FREE NOCE Network Performance Optimization Questions and Answers

Question 1

A network administrator is troubleshooting an intermittent VoIP quality issue characterized by choppy audio and dropped packets.
Which network performance metric is most critical to investigate for this type of problem?

Accepted Answer

Jitter

Answer

Bandwidth utilization

Answer

Throughput

Answer

Latency

Question 2

Which of the following techniques is most effective in reducing network congestion and improving Quality of Service (QoS) for critical applications by prioritizing specific types of traffic?

Accepted Answer

Deploying QoS policies (e.g., DSCP, MPLS Traffic Engineering)

Answer

Implementing a larger subnet mask

Answer

Increasing the physical cable length

Answer

Disabling all network security features

Question 3

A company is experiencing slow file transfers and application response times for users accessing resources over a Wide Area Network (WAN). The current WAN link has sufficient theoretical bandwidth. What is a common network optimization technique that could improve performance in this scenario, especially for applications sensitive to round-trip time?

Accepted Answer

Deploying WAN Optimization Controllers (WOCs)

Answer

Implementing a Content Delivery Network (CDN) for internal files

Answer

Increasing the number of DHCP leases

Answer

Upgrading to a higher-speed local area network (LAN) switch

Question 4

To effectively analyze historical network performance trends and proactively identify potential bottlenecks before they impact users, what type of monitoring data is most crucial to collect and store?

Accepted Answer

Baseline performance metrics (e.g., utilization, errors, latency) over time

Answer

Real-time packet captures of active sessions

Answer

Detailed configuration backups of all devices

Answer

Logs of successful user authentications

Question 5

Which network design principle aims to ensure that no single point of failure can disrupt network services, thereby improving overall network availability and often performance during failures?

Accepted Answer

Redundancy

Answer

Network Segmentation

Answer

Traffic Shaping

Answer

Load Balancing

Question 6

A network engineer needs to optimize the performance of a web server that experiences high traffic volumes, leading to slow response times during peak hours. The server itself has sufficient CPU and memory. Which optimization technique would most directly address the distribution of incoming requests to multiple backend instances?

Accepted Answer

Implementing a Load Balancer

Answer

Increasing the server's RAM

Answer

Reducing the number of network interfaces

Answer

Switching to a slower hard drive

A network administrator is troubleshooting an intermittent VoIP quality issue characterized by choppy audio and dropped packets.Which network performance metric is most critical to investigate for this type of problem?

A network administrator is troubleshooting an intermittent VoIP quality issue characterized by choppy audio and dropped packets.
Which network performance metric is most critical to investigate for this type of problem?