Microsoft Networking Essentials Exam Quality Control & Assurance 5 — Questions and Answers
Question 1: What is the primary purpose of testing network redundancy as part of quality assurance?
- Verifying that failover mechanisms work before an actual failure occurs (Correct answer)
- Increasing available bandwidth on all links
- Reducing the number of network devices required
- Simplifying network documentation
Correct answer: Verifying that failover mechanisms work before an actual failure occurs
Redundancy testing validates that backup paths and systems activate correctly so failures don't cause unplanned outages.
Question 2: A network team implements change management procedures as part of QA. What is the main benefit?
- Preventing unauthorized changes that could degrade network performance (Correct answer)
- Automatically backing up all network configurations
- Encrypting all network management traffic
- Assigning static IPs to all managed devices
Correct answer: Preventing unauthorized changes that could degrade network performance
Change management ensures all network modifications are reviewed, approved, and documented to avoid unintended outages.
Question 3: Which Ethernet error type occurs when a frame is smaller than the minimum 64-byte size?
- Runt (Correct answer)
- Giant
- Jabber
- Fragment
Correct answer: Runt
Runt frames are smaller than the 64-byte minimum Ethernet frame size and are usually caused by collisions or NIC failures.
Question 4: What does MTTR (Mean Time to Repair) measure in network quality assurance?
- Average time required to restore a failed network component to operation (Correct answer)
- Average time between network equipment failures
- Maximum acceptable packet loss percentage
- Minimum bandwidth guaranteed by an SLA
Correct answer: Average time required to restore a failed network component to operation
MTTR measures how quickly the team can diagnose and fix failures, reflecting the efficiency of support processes.
Question 5: Which feature on a managed switch helps ensure consistent network quality by preventing broadcast storms?
- Storm control (Correct answer)
- Port mirroring
- VLAN tagging
- Link aggregation
Correct answer: Storm control
Storm control limits the rate of broadcast, multicast, and unknown unicast traffic to prevent storms that degrade network performance.
Question 6: A user reports that file transfers are slow but web browsing is fast. Which QoS configuration is the likely cause?
- HTTP traffic is prioritized over file transfer (SMB/FTP) traffic (Correct answer)
- DNS is resolving hostnames incorrectly
- The DHCP server is assigning duplicate IPs
- The switch has a spanning tree misconfiguration
Correct answer: HTTP traffic is prioritized over file transfer (SMB/FTP) traffic
QoS policies that prioritize HTTP over bulk file transfer protocols will cause slow downloads while web browsing remains fast.
Question 7: When conducting a wireless site survey for quality assurance, what is the primary goal?
- Identifying coverage gaps, interference sources, and optimal AP placement (Correct answer)
- Assigning IP addresses to wireless clients
- Configuring wireless security protocols
- Updating access point firmware versions
Correct answer: Identifying coverage gaps, interference sources, and optimal AP placement
A site survey maps signal strength, identifies dead zones, and locates interference to ensure adequate wireless coverage quality.
Microsoft Networking Essentials Exam Quality Control & Assurance 5
What is the primary purpose of testing network redundancy as part of quality assurance?