CCNA 200-125 And CCENT Practice Pack Subnetting Success! Set 3

You're subnetting the 217.4.31.0 network.   You first want to create a subnet large enough for at least 40 users, and then a second subnet that will be used on link with only two users.   Putting VLSM into action and using as few addresses as possible, which two of the following subnets should you use?


Options are :

  • 217.4.32.0 255.255.255.252
  • 217.4.31.0 255.255.255.0
  • 217.4.31.0 255.255.255.192
  • 217.4.31.0 255.255.255.224
  • 217.4.31.64 255.255.255.252

Answer :217.4.31.0 255.255.255.192 217.4.31.64 255.255.255.252

CCNA ICND1 Test

You've subnetted the 14.0.0.0 network with a /12 mask.  The first subnet created is 14.0.0.0, naturally.  What are the second and third subnets created with this mask?


Options are :

  • 14.16.0.0
  • 14.32.0.0
  • 14.48.0.0
  • 14.8.0.0
  • 14.40.0.0
  • 14.24.0.0

Answer :14.16.0.0 14.32.0.0

Identify the two true statements regarding this address:  132.16.22.222 /21.


Options are :

  • The broadcast address for this address's subnet is 132.16.255.255 /21.
  • This address is on the 132.16.16.0 /21 subnet.
  • This address is on the 132.8.16.0 /21 subnet.
  • The broadcast address for this address's subnet is 132.16.23.255 /21.
  • The broadcast address for this address's subnet is 132.8.16.255 /21.
  • This address is on the 132.16.8.0 /21 subnet.

Answer :This address is on the 132.16.16.0 /21 subnet. The broadcast address for this address's subnet is 132.16.23.255 /21.

Analyze the addresses of these four hosts and identify the two true statements.   All addresses have a 255.255.240.0 mask.

Host A:  140.4.32.255

Host B:  140.4.46.1

Host C:  140.4.48.255

Host D:  140.4.62.254


Options are :

  • Hosts B and C share a subnet.
  • Hosts C and D share a subnet.
  • Hosts A, C, and D share a subnet.
  • Hosts A, B, and C share a subnet.
  • Hosts A and C share a subnet.
  • Hosts A and B share a subnet.

Answer :Hosts C and D share a subnet. Hosts A and B share a subnet.

QA : CCNA Cyber Ops - SECOPS # 210-255

The major network number 180.1.0.0 has been subnetted with a 255.255.240.0 mask.   The first subnet is 180.1.0.0 255.255.240.0; what are the second and third subnets?


Options are :

  • 180.1.128.0 /20
  • 180.1.32.0 /21
  • 180.1.64.0 /21
  • 180.1.32.0 /20
  • 180.1.16.0 /21
  • 180.1.192.0 /20
  • 180.1.16.0 /20
  • 180.1.64.0 /20

Answer :180.1.32.0 /20 180.1.16.0 /20

Which three of the following addresses are on the 142.89.0.0 255.255.248.0 subnet?


Options are :

  • 142.89.5.43
  • 142.89.8.45
  • 142.89.11.1
  • 142.89.9.9
  • 142.89.7.222
  • 142.89.6.111

Answer :142.89.5.43 142.89.7.222 142.89.6.111

Which four of the following are acceptable host addresses from any subnet that results from subnetting 230.1.1.0 with a 255.255.255.248 mask?


Options are :

  • 230.1.1.12
  • 230.1.1.31
  • 230.1.1.15
  • 230.1.1.16
  • 230.1.1.6
  • 230.1.1.22
  • 230.1.1.8
  • 230.1.1.30

Answer :230.1.1.12 230.1.1.6 230.1.1.22 230.1.1.30

QA : CCNA Cyber Ops - SECOPS # 210-255

What is the broadcast address for the subnet 19.8.0.0 255.254.0.0?


Options are :

  • 19.8.255.254
  • 19.14.255.255
  • 19.9.255.255
  • 19.8.255.255
  • 19.9.255.254
  • 19.16.255.255
  • 19.12.255.255
  • 19.24.255.255

Answer :19.9.255.255

Which of the following are broadcast addresses from the subnets of 212.14.13.0 /30?


