Question 1:

An ISP is granted the block 154.27.10.0/20. The ISP needs to distribute these addresses to two groups of customers as follows:

a) The first group has 64 customers; each needs 32 addresses

b) The second group has 32 customers; each needs 256 addresses .

Design the subblocks?

Question 2:

In a block of addresses, we know the IP address of one host is 112.38.57.14 and the Mask is .255.255.240.0

a) Give the slash notation of the Mask

b) What is the first address ?

c) What is the last address in this block?

Question 3:

Give the mask in slash notation (CIDR) if the number of addresses is 256?