Cisco CCNA 200-301 IPv4 Addressing and Subnetting Practice Test

Topic 06 focuses on IPv4 Addressing, Subnetting and Private Addresses for the Cisco Certified Network Associate (CCNA) certification and the 200-301 exam, using Cisco networking and Cisco IOS concepts where relevant. For broader exam preparation, review the Cisco CCNA 200-301 Exam Dumps page. Each question includes a concise explanation of the correct answer and the technical reason the other choices are incorrect.

Question 1

What is the first address in an IPv4 subnet, identifying the subnet itself rather than an individual host?

1. Network address
2. /24 IPv4 subnet
3. Host address
4. Broadcast address

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes the first address in an IPv4 subnet, identifying the subnet itself rather than an individual host.

Incorrect Answers

Answer B is incorrect because the “/24 IPv4 subnet” option describes a different concept: an IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

Answer C is incorrect because the “Host address” option describes a different concept: an IPv4 address in a subnet that can be assigned to an endpoint or interface when it is neither the network nor broadcast address.

Answer D is incorrect because the “Broadcast address” option describes a different concept: the last address in a traditional IPv4 subnet, used to reach all hosts on that subnet.

 

Question 2

Which last address in a traditional IPv4 subnet, used to reach all hosts on subnet?

1. /30 IPv4 subnet
2. Subnet mask
3. First usable IPv4 host
4. Broadcast address

Correct Answer: D

 

Correct Answer

Answer D is correct because the selected answer describes the last address in a traditional IPv4 subnet, used to reach all hosts on that subnet.

Incorrect Answers

Answer A is incorrect because the “/30 IPv4 subnet” option describes a different concept: an IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

Answer B is incorrect because the “Subnet mask” option describes a different concept: a 32-bit value that identifies which IPv4 address bits belong to the network portion and which belong to the host portion.

Answer C is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

 

Question 3

Which IPv4 address in a subnet can be assigned to an endpoint or interface when it is neither the network nor broadcast address?

1. First usable IPv4 host
2. Host address
3. /26 IPv4 subnet
4. /24 IPv4 subnet

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes an IPv4 address in a subnet that can be assigned to an endpoint or interface when it is neither the network nor broadcast address.

Incorrect Answers

Answer A is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Answer C is incorrect because the “/26 IPv4 subnet” option describes a different concept: an IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.

Answer D is incorrect because the “/24 IPv4 subnet” option describes a different concept: an IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

 

Question 4

Which 32-bit value identifies which IPv4 address bits belong to the network portion and which belong to the host portion?

1. Subnet mask
2. Network address
3. Host address
4. Prefix length

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes a 32-bit value that identifies which IPv4 address bits belong to the network portion and which belong to the host portion.

Incorrect Answers

Answer B is incorrect because the “Network address” option describes a different concept: the first address in an IPv4 subnet, identifying the subnet itself rather than an individual host.

Answer C is incorrect because the “Host address” option describes a different concept: an IPv4 address in a subnet that can be assigned to an endpoint or interface when it is neither the network nor broadcast address.

Answer D is incorrect because the “Prefix length” option describes a different concept: CIDR notation that states how many leading bits in an IP address represent the network portion.

 

Question 5

In an address written as 192.0.2.10/24, what does the number after the slash represent?

169. 169.254.0.0/16
170. Network address
171. CIDR
172. Prefix length

Correct Answer: D

 

Correct Answer

Answer D is correct because the prefix length specifies how many leading address bits form the network portion.

Incorrect Answers

Answer A is incorrect because the “169.254.0.0/16” option describes a different concept: the IPv4 link-local range often self-assigned by a host when normal address assignment is unavailable.

Answer B is incorrect because the “Network address” option describes a different concept: the first address in an IPv4 subnet, identifying the subnet itself rather than an individual host.

Answer C is incorrect because the “CIDR” option describes a different concept: Classless Inter-Domain Routing notation and allocation that uses variable-length prefixes rather than fixed classful boundaries.

 

Question 6

Which term describes classless Inter-Domain Routing notation and allocation that uses variable-length prefixes rather than fixed classful boundaries?