Options are :

  • 212.14.13.15
  • 212.14.13.11
  • 212.14.13.8
  • 212.14.13.16
  • 212.14.13.21
  • 212.14.13.12
  • 212.14.13.7

Answer :212.14.13.15 212.14.13.11 212.14.13.7

You're performing VLSM and are considering which mask to use for the link between R1 and R2.   Which of these masks is the best fit?


Options are :

  • 255.255.255.250
  • 255.255.255.248
  • 255.255.255.252
  • 255.255.255.251
  • 255.255.255.255

Answer :255.255.255.252

Test : CCNA Cyber Ops - SECOPS # 210-255

Upon what subnet will you find a host assigned the 147.3.72.200 /19 address?


Options are :

  • 147.3.64.0 /19
  • 147.3.32.0 /19
  • 147.3.96.0 /19
  • 147.3.0.0 /19
  • 147.3.80.0 /19

Answer :147.3.64.0 /19

You're subnetting a Class B network and want to allow for the most subnets possible on the segment leading from R1 to the network with 75 hosts.   Which of these masks is the best choice?




Options are :

  • /25
  • /26
  • /29
  • /28
  • /27
  • /24

Answer :/25

Identify the potential issue, if any, with this addressing scheme.



Options are :

  • The addresses shown are on different subnets.
  • One of the devices is using an illegal address.
  • Both devices are using an illegal address.
  • There is no potential issue with this subnet.

Answer :Both devices are using an illegal address.

QA : CCNA Cyber Ops - SECOPS # 210-255

Identify the potential issue, if any, with the addressing shown here.




Options are :

  • The subnet masks do not match.
  • Host A has been assigned the broadcast address for this subnet.
  • There is no issue with this addressing.
  • Host A's address is on a different subnet than Router A's Fast 0/0 interface.

Answer :Host A has been assigned the broadcast address for this subnet.

I tried to apply this particular address to R2's Fast 0/0 interface, and you can see the results here.  What's the issue?



Options are :

  • This is the first address in this particular subnet, and you can't use that address on a host.
  • Subnetted addresses cannot be assigned to Cisco router Ethernet-based interfaces.
  • This is the last address in this particular subnet, and you can't assign that address to a host.
  • Private networks cannot be subnetted.

Answer :This is the first address in this particular subnet, and you can't use that address on a host.

What is the broadcast address for the 217.3.2.64 255.255.255.192 subnet?


Options are :

  • 217.3.2.192
  • 217.3.2.127
  • 217.3.2.128
  • 217.3.2.255
  • 217.255.255.255
  • 217.3.255.255

Answer :217.3.2.127

CCNA ICND1 Test

The IP addresses 211.200.189.155 /27 and 211.200.189.159 have been assigned to two hosts in your network.   Identify the true statements regarding these addresses.


Options are :

  • One address is the subnet number itself for that particular subnet.
  • Both addresses can be assigned to hosts with no issues.
  • The addresses are on two different subnets.
  • One address is the broadcast address for that particular subnet.
  • Both addresses are from the same subnet.

Answer :One address is the broadcast address for that particular subnet. Both addresses are from the same subnet.

What is the broadcast address for the 10.32.0.0 255.224.0.0 subnet?


Options are :

  • 10.49.255.255
  • 10.63.255.255
  • 10.192.255.255
  • 10.31.255.255
  • 10.127.255.255

Answer :10.63.255.255

Identify the potential issue, if any, with the subnetting scheme shown here.



Options are :

  • Host A has been assigned the broadcast address for this particular subnet.
  • There are no issues with this addressing.
  • The subnet masks do not match.
  • Host A is on a different subnet than Router A's Fast 0/0 interface.

Answer :Host A is on a different subnet than Router A's Fast 0/0 interface.

Mock : CCNA Cyber Ops - SECOPS # 210-255

Identify the issue with this addressing scheme, if any.



Options are :

  • Router A has been assigned an unusable host address on this subnet.
  • Host A has been assigned the broadcast address for this subnet.
  • There is no problem with this addressing scheme.
  • Host A has been assigned an address on a separate subnet from that of Router A's Fast 0/0 interface.

