix jitter.
- ✓
Implement QoS to give iSCSI traffic higher priority
Why this is correct
Correct: QoS reduces jitter by prioritizing iSCSI traffic.
Visual reference
Go deeper
Related to this question
About these practice questions
One of 984 original 350-601 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-601 exam.