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Free Practice Quiz Question List

6 Diagnosing Network Problems Online Quiz Questions

Use this free practice quiz with 20 questions to review 6 Diagnosing Network Problems, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: A lit link indicator on a wired device proves that the network connection is error-free.

  1. A

    True

  2. B

    False

02
True or false
1 point

If devices can communicate locally through a router, the router's internet-facing connection must also be working.

  1. A

    True

  2. B

    False

03
Choose one
1 point

Several users report that a network service is unavailable. Before testing individual components, what is the most useful first step?

  1. A

    Replace the router immediately.

  2. B

    Determine whether the symptom affects one device, several devices, or the whole network.

  3. C

    Assign a random static IP address to the affected device.

  4. D

    Clear the DNS cache on every device.

04
Choose one
1 point

A laptop shows that it is connected to Wi-Fi, but it cannot reach network resources. What is the best next diagnostic step?

  1. A

    Assume the access point is faulty and replace it.

  2. B

    Disable authentication on the wireless network.

  3. C

    Check IP settings, DNS, and the network path.

  4. D

    Move the device farther from the access point.

05
Choose one
1 point

A tracert -d test shows no response from one intermediate hop, but an application still reaches its destination. What is a reasonable interpretation?

  1. A

    The destination service is definitely down.

  2. B

    The router may be suppressing or deprioritizing the probes.

  3. C

    The network cable is definitely damaged.

  4. D

    The route cannot forward any traffic beyond that hop.

06
Fill in the blank
1 point

On Windows, nslookup queries the configured DNS server rather than relying on the client’s .

07
Fill in the blank
1 point

When comparing packet-loss tests, loss already present on the local segment points closer to the device or .

08
Written response
1 point

A Windows IPv4 adapter has an address beginning with 169.254. What type of address did the device commonly fail to obtain?

09
Written response
1 point

Which Windows command clears the local DNS cache?

10
Choose all
1 point

A user reports intermittent slow performance. Which actions can help narrow down where or when the problem occurs? Select all that apply.

  1. A

    Compare performance on more than one device.

  2. B

    Replace the access point before comparing any results.

  3. C

    Compare wired and wireless performance when possible.

  4. D

    Repeat tests at different times and locations.

11
Choose all
1 point

An IP-based test to a destination works, but accessing it by host name fails and a DNS query times out. Which checks are appropriate? Select all that apply.

  1. A

    Inspect which DNS server is configured.

  2. B

    Conclude from the timeout alone that the DNS server is faulty.

  3. C

    Check whether the DNS server is reachable.

  4. D

    Check the queried DNS record.

12
Open ended
1 point

A computer can communicate on its local network, but one remote application is unavailable. Describe a sequence of tests that would help distinguish a name-resolution problem, a routing problem, and a failure specific to the application.

13
Choose one
1 point

A wired device appears connected, but it cannot reach other devices on the intended LAN. Which switch-focused check is most useful?

  1. A

    Assume that an active link indicator proves the VLAN is correct.

  2. B

    Assign a random static address to the device.

  3. C

    Check the port status and configuration, including whether the device is on the intended VLAN.

  4. D

    Clear the device's DNS cache.

14
True or false
1 point

True or false: A successful ping to the default gateway proves that every network service and the internet are reachable.

  1. A

    True

  2. B

    False

15
Written response
1 point

What IPv4 address prefix on a Windows adapter commonly indicates that the device did not obtain a DHCP address?

16
Written response
1 point

Which Windows command queries DNS for the host name example.com?

17
Choose one
1 point

Devices can communicate on the local network, but none can reach the internet. Which check is most directly indicated?

  1. A

    Replace every device's network adapter.

  2. B

    Check the router's WAN connection and configuration.

  3. C

    Change all devices to random static IP addresses.

  4. D

    Clear the DNS cache on one device.

18
Choose one
1 point

A laptop is authenticated to Wi-Fi and shows as connected, but network access still fails. What is the best next troubleshooting step?

  1. A

    Assume the internet service is working because Wi-Fi says connected.

  2. B

    Re-enter the Wi-Fi password without checking anything else.

  3. C

    Check the device's IP settings, DNS, and network path.

  4. D

    Replace the access point immediately.

19
Choose one
1 point

After correcting a connection or DHCP issue, which Windows command sequence can help a DHCP-configured device obtain a renewed lease?

  1. A

    ipconfig /release followed by ipconfig /renew

  2. B

    ipconfig /flushdns followed by ipconfig /all

  3. C

    ping 127.0.0.1 followed by ping <default-gateway-address>

  4. D

    nslookup example.com followed by tracert -d <destination>

20
Choose one
1 point

A wired device remains disconnected after its cable has been reseated. Which approach best helps isolate whether the cable or switch port is faulty?

  1. A

    Assign the device a random static IP address.

  2. B

    Disable the switch and replace it immediately.

  3. C

    Change the cable, port, and device configuration all at once.

  4. D

    Test with a known-good cable and another port, changing one thing at a time.