Answer :There is no problem with this addressing scheme.

Subnetting 217.3.1.0 with a /27 mask results in the creation of eight subnets.  The first one, naturally, is 217.3.1.0 /27.   What are the second and third subnets created?


Options are :

  • 217.3.1.48
  • 217.3.1.64
  • 217.3.1.96
  • 217.3.1.16
  • 217.3.1.32
  • 217.3.1.80

Answer :217.3.1.64 217.3.1.32

What issues does this addressing scheme present (if any?)



Options are :

  • There is no issue with this configuration.
  • Host A is using the broadcast address for its subnet.
  • The subnet masks don't match.
  • Router A is using the broadcast address for its subnet.

Answer :The subnet masks don't match.

Test : CCNA Cyber Ops - SECOPS # 210-255

Analyze the following four host addresses and select the three true statements.   All hosts are using a 255.255.224.0 mask.

Host A:  128.3.32.127

Host B:  128.3.70.111

Host C:  128.3.94.248

Host D:  128.3.97.89


Options are :

  • Host D does not share a subnet with any other host.
  • Host A does not share a subnet with any other host.
  • Hosts A and B share a subnet.
  • Host B does not share a subnet with any other host.
  • Host C does not share a subnet with any other host.
  • Hosts B and C share a subnet.
  • Hosts C and D share a subnet.

Answer :Host D does not share a subnet with any other host. Host A does not share a subnet with any other host. Hosts B and C share a subnet.

What dotted decimal mask is represented by the prefix notation value /25?


Options are :

  • 255.255.255.192
  • 255.255.255.128
  • 255.255.255.240
  • 255.255.255.224
  • 255.255.255.0

Answer :255.255.255.128

Identify the true statements regarding this network:  192.1.1.0  255.255.255.252


Options are :

  • The prefix notation equivalent of this mask is /28.
  • This is a good subnet to use for router interfaces on an OSPF broadcast network with one DR, one BDR, and two DROthers.
  • In prefix notation, that mask is expressed as /30.
  • This would be an appropriate subnet for a point-to-point link.
  • This subnet contains two usable IP host addresses.
  • This subnet contains four usable IP host addresses.

Answer :In prefix notation, that mask is expressed as /30. This would be an appropriate subnet for a point-to-point link. This subnet contains two usable IP host addresses.

CCNA ICND1 Certification

What is the last address on the 80.0.0.0 /11 subnet that can be assigned to a host?


Options are :

  • 80.63.254.255
  • 80.63.255.254
  • 80.191.255.254
  • 80.191.255.255
  • 80.31.255.254
  • 80.31.254.255

Answer :80.31.255.254

Which two of these statements accurately descibes the addresses 110.90.1.255 255.192.0.0 and 110.96.0.1 /10?


Options are :

  • They are on the same subnet.
  • Neither address is acceptable for use as a host address.
  • Only one address is acceptable for usage as a host address.
  • They are both acceptable for usage as host addresses.
  • They are on different subnets.

Answer :They are on the same subnet. They are both acceptable for usage as host addresses.

You're subnetting the 189.77.0.0 network for a client at least 30 subnets and at least 1000 valid host addresses per subnet.  Which two of the following masks will accomplish this?


Options are :

  • 255.255.248.0
  • 255.255.252.0
  • 255.255.254.0
  • 255.255.255.0
  • 255.255.240.0
  • 255.255.255.128

Answer :255.255.248.0 255.255.252.0

Mock : CCNA Cyber Ops - SECOPS # 210-255

Which three of the following are subnets created by subnetting the 211.4.3.0 network with a 255.255.255.240 mask?


Options are :

  • 211.4.3.56 /28
  • 211.4.3.24 /28
  • 211.4.3.48 /28
  • 211.4.3.8 /28
  • 211.4.3.32 /28
  • 211.4.3.40.0 /28
  • 211.4.3.16 /28

Answer :211.4.3.48 /28 211.4.3.32 /28 211.4.3.16 /28

Your client's wondering why he's having trouble with connectivity between two newly configured hosts.  He suspects the problem is in the addressing.  One host's address is 70.37.0.1; the other's is 70.46.255.255.  The mask for both is /12.   Which of the following statements best describes the situation?


