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Free Practice Quiz Question List

3 IP Addressing and Subnets Online Quiz Questions

Use this free practice quiz with 20 questions to review 3 IP Addressing and Subnets, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: Each decimal octet in an IPv4 address can range from 0 to 255.

  1. A

    True

  2. B

    False

02
Fill in the blank
1 point

An IPv4 address contains bits, grouped into four decimal .

03
Written response
1 point

What dotted-decimal subnet mask corresponds to a /24 prefix?

04
Choose one
1 point

How many total IPv4 addresses are in a /26 subnet?

  1. A

    32

  2. B

    64

  3. C

    62

  4. D

    128

05
Choose all
1 point

Select all IPv4 ranges reserved for private networks.

  1. A

    10.0.0.0/8

  2. B

    172.16.0.0/12

  3. C

    192.168.0.0/16

  4. D

    172.32.0.0/12

  5. E

    192.167.0.0/16

06
True or false
1 point

True or false: Because a router uses NAT, a private IPv4 address becomes globally unique on the public Internet.

  1. A

    True

  2. B

    False

07
Fill in the blank
1 point

In a typical IPv4 subnet, the first address identifies the , and the last address is the .

08
Written response
1 point

A typical /26 subnet uses the conventional rule that reserves its first and last addresses. How many usable host addresses does it have?

09
Choose one
1 point

Which is the subnet address for the device configured as 192.168.10.25/24?

  1. A

    192.168.10.25

  2. B

    192.168.10.0

  3. C

    192.168.10.1

  4. D

    192.168.10.255

10
Choose one
1 point

A device at 192.168.10.25/24 needs to reach a destination it determines is outside its local subnet. What should it do with the traffic?

  1. A

    Send it to the configured default gateway

  2. B

    Send it to the broadcast address

  3. C

    Send it directly to the remote destination as though it were local

  4. D

    Send it to the DHCP pool

11
Choose all
1 point

You are planning address space for an organization that may connect to a remote office by VPN. Select all practices supported by sound IPv4 address planning.

  1. A

    Use distinct, non-overlapping ranges for subnets

  2. B

    Reserve addresses for gateways and devices that need stable addresses

  3. C

    Keep dynamically assigned DHCP addresses in a separate pool

  4. D

    Check that the range does not conflict with a remote office or VPN

  5. E

    Reuse overlapping ranges for networks that may connect

12
Written response
1 point

For 192.168.10.25/24, what is the subnet's network address? Enter it in dotted-decimal form.

13
Choose one
1 point

Which task can a DHCP server perform for client devices on a network?

  1. A

    It translates a subnet prefix into a public address

  2. B

    It can distribute an address, subnet mask, and gateway to client devices

  3. C

    It identifies which addresses are broadcast addresses

  4. D

    It assigns public addresses directly to all private devices

14
Open ended
1 point

An office needs addresses for 50 host interfaces and has no requirement for additional growth capacity. Choose either a /26 or a /24 subnet. Which is the smaller suitable choice, and why?

15
True or false
1 point

A DHCP server can automatically provide a client with its IP address, subnet mask, and default-gateway settings.

  1. A

    True

  2. B

    False

16
Choose one
1 point

Which subnet mask corresponds to the CIDR prefix /24?

  1. A

    255.255.0.0

  2. B

    255.255.255.0

  3. C

    255.255.255.128

  4. D

    255.0.0.0

17
Choose one
1 point

An organization needs globally unique IPv4 addresses for Internet routing. From whom does it generally obtain them?

  1. A

    A local DHCP server

  2. B

    A device's default gateway

  3. C

    An Internet service provider or another address-allocation authority

  4. D

    Any organization that chooses an unused private address

18
Choose one
1 point

How should the IPv4 address 172.20.8.4 be classified?

  1. A

    It is public because all addresses beginning with 172 are public.

  2. B

    It is private because it falls within 172.16.0.0–172.31.255.255.

  3. C

    It is private only if a router translates it.

  4. D

    It is a broadcast address.

19
Choose one
1 point

A home router uses NAT for devices on its private network. What is a common purpose of this arrangement?

  1. A

    It lets devices with private addresses access Internet services.

  2. B

    It turns a subnet mask into a public address.

  3. C

    It assigns every device a globally unique private address.

  4. D

    It replaces the need for a default gateway.

20
Written response
1 point

How many total IPv4 addresses are in a /26 subnet? Enter the number only.