1. Prefix length
2. /28 IPv4 subnet
3. CIDR
4. /30 IPv4 subnet

Correct Answer: C

 

Correct Answer

Answer C is correct because Classless Inter-Domain Routing notation and allocation that uses variable-length prefixes rather than fixed classful boundaries.

Incorrect Answers

Answer A is incorrect because the “Prefix length” option describes a different concept: CIDR notation that states how many leading bits in an IP address represent the network portion.

Answer B is incorrect because the “/28 IPv4 subnet” option describes a different concept: an IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

Answer D is incorrect because the “/30 IPv4 subnet” option describes a different concept: an IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

 

Question 7

What is the RFC 1918 private IPv4 block covering addresses from 10.0.0.0 through 10.255.255.255?

10. 10.0.0.0/8
11. /27 IPv4 subnet
12. /26 IPv4 subnet
13. /25 IPv4 subnet

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes the RFC 1918 private IPv4 block covering addresses from 10.0.0.0 through 10.255.255.255.

Incorrect Answers

Answer B is incorrect because the “/27 IPv4 subnet” option describes a different concept: an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Answer C is incorrect because the “/26 IPv4 subnet” option describes a different concept: an IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.

Answer D is incorrect because the “/25 IPv4 subnet” option describes a different concept: an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

 

Question 8

What is the RFC 1918 private IPv4 block covering addresses from 172.16.0.0 through 172.31.255.255?

172. 172.16.0.0/12
173. /26 IPv4 subnet
174. /27 IPv4 subnet
175. /25 IPv4 subnet

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes the RFC 1918 private IPv4 block covering addresses from 172.16.0.0 through 172.31.255.255.

Incorrect Answers

Answer B is incorrect because the “/26 IPv4 subnet” option describes a different concept: an IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.

Answer C is incorrect because the “/27 IPv4 subnet” option describes a different concept: an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Answer D is incorrect because the “/25 IPv4 subnet” option describes a different concept: an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

 

Question 9

What is the RFC 1918 private IPv4 block covering addresses from 192.168.0.0 through 192.168.255.255?

1. /28 IPv4 subnet
2. /27 IPv4 subnet
3. 192.168.0.0/16
4. Subnet block size

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes the RFC 1918 private IPv4 block covering addresses from 192.168.0.0 through 192.168.255.255.

Incorrect Answers

Answer A is incorrect because the “/28 IPv4 subnet” option describes a different concept: an IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

Answer B is incorrect because the “/27 IPv4 subnet” option describes a different concept: an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Answer D is incorrect because the “Subnet block size” option describes a different concept: the subnet block size, or increment, is the interval between successive subnet network addresses in the relevant octet.

 

Question 10

What is the IPv4 link-local range often self-assigned by a host when normal address assignment is unavailable?

1. /28 IPv4 subnet
2. First usable IPv4 host
3. Subnet mask
4. 169.254.0.0/16

Correct Answer: D

 

Correct Answer

Answer D is correct because the selected answer describes the IPv4 link-local range often self-assigned by a host when normal address assignment is unavailable.

Incorrect Answers

Answer A is incorrect because the “/28 IPv4 subnet” option describes a different concept: an IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

Answer B is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Answer C is incorrect because the “Subnet mask” option describes a different concept: a 32-bit value that identifies which IPv4 address bits belong to the network portion and which belong to the host portion.

 

Question 11

An IPv4 subnet must provide 254 usable host addresses under the conventional network-and-broadcast reservation rules. Which listed prefix length supplies exactly this capacity?

1. /24 IPv4 subnet
2. Last usable IPv4 host
3. /29 IPv4 subnet
4. /27 IPv4 subnet

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes an IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

Incorrect Answers

Answer B is incorrect because the “Last usable IPv4 host” option describes a different concept: the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

Answer C is incorrect because the “/29 IPv4 subnet” option describes a different concept: an IPv4 /29 contains 8 total addresses and normally provides 6 usable host addresses.

Answer D is incorrect because the “/27 IPv4 subnet” option describes a different concept: an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

 

Question 12

A subnet contains 128 IPv4 addresses in total. Which prefix length defines this address block?

