Subnet Class Table

Question 1

First octet 1 - 126
Subnet mask 255.0.0.0
Number of hosts 256256256-2 = 16,777,214

Answer 1

Class A

Question 2

First octet 128 - 191
Subnet mask 255.255.0.0
Number of hosts 256*256-2 = 65,534

Answer 2

Class B

Question 3

First octet 192 - 223
Subnet mask 255.255.255.0
Number of hosts 256-2 = 254

Answer 3

Class C

Question 4

First octet 224 - 239

Reserved for multicast addressing

Answer 4

Class D

Question 5

First octet 240-255

Reserved for government and experiments

Answer 5

Class E