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Free Practice Quiz Question List

7 Network Troubleshooting Online Quiz Questions

Use this free practice quiz with 20 questions to review 7 Network Troubleshooting, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

A successful ping to a server proves that the required application is reachable and working. True or false?

  1. A

    True

  2. B

    False

02
Choose one
1 point

A user can reach an internal service by its IP address but not by its hostname. Which check is the most relevant next step?

  1. A

    Replace the endpoint's network adapter

  2. B

    Check the client's DNS server and query response

  3. C

    Increase the subnet mask

  4. D

    Disable the firewall as an informal test

03
Fill in the blank
1 point

When investigating an off-subnet connectivity failure, check the host's IP address, subnet mask, and before moving on to routing and filtering.

04
Written response
1 point

What is the name of the OSI troubleshooting approach that tests a useful middle point and then works in either direction?

05
Choose one
1 point

A targeted test produces a result that disproves your theory of the fault. What should you do next?

  1. A

    Keep changing settings until the symptoms stop

  2. B

    Apply the most disruptive likely fix immediately

  3. C

    Form another theory or escalate based on the evidence

  4. D

    Assume the test tool is faulty and stop documenting

06
Fill in the blank
1 point

Document symptoms, scope, tests, results, changes, verification, and learned so future diagnosis can benefit from the outcome.

07
Choose one
1 point

An endpoint has an IPv4 address in the 169.254.0.0/16 range. Which interpretation is most appropriate?

  1. A

    Investigate why the client did not obtain its expected DHCP configuration

  2. B

    Assume the destination application is down

  3. C

    Treat the address as proof of a duplicate IP address

  4. D

    Change the DNS record before checking the client's address

08
Choose all
1 point

Select all statements that correctly define a network performance measure.

  1. A

    Bandwidth is network capacity

  2. B

    Latency is variation in delay

  3. C

    Throughput is the rate actually achieved

  4. D

    Packet loss is the amount of delay variation

  5. E

    Jitter is variation in delay

09
Written response
1 point

How many connection stages are listed for diagnosing a wireless fault, from discovery through access to the intended service? Enter an integer.

10
True or false
1 point

Temporarily weakening a firewall or other security control is an appropriate informal troubleshooting test if it might reveal the cause.

  1. A

    True

  2. B

    False

11
Choose one
1 point

A switch interface's CRC error counter is rising. Which conclusion is best supported by this evidence?

  1. A

    The DNS server is necessarily returning an incorrect record

  2. B

    The DHCP scope is necessarily exhausted

  3. C

    The destination application is necessarily rejecting connections

  4. D

    A cabling, interference, duplex, or hardware problem may be present

12
Choose all
1 point

Select all observations that make a shared infrastructure or policy fault more plausible than a fault isolated to one endpoint.

  1. A

    Several affected devices share the same access point

  2. B

    One endpoint has a failing adapter while nearby users are unaffected

  3. C

    One user reports a problem with an unrelated local application

  4. D

    Users across a site report the same service failure

13
Choose one
1 point

Wireless reliability is worse in some areas of an office than in others. Which tool can help assess whether channel use is contributing to the problem?

  1. A

    A cable tester to measure the wireless channel

  2. B

    A Wi-Fi analyzer to assess channel use

  3. C

    A DNS lookup to identify adjacent-channel overlap

  4. D

    A route table display to measure client airtime

14
Open ended
1 point

A user reports that one application is slow at certain times, while other services appear normal. Describe a troubleshooting plan that would define the problem, gather evidence to narrow its location, and evaluate whether a change improves performance.

15
Choose one
1 point

A test produces a result that disproves your theory about the cause of a network fault. What should you do next?

  1. A

    Continue changing settings until the issue disappears.

  2. B

    Form another theory or escalate based on the evidence.

  3. C

    Apply the most common fix for that symptom.

  4. D

    Close the issue because the test did not reproduce it.

16
True or false
1 point

True or false: If a ping to a destination fails, the intended application is necessarily unreachable.

  1. A

    True

  2. B

    False

17
Written response
1 point

A client can reach a service by its IP address but not by its hostname. Which protocol should you investigate first?

18
Choose one
1 point

A client receives an IPv4 address in the 169.254.0.0/16 range. What is the most useful initial interpretation?

  1. A

    The client has confirmed that its DHCP configuration is correct.

  2. B

    The default gateway is necessarily reachable.

  3. C

    The client may not have obtained its expected DHCP configuration.

  4. D

    The network has confirmed that the address is unique.

19
Choose one
1 point

Users report that a wireless connection is reliable in one part of a building but unreliable in another. Which investigation best fits this location-dependent symptom?

  1. A

    Change every client’s credentials before checking the wireless environment.

  2. B

    Investigate distance, obstructions, roaming behavior, and interference.

  3. C

    Assume the destination service is down because the connection varies by location.

  4. D

    Disable the wireless security mode as an informal test.

20
Written response
1 point

Which troubleshooting approach starts at a useful middle point and then works in either direction?