IP addresses consist of numbers that are 32 bits long (in binary), have 4 octets (bits of 8) and use the decimal dot notation. IP addresses are comprised of two components: the network ID and the host ID. For example: In a class C network: 192.168.10.128
Network ID Host ID
(16-bit block) (8-bit block)
DNS (domain name system) is used with IP addresses. DNS converts domain names and websites to IP addresses, which a computer can read. The computer remembers the IP address so that the user doesn’t have to. DNS also aids in and controls the delivery of email. IP addresses are either classful or classless networks. Classful IP addresses are divided into different classes with a field for the network ID and a field for the host ID. There is a different length for each ID for each different class. A certain number of bits are in the network ID and the remaining are in the host ID. Each network class has a different number of leading bits, bits for the network number, and number of networks, bits for host number and maximum nodes or devices that can be used on each network. There are five different classes and are as follows: Network Class
| Leading Bits
| Bits for Network #
| Number of Networks
| Bits for Host Number
| Maximum hosts
| Class A
Class E (reserved)
In classful IP addressing, the network ID portion can take only the predefined number of bits 8, 16, or 24. In classless addressing, any number of bits can be assigned to the network ID. So in this case I think it is best to use classful IP addresses. Also to cut back on cost I believe it best to use a Class C network and subnet.
For a company that has 145 hosts (computers and printers) and needs up to 50% growth (73 more devices) in the next two years, we can start with one IP...
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