1. Last usable IPv4 host
2. /24 IPv4 subnet
3. /25 IPv4 subnet
4. /27 IPv4 subnet

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

Incorrect Answers

Answer A is incorrect because the “Last usable IPv4 host” option describes a different concept: the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

Answer B is incorrect because the “/24 IPv4 subnet” option describes a different concept: an IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

Answer D is incorrect because the “/27 IPv4 subnet” option describes a different concept: an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

 

Question 13

A conventional IPv4 subnet has 62 usable host addresses after reserving its network and broadcast addresses. Which prefix length is in use?

1. /26 IPv4 subnet
2. /30 IPv4 subnet
3. /25 IPv4 subnet
4. First usable IPv4 host

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes an IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.

Incorrect Answers

Answer B is incorrect because the “/30 IPv4 subnet” option describes a different concept: an IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

Answer C is incorrect because the “/25 IPv4 subnet” option describes a different concept: an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

Answer D is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

 

Question 14

An IPv4 allocation must contain exactly 32 addresses. Which listed subnet size meets this requirement?

1. /29 IPv4 subnet
2. /30 IPv4 subnet
3. /27 IPv4 subnet
4. /26 IPv4 subnet

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Incorrect Answers

Answer A is incorrect because the “/29 IPv4 subnet” option describes a different concept: an IPv4 /29 contains 8 total addresses and normally provides 6 usable host addresses.

Answer B is incorrect because the “/30 IPv4 subnet” option describes a different concept: an IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

Answer D is incorrect because the “/26 IPv4 subnet” option describes a different concept: an IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.

 

Question 15

A small LAN needs a conventional subnet with 14 usable IPv4 addresses. Which listed prefix length provides exactly that many?

1. /30 IPv4 subnet
2. /28 IPv4 subnet
3. /24 IPv4 subnet
4. /25 IPv4 subnet

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes an IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

Incorrect Answers

Answer A is incorrect because the “/30 IPv4 subnet” option describes a different concept: an IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

Answer C is incorrect because the “/24 IPv4 subnet” option describes a different concept: an IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

Answer D is incorrect because the “/25 IPv4 subnet” option describes a different concept: an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

 

Question 16

An IPv4 block contains eight addresses, of which six are usable under conventional network-and-broadcast reservation rules. Which prefix length describes it?

1. /27 IPv4 subnet
2. /26 IPv4 subnet
3. /25 IPv4 subnet
4. /29 IPv4 subnet

Correct Answer: D

 

Correct Answer

Answer D is correct because the selected answer describes an IPv4 /29 contains 8 total addresses and normally provides 6 usable host addresses.

Incorrect Answers

Answer A is incorrect because the “/27 IPv4 subnet” option describes a different concept: an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Answer B is incorrect because the “/26 IPv4 subnet” option describes a different concept: an IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.

Answer C is incorrect because the “/25 IPv4 subnet” option describes a different concept: an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

 

Question 17

A traditional IPv4 point-to-point subnet provides two usable host addresses while reserving a network and a broadcast address. Which listed prefix length supplies this four-address block?

1. /27 IPv4 subnet
2. /25 IPv4 subnet
3. Last usable IPv4 host
4. /30 IPv4 subnet

Correct Answer: D

 

Correct Answer

Answer D is correct because the selected answer describes an IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

Incorrect Answers

Answer A is incorrect because the “/27 IPv4 subnet” option describes a different concept: an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Answer B is incorrect because the “/25 IPv4 subnet” option describes a different concept: an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

Answer C is incorrect because the “Last usable IPv4 host” option describes a different concept: the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

 

Question 18

While calculating subnet boundaries, an engineer determines the interval between consecutive network addresses in the relevant octet. What is this increment called?

192. 192.168.0.0/16
193. Subnet block size
194. 172.16.0.0/12
195. /29 IPv4 subnet

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes the subnet block size, or increment, is the interval between successive subnet network addresses in the relevant octet.

Incorrect Answers

Answer A is incorrect because the “192.168.0.0/16” option describes a different concept: the RFC 1918 private IPv4 block covering addresses from 192.168.0.0 through 192.168.255.255.

