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Free Practice Quiz Question List

9 Network Practice and Troubleshooting Online Quiz Questions

Use this free practice quiz with 20 questions to review 9 Network Practice and Troubleshooting, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: If traffic uses TCP port 22, that alone proves the traffic is an SSH connection.

  1. A

    True

  2. B

    False

02
True or false
1 point

True or false: A failed ping proves that the destination or network path is broken.

  1. A

    True

  2. B

    False

03
Fill in the blank
1 point

SSH commonly uses TCP port . The ping command uses , not a TCP or UDP port.

04
Choose one
1 point

A computer can reach a website by its IP address but not by its domain name. Which is the most relevant first investigation?

  1. A

    Investigate the computer's DNS server and test name resolution.

  2. B

    Replace the router because it cannot forward IP packets.

  3. C

    Check only the website's physical cable connection.

  4. D

    Change the computer's MAC address.

05
Written response
1 point

For host 192.168.10.77/26, what is the network address?

06
Choose one
1 point

A cable is connected to a computer, but the switch port shows no link light. Which OSI layer should you investigate first?

  1. A

    Application

  2. B

    Physical

  3. C

    Transport

  4. D

    Network

07
Fill in the blank
1 point

In the practical TCP/IP-to-OSI mapping, TCP/IP application functions commonly span OSI layers , while TCP/IP transport corresponds roughly to OSI layer .

08
Choose one
1 point

A computer can reach a host on its own subnet but cannot reach a server on another subnet. What is the most sensible next check?

  1. A

    Inspect the host's subnet mask and default gateway, then check router routes.

  2. B

    Change the host's DNS server before checking its IP configuration.

  3. C

    Replace the local switch because switches route all traffic between IP networks.

  4. D

    Change the host's MAC address to match the remote server.

09
Choose all
1 point

A host can reach its gateway, but attempts to reach a known remote IP address fail. Select all relevant areas to investigate next.

  1. A

    Routing

  2. B

    Firewall rules

  3. C

    The provider path

  4. D

    DNS name resolution

10
Choose one
1 point

What is the broadcast address for the subnet containing host 192.168.10.77/26?

  1. A

    192.168.10.64

  2. B

    192.168.10.77

  3. C

    192.168.10.127

  4. D

    192.168.10.126

11
Open ended
1 point

A user can reach a service by its IP address, but not by its domain name. Describe a sensible troubleshooting sequence and explain what the results would indicate.

12
Choose one
1 point

A laptop has Wi-Fi signal but receives an address beginning 169.254 and cannot reach its gateway. Which is the most sensible initial check?

  1. A

    Check Wi-Fi association and DHCP configuration.

  2. B

    Change the browser's DNS cache only.

  3. C

    Replace the host's application software.

  4. D

    Set the default gateway to the broadcast address.

13
Choose one
1 point

Two computers on the same local Ethernet network need to exchange traffic. Which function is a Layer 2 switch most likely to perform?

  1. A

    A switch forwards IP packets between networks using routes.

  2. B

    A switch commonly forwards local Ethernet frames using MAC addresses.

  3. C

    A switch assigns IP configuration to clients.

  4. D

    A switch converts domain names into IP addresses.

14
True or false
1 point

In the practical TCP/IP-to-OSI mapping, TCP/IP application functions correspond only to OSI layer 7.

  1. A

    True

  2. B

    False

15
Written response
1 point

In a network design, devices provide services directly to one another instead of relying on a server to provide those services. What is this architecture called?

16
Choose one
1 point

Which address is within an IPv4 private address range?

  1. A

    172.14.5.4

  2. B

    172.32.5.4

  3. C

    172.20.5.4

  4. D

    192.0.2.4

17
Written response
1 point

A subnet with CIDR prefix /26 contains how many total IPv4 addresses, including the network and broadcast addresses?

18
Choose one
1 point

For the TCP encapsulation example, which sequence correctly shows the data as it moves from a browser toward transmission over a local network?

  1. A

    Application data → IP packet → TCP segment → Ethernet or Wi-Fi frame

  2. B

    TCP segment → application data → Ethernet or Wi-Fi frame → IP packet

  3. C

    Application data → TCP segment → IP packet → Ethernet or Wi-Fi frame

  4. D

    Ethernet or Wi-Fi frame → IP packet → TCP segment → application data

19
Choose all
1 point

An office LAN has wired computers and Wi-Fi clients connected through an access point. Which statements correctly describe this arrangement? Select all that apply.

  1. A

    The access point commonly bridges Wi-Fi clients to the wired LAN.

  2. B

    Wired Ethernet and Wi-Fi cannot be part of the same LAN.

  3. C

    Wireless clients share the radio capacity of their access point.

  4. D

    Wi-Fi signals travel through copper cable.

20
Written response
1 point

A router forwards a packet onto the destination LAN. What type of address is used for delivery to the next interface on that local link?