Question

Suppose a company received the IP network: 221.163.175.0/16. You want to set up the company’s network to limit the number of hosts on each subnet to approximately 60

a. What class of address is this?

b. How many subnets are possible?

c. How many bits must be borrowed from the host bits to be used for subnet ID?  

d, What is the subnet mask?

e. How many possible hosts could be on each subnet, assuming the first and last addresses cannot be assigned?

f. What are the address ranges for each subnet?

Answer 1

IP Addresses are devided into different class forms.

a) IP Network 221.163.175.0/16 range is coming under CLASS C (192.0.1.1 to 223.255.254.254)

b) Total 162 subnets are possible including all the mask network

c) for class C , default subnet mask we can consider is 255.255.255.0 which shows 24 bits for network portion and 8 bits for host portion

d) The numbers which are used to define IP address are called subnet mask

e) for class c network 255.255.255.0, we can consider no of subnets = 2ⁿ = 2¹² = 4096. So we can say that for each subnet, minimum host bits should be 2. So in the equation we can write as 4096 - 2 = 4094 possible host could be on each subnet

f) The address range could be divided below

Class A - 1.0.0.1 to 126.255.255.254

Class B - 128.1.0.1 to 191.255.255.254

Class C - 192.0.1.1 to 223.255.255.254

Class D - 224.0.0.0 to 239.255.255.255