Options are :

  • Both hosts are using illegal addresses, so that is likely the issue.
  • The hosts have legal addresses but are not on the same subnet, so that's likely the issue.
  • The issue must be elsewhere; both hosts are on the same subnet and these are both legal addresses to assign to hosts.
  • Both hosts are on the same subnet, but one is using an address from that subnet that it shouldn't use, so that is likely the issue.

Answer :The issue must be elsewhere; both hosts are on the same subnet and these are both legal addresses to assign to hosts.

Your client would like you to subnet the 211.14.32.0 subnet so there are at least 20 subnets and a minimum of 6 hosts per subnet. Which of the following masks is your best choice?


Options are :

  • /29, which exceeds both minimums
  • /27, which hits both of the minimums exactly
  • /28, which hits both of the minimums exactly
  • /28, which exceeds one minimum and meets the other exactly
  • /29, which exceeds one minimum and meets the other exactly
  • /28, which exceeds both minimums

Answer :/29, which exceeds one minimum and meets the other exactly

CCNA ICND1 Certification Exam

Using a Class B network, your client would like you to come up with a subnetting scheme that allows for at least 200 subnets and between 100 - 150 host addresses per subnet.   Which of these masks will get the job done?


Options are :

  • /28
  • /26
  • /27
  • /24
  • /25
  • /23

Answer :/25

You've been tasked to subnet a Class B network so that at least 250 subnets are available and no less than 15 users per subnet are allowed.  Which of the following masks would accomplish this?   (If multiple masks meet both requirements, choose that one that results in the maximum number of subnets.)


Options are :

  • 255.255.255.224
  • 255.255.255.128
  • 255.255.255.148
  • 255.255.240.0
  • 255.255.255.192

Answer :255.255.255.224

Your client would like you to subnet a Class B network to allow for a minimum of 100 subnets and the maximum number of host addresses. Which of these masks is your best bet?


Options are :

  • /21
  • /24
  • /25
  • /23
  • /26
  • /22

Answer :/23

Test : CCNA Cyber Ops - SECOPS # 210-255

You're given the 210.23.4.0 network and an odd requirement from your client.   She wants at least 55 users per subnet, but doesn't care how many subnets you end up with.  As a world-class network admin, you want as many subnets as you can get while meeting the client's requirement.   Which of the following masks is the best fit for this situation?


Options are :

  • 255.255.255.224
  • 255.255.255.192
  • 255.255.255.248
  • 255.255.255.64
  • 255.255.255.240
  • 255.255.255.128

Answer :255.255.255.192

Your client wants you to do the following:

1.  Use the 144.0.0.0 network.

2.   Allow for at least 600 subnets.

3.   Allow for at least 100 users per subnet.

Given these requirements, which of these masks will do the job?


Options are :

  • 255.255.255.192
  • 255.255.240.0
  • No mask can meet these requirements.
  • 255.255.255.224
  • 255.255.255.240
  • 255.255.224.0
  • 255.255.192.0

Answer :No mask can meet these requirements.

Your client has announced an intention to subnet a Class C network with a 255.255.255.240 subnet.   Which of the following values is accurate regarding the result of this subnetting?


Options are :

  • 16 valid hosts
  • 30 valid hosts
  • 32 valid subnets
  • 30 valid subnets
  • 14 valid host addresses per subnet
  • 16 valid subnets

Answer :14 valid host addresses per subnet 16 valid subnets

CCNA ICND1 Certification Exam

You're working with the 144.27.0.0 network.  Your client requests relatively small subnets -- each should hold at least 30 users but no more than 40.   The client has no requirement for the number of subnets.   Which of the following statements is true?


Options are :

  • The best mask to use here is 255.255.240.0.
  • The most appropriate mask to use is 255.255.255.224.
  • The correct mask will result in more than 1000 valid subnets, but fewer than 2000.
  • The mask to use here is 255.255.224.0.
  • The correct mask will result in over 2000 valid subnets.
  • The best mask for this scenario is 255.255.255.240.

