Microsoft Networking Essentials Exam Quality Control & Assurance 2 — Questions and Answers
Question 1: Which metric best measures the reliability of a network connection over time?
- Packet loss percentage (Correct answer)
- IP address count
- Number of connected devices
- Router firmware version
Correct answer: Packet loss percentage
Packet loss percentage directly measures how reliably data is delivered across a network connection.
Question 2: A network administrator notices intermittent connectivity issues. Which QoS mechanism should be reviewed first?
- Traffic shaping policies (Correct answer)
- DNS server settings
- DHCP lease duration
- MAC address table
Correct answer: Traffic shaping policies
Traffic shaping policies control bandwidth allocation and can cause intermittent issues if misconfigured.
Question 3: What does a high jitter value indicate about network quality?
- Inconsistent packet delivery timing (Correct answer)
- High overall throughput
- Low bandwidth utilization
- Stable round-trip time
Correct answer: Inconsistent packet delivery timing
High jitter means packet arrival times vary significantly, degrading real-time applications like VoIP.
Question 4: Which Windows tool provides a baseline network performance report for quality assurance purposes?
- Windows Network Diagnostics (Correct answer)
- Device Manager
- Registry Editor
- Disk Cleanup
Correct answer: Windows Network Diagnostics
Windows Network Diagnostics identifies and reports network configuration and performance issues.
Question 5: In QoS configuration, what does DSCP (Differentiated Services Code Point) primarily control?
- Packet prioritization in the network (Correct answer)
- IP address assignment
- DNS resolution order
- Wireless channel selection
Correct answer: Packet prioritization in the network
DSCP marks packets with priority levels so routers and switches can forward critical traffic first.
Question 6: A technician runs a ping test and observes 'Request Timed Out' responses. What does this most likely indicate?
- The destination host is unreachable or blocking ICMP (Correct answer)
- The source computer has a bad NIC
- DNS is resolving incorrectly
- The gateway IP is misconfigured
Correct answer: The destination host is unreachable or blocking ICMP
Request Timed Out means no ICMP reply arrived, indicating the host is down, unreachable, or filtering pings.
Question 7: Which standard defines Quality of Service for Ethernet networks at Layer 2?
- IEEE 802.1p (Correct answer)
- IEEE 802.11n
- IEEE 802.3u
- IEEE 802.1X
Correct answer: IEEE 802.1p
IEEE 802.1p defines traffic class expediting and dynamic multicast filtering using priority bits in Ethernet frames.
Microsoft Networking Essentials Exam Quality Control & Assurance 2
Which metric best measures the reliability of a network connection over time?