01
Choose one
1 point
Which dotted-decimal subnet mask corresponds to the CIDR prefix /25?
Free Practice Quiz Question List
1 IPv4 Addresses, Subnet Masks, and CIDR Online Quiz Questions
Use this free practice quiz with 20 questions to review 1 IPv4 Addresses, Subnet Masks, and CIDR, test your knowledge, and prepare for your next test or exam.
20 questions
02
True or false
1 point
True or false: /0 is a valid CIDR prefix length.
- A
True
- B
False
03
Fill in the blank
1 point
Complete the mask for a /29 prefix: 255.255.255..
04
Written response
1 point
What CIDR prefix length corresponds to the mask 255.255.255.248? Enter the prefix length as an integer, without a slash.
05
Choose one
1 point
For the address 10.4.0.0/16, what does the number 16 specify?
- A
It identifies how many octets the address contains.
- B
It specifies how many bits remain for host addresses.
- C
It states how many leading bits are in the network prefix.
- D
It indicates the historical class of the address.
06
Choose all
1 point
Select all correct statements about the structure of a standard dotted-decimal IPv4 address.
- A
An IPv4 address contains 32 bits divided into four octets.
- B
Each octet is written as a decimal value from 0 to 255.
- C
Periods separate the four octets.
- D
Each octet contains 16 bits.
07
Fill in the blank
1 point
The decimal value of the subnet-mask octet 11111100 is .
08
True or false
1 point
True or false: A /24 prefix leaves 8 bits for addresses within the prefix.
- A
True
- B
False
09
Choose one
1 point
Which dotted-decimal subnet mask corresponds to /21?
- A
255.255.240.0
- B
255.255.255.0
- C
255.255.248.0
- D
255.255.252.0
10
Choose all
1 point
For a /28 prefix, select all correct statements about its mask and remaining bits.
- A
The dotted-decimal mask is 255.255.255.240.
- B
The final octet contains four 1 bits.
- C
Four bits remain for addresses within the prefix.
- D
The dotted-decimal mask is 255.255.255.248.
- E
The prefix length is /27.
11
Written response
1 point
What CIDR prefix length corresponds to 255.255.248.0? Enter the prefix length as an integer, without a slash.
12
Open ended
1 point
Convert /20 to a dotted-decimal subnet mask. Give the mask and explain how the 20 prefix bits determine each octet.
13
Choose one
1 point
Which dotted-decimal subnet mask corresponds to /19?
- A
255.255.192.0
- B
255.255.224.0
- C
255.255.240.0
- D
255.255.255.0
14
True or false
1 point
True or false: A /32 prefix leaves zero bits for addresses within the prefix.
- A
True
- B
False
15
Written response
1 point
What is the name for one 8-bit group in an IPv4 address?
16
Choose one
1 point
Which CIDR prefix length is outside the valid range for an IPv4 address?
- A
/0
- B
/33
- C
/24
- D
/32
17
Choose one
1 point
Which dotted-decimal value is not a valid IPv4 address because one of its octets is out of range?
- A
192.168.1.70
- B
10.0.0.255
- C
192.168.1.256
- D
172.16.0.1
18
Written response
1 point
For a /20 prefix, how many complete 8-bit octets are filled with network-prefix bits?
19
Choose one
1 point
What dotted-decimal subnet mask corresponds to the CIDR prefix /13?
- A
255.0.0.0
- B
255.255.0.0
- C
255.248.0.0
- D
255.255.248.0
20
Choose one
1 point
What CIDR prefix length corresponds to the contiguous subnet mask 255.255.255.240?
- A
/24
- B
/26
- C
/28
- D
/30
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