Answer C is incorrect because the “172.16.0.0/12” option describes a different concept: the RFC 1918 private IPv4 block covering addresses from 172.16.0.0 through 172.31.255.255.

Answer D is incorrect because the “/29 IPv4 subnet” option describes a different concept: an IPv4 /29 contains 8 total addresses and normally provides 6 usable host addresses.

 

Question 19

What is the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address?

1. /27 IPv4 subnet
2. First usable IPv4 host
3. /25 IPv4 subnet
4. /29 IPv4 subnet

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Incorrect Answers

Answer A is incorrect because the “/27 IPv4 subnet” option describes a different concept: an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Answer C is incorrect because the “/25 IPv4 subnet” option describes a different concept: an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

Answer D is incorrect because the “/29 IPv4 subnet” option describes a different concept: an IPv4 /29 contains 8 total addresses and normally provides 6 usable host addresses.

 

Question 20

What is the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address?

1. Last usable IPv4 host
2. /27 IPv4 subnet
3. Network address
4. /29 IPv4 subnet

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

Incorrect Answers

Answer B is incorrect because the “/27 IPv4 subnet” option describes a different concept: an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Answer C is incorrect because the “Network address” option describes a different concept: the first address in an IPv4 subnet, identifying the subnet itself rather than an individual host.

Answer D is incorrect because the “/29 IPv4 subnet” option describes a different concept: an IPv4 /29 contains 8 total addresses and normally provides 6 usable host addresses.

 

Question 21

For Network address, which statement is accurate?

1. An IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.
2. An IPv4 address in a subnet that can be assigned to an endpoint or interface when it is neither the network nor broadcast address.
3. The first address in an IPv4 subnet, identifying the subnet itself rather than an individual host.
4. A 32-bit value that identifies which IPv4 address bits belong to the network portion and which belong to the host portion.

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes the first address in an IPv4 subnet, identifying the subnet itself rather than an individual host.

Incorrect Answers

Answer A is incorrect because the “/24 IPv4 subnet” option describes a different concept: an IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

Answer B is incorrect because the “Host address” option describes a different concept: an IPv4 address in a subnet that can be assigned to an endpoint or interface when it is neither the network nor broadcast address.

Answer D is incorrect because the “Subnet mask” option describes a different concept: a 32-bit value that identifies which IPv4 address bits belong to the network portion and which belong to the host portion.

 

Question 22

For Broadcast address, which statement is accurate?

1. An IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.
2. The last address in a traditional IPv4 subnet, used to reach all hosts on that subnet.
3. An IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.
4. The first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Correct Answer: B

 

Correct Answer

Answer B is correct because it accurately defines Broadcast address. The matching definition is: The last address in a traditional IPv4 subnet, used to reach all hosts on that subnet.

Incorrect Answers

Answer A is incorrect because the “/24 IPv4 subnet” option describes a different concept: an IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

Answer C is incorrect because the “/27 IPv4 subnet” option describes a different concept: an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Answer D is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

 

Question 23

For Host address, which statement is accurate?

1. The last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.
2. A 32-bit value that identifies which IPv4 address bits belong to the network portion and which belong to the host portion.
3. The first address in an IPv4 subnet, identifying the subnet itself rather than an individual host.
4. An IPv4 address in a subnet that can be assigned to an endpoint or interface when it is neither the network nor broadcast address.

Correct Answer: D

 

Correct Answer

Answer D is correct because the choice accurately describes Host address: An IPv4 address in a subnet that can be assigned to an endpoint or interface when it is neither the network nor broadcast address.

Incorrect Answers

Answer A is incorrect because the “Last usable IPv4 host” option describes a different concept: the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

Answer B is incorrect because the “Subnet mask” option describes a different concept: a 32-bit value that identifies which IPv4 address bits belong to the network portion and which belong to the host portion.

Answer C is incorrect because the “Network address” option describes a different concept: the first address in an IPv4 subnet, identifying the subnet itself rather than an individual host.

 

Question 24

For Subnet mask, which statement is accurate?

