Problem
1. Find the subnet mask in each case:
a. 1024 subnets in class A
b. 256 subnets in class B
c. 32 subnets in class C
d. 4 subnets in class C
2. In a block of addresses, we know the IP address of one host is 25.34.12.56/16. What is the first address (network address) and the last address (limited broadcast address) in this block?