Answer :The most appropriate mask to use is 255.255.255.224. The correct mask will result in over 2000 valid subnets.

The 181.3.0.0 network has been subnetted with a 255.255.128.0 mask.   How many subnets does this give you to work with?


Options are :

  • 256
  • 512
  • 1
  • 4
  • 2
  • 0

Answer :2

You're working with the 143.2.0.0 /16 network.   Your client would like you to come up with a subnetting scheme that allows for at least 250 subnets, but would like no more than 100 host addresses per subnet.   Which of the following masks will get the job done?


Options are :

  • No mask can meet both requirements.
  • 255.255.255.240
  • 255.255.255.192
  • 255.255.255.128
  • 255.255.255.224

Answer :255.255.255.192

Certification : CCNA Cyber Ops - SECOPS # 210-255

You're working with the 150.1.0.0 network.   Your client wants at least 250 subnets along with the maximum number of valid host addresses per subnet.  Which of the following statements is true?


Options are :

  • The subnet mask will give you over 1000 valid host addresses per subnet.
  • The resulting mask will give you 510 valid host addresses per subnet.
  • You'll need a minimum of 8 subnet bits.
  • You'll need a minimum of 9 subnet bits.
  • The resulting mask will give you 254 valid host addresses per subnet.
  • You'll need to borrow exactly 7 subnet bits to meet the requirement.

Answer :You'll need a minimum of 8 subnet bits. The resulting mask will give you 254 valid host addresses per subnet.

The 172.14.0.0 network has been subnetted with a 255.255.224.0 mask.   Which of the following values are true regarding the resulting number of subnets and valid IP addresses on those subnets?


Options are :

  • 200 - 400 addresses per subnet
  • 8000+ subnets
  • 8 valid subnets
  • 2000 - 4000 addresses per subnet
  • 6 valid subnets
  • 8000+ addresses per subnet

Answer :8 valid subnets 8000+ addresses per subnet

You're subnetting the 20.0.0.0 network with a /13 mask.   How many subnets does that leave you?


Options are :

  • 32
  • 30
  • 16
  • 6
  • 8
  • 14

Answer :32

Certification : CCNA Cyber Ops - SECOPS # 210-255

Given the 172.3.0.0 major network number and the following requirements from your client, which of the following masks is the best choice?

"I want no fewer than 500 users per subnet, but I don't want more than 255 subnets.  Give me as many subnets as you can up to that number, though."


Options are :

  • 255.255.255.192
  • 255.255.255.0
  • 255.255.255.128
  • 255.255.252.0
  • 255.255.248.0
  • 255.255.254.0

Answer :255.255.254.0

You're consulting with a client and she mentions that her Class B network should be subnetted to allow at least 1000 subnets.   She's not sure what the number of users per subnet could be with that many subnets.    How many valid user addresses per subnet should you tell her she'll have?


Options are :

  • 30
  • 256
  • 64
  • 126
  • 62
  • 128
  • 32
  • 254

Answer :62

A client wants you to subnet his Class C network.  The mask must allow for a minimum of 28 subnets and a maximum of 5 hosts per subnet.  Which of these masks will do the trick?


Options are :

  • 255.255.255.248
  • 255.255.255.252
  • These requirements can't be met with any mask.
  • 255.255.255.192
  • 255.255.255.255
  • 255.255.255.240
  • 255.255.255.224

Answer :255.255.255.252

CCNA ICND1 Test

How many network bits must you borrow in order to create 1000 valid subnets?


Options are :

  • 12
  • 10
  • 13
  • You don't borrow network bits to subnet.
  • 14
  • 11

Answer :You don't borrow network bits to subnet.

You've been given a Class C network to subnet.  Your client requests the final scheme allow for anywhere from 30 to 65 valid hosts.  Curiously, the client gave you no minimum or maximum requirement for the number of subnets.  Which two of the following masks would meet the requirement?


Options are :

  • 255.255.255.224
  • 255.255.255.128
  • 255.255.255.0
  • 255.255.255.240
  • 255.255.255.192
  • 255.255.255.248

Answer :255.255.255.224 255.255.255.192

You're working with a Class B network.  Your client wants as many subnets as possible while leaving between 250 and 550 valid host addresses per subnet.  Which of these masks is your best choice?


Options are :

  • 255.255.255.224
  • 255.255.255.0
  • 255.255.255.192
  • 255.255.255.128
  • No mask can result in meeting both client requirements.

Answer :255.255.255.0

CCNA Cyber Ops - SECFND # 210-250

The 126.0.0.0 network has been subnetted with a /17 mask.   As a result, how many valid subnets do you have to work with?


Options are :

  • 254
  • 4
  • 256
  • 2
  • 512
  • 510

Answer :512

Having subnetted the 172.14.0.0 network with a 255.255.255.224 mask, how many valid host IP addresses are you left with?


Options are :

  • None of these answers is correct.
  • 62
  • 128
  • 126
  • 32
  • 30
  • 64

Answer :30

A client presents you with a Class C network and these two requirements -- at least 30 subnets and at least 10 users per subnet.   What mask will do the job?


Options are :

  • No mask can meet this requirement.
  • 255.255.255.240
  • 255.255.255.192
  • 255.255.255.252
  • 255.255.255.224
  • 255.255.255.248

Answer :No mask can meet this requirement.

CCNA ICND1 Test

You have a client with a unique request.  He'd like you to subnet his Class A network so he'll have 8000 subnets to work with while maximizing the number of host addresses per subnet.  Which of these masks is the best fit?


Options are :

  • 255.255.240.0
  • 255.255.248.0
  • 255.255.255.240
  • 255.255.255.248.0
  • 255.255.224.0
  • 255.255.255.224

Answer :255.255.248.0

Given the network number 192.17.14.0 and a client requirement of a minimum of six subnets and the maximum amount of host addresses per subnet, which of the following masks is your best choice?


Options are :

  • /26
  • /27
  • /25
  • /18
  • /28
  • /20

Answer :/27

Your client wants you to subnet a Class A network with a mask that allows at least 60 subnets. The client wants as many host addresses per subnet as possible.    Which of the following masks is your best choice?


Options are :

  • /15
  • /13
  • /12
  • /16
  • /14

Answer :/14

CCNA ICND1 Certification Exam

Using a Class C network, your client has requested a subnetting scheme allowing for at least 15 subnets and at least 10 valid IP addresses per subnet.   As the senior network admin, you've delegated this task to a not-so-senior admin.  That admin comes to you with a proposal to use a mask of 255.255.255.248.    What is your response?


Options are :

  • "Looks good to me, you've met both requirements."
  • "This is the Kobayashi Maru of subnetting; you can't meet those requirements with any mask."
  • "You're close, but not quite there. Try borrowing one less subnet bit."
  • "You're very close; if you borrow one more subnet bit I think you'll have it."

Answer :"You're close, but not quite there. Try borrowing one less subnet bit."

The 181.14.0.0 network has been subnetted with a /22 mask.   Which of the following correctly indicates how many subnets you now have?


Options are :

  • 126
  • 128
  • 62
  • 64
  • 30
  • 32

Answer :64

Given the 17.0.0.0 network and a client requirement of at least 1000 valid subnets, which of these masks meets the client requirement while leaving the maximum number of valid host addresses per subnet?


Options are :

  • 255.255.255.192
  • 255.255.240.0
  • 255.255.224.0
  • 255.255.255.240
  • 255.255.192.0
  • 255.255.255.224

Answer :255.255.192.0

Test : CCNA Cyber Ops - SECOPS # 210-255

A client has come to you with some curious requirements for their Class A network.   He would like no more than 2000 subnets while not allowing more than 2000 users on any of those subnets.    Which mask will do the job?


Options are :

  • 255.255.252.0
  • 255.255.0.0
  • 255.255.240.0
  • 255.255.128.0
  • No mask can meet both requirements.

Answer :No mask can meet both requirements.

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