1: What is the IP address 127.0.0.1 used for? Why is it useful for technicians and administrators?

2: You have been given a network 192.168.0.0 255.255.0.0. You wish to divide this into subnetworks so that each subnetwork has a different number in the third octet (192.168.1.0, 192.168.2.0, 192.168.3.0, and so on). What subnet mask will you use to accomplish this?

3: What are the CIDR notations for each of the following subnet masks?

255.0.0.0 255.255.0.0 255.255.255.0

4: List the private IP address ranges for each of the following:

Class A private address range: Class B private address range: Class C private address range: