0.0, SO THE FIRST TWO OCTETS ARE FOR THE NETWORK IDS, FOR A TO...

255.255.0.0, so the first two octets are for the network IDs, for a total of 16,384, and thelast two are for the hosts. So, class B networks have 2

¹⁶

– 2 hosts, or 65,534. Class C net-works have more networks but are smaller, with 2

⁸

– 2 hosts, or 254.We could implement our network now very simply. Determine the number of hostsand the number of networks, and pick the class that fits. If you do not wish to assign apublic IP address to all your machines, there is another solution.There are three banks of IPaddresses that are called private IP addressranges.They are listed in Table 3.4.Typically, a net-work will need only one or two public addresses for the Internet interfaces, and everythinginternal to the company can use the private IP addresses internally.

Table 3.4

Private IP AddressesNetwork ID Subnet Mask Range