1. The first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.
2. An IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.
3. A 32-bit value that identifies which IPv4 address bits belong to the network portion and which belong to the host portion.
4. An IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes a 32-bit value that identifies which IPv4 address bits belong to the network portion and which belong to the host portion.

Incorrect Answers

Answer A is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Answer B is incorrect because the “/24 IPv4 subnet” option describes a different concept: an IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

Answer D is incorrect because the “/28 IPv4 subnet” option describes a different concept: an IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

 

Question 25

For Prefix length, which statement is accurate?

1. The IPv4 link-local range often self-assigned by a host when normal address assignment is unavailable.
2. The last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.
3. CIDR notation that states how many leading bits in an IP address represent the network portion.
4. Classless Inter-Domain Routing notation and allocation that uses variable-length prefixes rather than fixed classful boundaries.

Correct Answer: C

 

Correct Answer

Answer C is correct because it describes CIDR notation that states how many leading bits in an IP address represent the network portion.

Incorrect Answers

Answer A is incorrect because the “169.254.0.0/16” option describes a different concept: the IPv4 link-local range often self-assigned by a host when normal address assignment is unavailable.

Answer B is incorrect because the “Last usable IPv4 host” option describes a different concept: the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

Answer D is incorrect because the “CIDR” option describes a different concept: Classless Inter-Domain Routing notation and allocation that uses variable-length prefixes rather than fixed classful boundaries.

 

Question 26

For CIDR, which statement is accurate?

1. CIDR notation that states how many leading bits in an IP address represent the network portion.
2. The RFC 1918 private IPv4 block covering addresses from 172.16.0.0 through 172.31.255.255.
3. The last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.
4. Classless Inter-Domain Routing notation and allocation that uses variable-length prefixes rather than fixed classful boundaries.

Correct Answer: D

 

Correct Answer

Answer D is correct because it accurately defines CIDR. The matching definition is: Classless Inter-Domain Routing notation and allocation that uses variable-length prefixes rather than fixed classful boundaries.

Incorrect Answers

Answer A is incorrect because the “Prefix length” option describes a different concept: CIDR notation that states how many leading bits in an IP address represent the network portion.

Answer B is incorrect because the “172.16.0.0/12” option describes a different concept: the RFC 1918 private IPv4 block covering addresses from 172.16.0.0 through 172.31.255.255.

Answer C is incorrect because the “Last usable IPv4 host” option describes a different concept: the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

 

Question 27

For 10.0.0.0/8, which statement is accurate?

1. An IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.
2. The RFC 1918 private IPv4 block covering addresses from 10.0.0.0 through 10.255.255.255.
3. The RFC 1918 private IPv4 block covering addresses from 172.16.0.0 through 172.31.255.255.
4. The RFC 1918 private IPv4 block covering addresses from 192.168.0.0 through 192.168.255.255.

Correct Answer: B

 

Correct Answer

Answer B is correct because the choice accurately describes 10.0.0.0/8: The RFC 1918 private IPv4 block covering addresses from 10.0.0.0 through 10.255.255.255.

Incorrect Answers

Answer A is incorrect because the “/28 IPv4 subnet” option describes a different concept: an IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

Answer C is incorrect because the “172.16.0.0/12” option describes a different concept: the RFC 1918 private IPv4 block covering addresses from 172.16.0.0 through 172.31.255.255.

Answer D is incorrect because the “192.168.0.0/16” option describes a different concept: the RFC 1918 private IPv4 block covering addresses from 192.168.0.0 through 192.168.255.255.

 

Question 28

For 172.16.0.0/12, which statement is accurate?

172. The RFC 1918 private IPv4 block covering addresses from 172.16.0.0 through 172.31.255.255.
173. An IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.
174. The RFC 1918 private IPv4 block covering addresses from 10.0.0.0 through 10.255.255.255.
175. An IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes the RFC 1918 private IPv4 block covering addresses from 172.16.0.0 through 172.31.255.255.

Incorrect Answers

Answer B is incorrect because the “/27 IPv4 subnet” option describes a different concept: an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Answer C is incorrect because the “10.0.0.0/8” option describes a different concept: the RFC 1918 private IPv4 block covering addresses from 10.0.0.0 through 10.255.255.255.

