Chapter 8 - Subnet Masks and CIDRs - Sheet1

Question 1

What are the CIDR values for a Class C network

Answer 1

/24 - /30

Question 1

Subnet mask for /29

Answer 1

255.255.255.248

Question 2

Subnet mask for /10

Answer 2

255.192.0.0

Question 2

Subnet mask for /30

Answer 2

255.255.255.252

Question 3

What are the CIDR values for a class a network

Answer 3

/8 - /15

Question 3

Subnet mask for /18

Answer 3

255.255.192.0

Question 4

Subnet mask for /22

Answer 4

255.255.252.0

Question 6

Subnet mask for /9

Answer 6

255.128.0.0

Question 6

Subnet mask for /15

Answer 6

255.254.0.0

Question 8

Subnet mask for /12

Answer 8

255.240.0.0

Question 8

Subnet mask for /26

Answer 8

255.255.255.192

Question 9

Subnet mask for /21

Answer 9

255.255.248.0

Question 10

Subnet mask for /25

Answer 10

255.255.255.128

Question 12

Subnet mask for /8

Answer 12

255.0.0.0

Question 12

Subnet mask for /27

Answer 12

255.255.255.224

Question 13

Subnet mask for /23

Answer 13

255.255.254.0

Question 15

Subnet mask for /13

Answer 15

255.248.0.0

Question 17

Subnet mask for /17

Answer 17

255.255.128.0

Question 19

What are the CIDR values for a Class B network

Answer 19

/16 - /23

Question 20

Subnet mask for /28

Answer 20

255.255.255.240

Question 21

Subnet mask for /20

Answer 21

255.255.240.0

Question 22

Subnet mask for /24

Answer 22

255.255.255.0

Question 23

Subnet mask for /16

Answer 23

255.255.0.0

Question 24

Subnet mask for /11

Answer 24

255.224.0.0

Question 25

Subnet mask for /19

Answer 25

255.255.224.0

Question 26

Subnet mask for /14

Answer 26

255.252.0.0

Question 27

Name the 3 common CIDRs and their subnets

Answer 27

/8 255.0.0.0

/16 255.255.0.0

/24 255.255.255.0