Answer D is incorrect because the “/26 IPv4 subnet” option describes a different concept: an IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.

 

Question 29

For 192.168.0.0/16, which statement is accurate?

172. The RFC 1918 private IPv4 block covering addresses from 172.16.0.0 through 172.31.255.255.
173. The RFC 1918 private IPv4 block covering addresses from 192.168.0.0 through 192.168.255.255.
174. An IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.
175. The RFC 1918 private IPv4 block covering addresses from 10.0.0.0 through 10.255.255.255.

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes the RFC 1918 private IPv4 block covering addresses from 192.168.0.0 through 192.168.255.255.

Incorrect Answers

Answer A is incorrect because the “172.16.0.0/12” option describes a different concept: the RFC 1918 private IPv4 block covering addresses from 172.16.0.0 through 172.31.255.255.

Answer C is incorrect because the “/28 IPv4 subnet” option describes a different concept: an IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

Answer D is incorrect because the “10.0.0.0/8” option describes a different concept: the RFC 1918 private IPv4 block covering addresses from 10.0.0.0 through 10.255.255.255.

 

Question 30

For 169.254.0.0/16, which statement is accurate?

1. The IPv4 link-local range often self-assigned by a host when normal address assignment is unavailable.
2. An IPv4 address in a subnet that can be assigned to an endpoint or interface when it is neither the network nor broadcast address.
3. An IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.
4. The first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Correct Answer: A

 

Correct Answer

Answer A is correct because it accurately defines 169.254.0.0/16. The matching definition is: The IPv4 link-local range often self-assigned by a host when normal address assignment is unavailable.

Incorrect Answers

Answer B is incorrect because the “Host address” option describes a different concept: an IPv4 address in a subnet that can be assigned to an endpoint or interface when it is neither the network nor broadcast address.

Answer C is incorrect because the “/24 IPv4 subnet” option describes a different concept: an IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

Answer D is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

 

Question 31

For /24 IPv4 subnet, which statement is accurate?

1. The last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.
2. The first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.
3. An IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.
4. An IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.

Correct Answer: C

 

Correct Answer

Answer C is correct because the choice accurately describes /24 IPv4 subnet: An IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

Incorrect Answers

Answer A is incorrect because the “Last usable IPv4 host” option describes a different concept: the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

Answer B is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Answer D is incorrect because the “/26 IPv4 subnet” option describes a different concept: an IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.

 

Question 32

For /25 IPv4 subnet, which statement is accurate?

1. The last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.
2. An IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.
3. An IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.
4. An IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

Incorrect Answers

Answer A is incorrect because the “Last usable IPv4 host” option describes a different concept: the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

Answer C is incorrect because the “/28 IPv4 subnet” option describes a different concept: an IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

Answer D is incorrect because the “/24 IPv4 subnet” option describes a different concept: an IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

 

Question 33

For /26 IPv4 subnet, which statement is accurate?

1. The first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.
2. An IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.
3. An IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.
4. An IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

Correct Answer: B

 

Correct Answer

Answer B is correct because the selected answer describes an IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.

Incorrect Answers

Answer A is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Answer C is incorrect because the “/30 IPv4 subnet” option describes a different concept: an IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

Answer D is incorrect because the “/25 IPv4 subnet” option describes a different concept: an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

 

Question 34

For /27 IPv4 subnet, which statement is accurate?

1. The first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.
2. The last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.
3. An IPv4 /29 contains 8 total addresses and normally provides 6 usable host addresses.
4. An IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Correct Answer: D

 

Correct Answer

Answer D is correct because it accurately defines /27 IPv4 subnet. The matching definition is: An IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Incorrect Answers

Answer A is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Answer B is incorrect because the “Last usable IPv4 host” option describes a different concept: the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

Answer C is incorrect because the “/29 IPv4 subnet” option describes a different concept: an IPv4 /29 contains 8 total addresses and normally provides 6 usable host addresses.

 

Question 35

For /28 IPv4 subnet, which statement is accurate?

1. The first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.
2. An IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.
3. The last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.
4. An IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

Correct Answer: D

 

Correct Answer

Answer D is correct because the choice accurately describes /28 IPv4 subnet: An IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

Incorrect Answers

Answer A is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Answer B is incorrect because the “/30 IPv4 subnet” option describes a different concept: an IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

Answer C is incorrect because the “Last usable IPv4 host” option describes a different concept: the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

 

Question 36

For /29 IPv4 subnet, which statement is accurate?

1. An IPv4 /29 contains 8 total addresses and normally provides 6 usable host addresses.
2. An IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.
3. An IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.
4. The last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

Correct Answer: A

 

Correct Answer

Answer A is correct because the selected answer describes an IPv4 /29 contains 8 total addresses and normally provides 6 usable host addresses.

Incorrect Answers

Answer B is incorrect because the “/30 IPv4 subnet” option describes a different concept: an IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

Answer C is incorrect because the “/25 IPv4 subnet” option describes a different concept: an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

Answer D is incorrect because the “Last usable IPv4 host” option describes a different concept: the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

 

Question 37

For /30 IPv4 subnet, which statement is accurate?

1. The first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.
2. An IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.
3. An IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.
4. An IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

Correct Answer: D

 

Correct Answer

Answer D is correct because the selected answer describes an IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

Incorrect Answers

Answer A is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Answer B is incorrect because the “/27 IPv4 subnet” option describes a different concept: an IPv4 /27 contains 32 total addresses and normally provides 30 usable host addresses.

Answer C is incorrect because the “/25 IPv4 subnet” option describes a different concept: an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

 

Question 38

For Subnet block size, which statement is accurate?

1. An IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.
2. An IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.
3. The subnet block size, or increment, is the interval between successive subnet network addresses in the relevant octet.
4. An IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

Correct Answer: C

 

Correct Answer

Answer C is correct because it accurately defines Subnet block size. The matching definition is: The subnet block size, or increment, is the interval between successive subnet network addresses in the relevant octet.

Incorrect Answers

Answer A is incorrect because the “/28 IPv4 subnet” option describes a different concept: an IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

Answer B is incorrect because the “/25 IPv4 subnet” option describes a different concept: an IPv4 /25 contains 128 total addresses and normally provides 126 usable host addresses.

Answer D is incorrect because the “/30 IPv4 subnet” option describes a different concept: an IPv4 /30 contains 4 total addresses and normally provides 2 usable host addresses.

 

Question 39

For First usable IPv4 host, which statement is accurate?

1. An IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.
2. The first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.
3. An IPv4 /29 contains 8 total addresses and normally provides 6 usable host addresses.
4. An IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

Correct Answer: B

 

Correct Answer

Answer B is correct because the choice accurately describes First usable IPv4 host: The first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Incorrect Answers

Answer A is incorrect because the “/26 IPv4 subnet” option describes a different concept: an IPv4 /26 contains 64 total addresses and normally provides 62 usable host addresses.

Answer C is incorrect because the “/29 IPv4 subnet” option describes a different concept: an IPv4 /29 contains 8 total addresses and normally provides 6 usable host addresses.

Answer D is incorrect because the “/24 IPv4 subnet” option describes a different concept: an IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

 

Question 40

For Last usable IPv4 host, which statement is accurate?

1. An IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.
2. An IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.
3. The last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.
4. The first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.

Correct Answer: C

 

Correct Answer

Answer C is correct because the selected answer describes the last usable host address in a traditional IPv4 subnet is normally one address lower than the subnet broadcast address.

Incorrect Answers

Answer A is incorrect because the “/24 IPv4 subnet” option describes a different concept: an IPv4 /24 contains 256 total addresses and normally provides 254 usable host addresses because the network and broadcast addresses are reserved.

Answer B is incorrect because the “/28 IPv4 subnet” option describes a different concept: an IPv4 /28 contains 16 total addresses and normally provides 14 usable host addresses.

Answer D is incorrect because the “First usable IPv4 host” option describes a different concept: the first usable host address in a traditional IPv4 subnet is normally one address higher than the subnet network address.