Danilo Amorim

Here it is because of the name to be binary system. So that you understand on the conversion process binary-decimal well, is in the table above, then it memorizes it. an Address of IPv4 consists of 32 bits of information (32 binary digits – ‘ ‘ 0 and 1’ ‘). These bits are divided in four quadrants, called octets or bytes, each one I contend 8 bits.

The address of 32 bits is structuralized of hierarchic form, in opposition to a form plain, or not-hierarchic. Although both the projects could be adopted, the hierarchic project was chosen by a reason: better performance in the roteamento. Although the project ‘ ‘ plano’ ‘ in disponibilize a well bigger interval of possible addresses (2 = 4,3 billion), if each address was only, all the roteadores in the Internet would have that to store the address of each one of the connected devices it. This would become impossible a process of efficient roteamento, exactly that only one fraction addresses came them to be, effectively, used. The solution for this problem was the adoption of a project of addressing of three levels (hierarchy), divided in: REDE.SUBNET.HOST. This project of addressing can be compared with a project of traditional telephonic addressing: the first part (NET) identifies a great area, second (SUBNET) already she is more specific and it defines the call area, and, finally, it finishes it part – the suffix – (HOST) it identifies the number of the customer in the net. The net address (network address) identifies each net distinct. All and any machine in a net divides net address the same as part of its address IP.

In address IP, for example, part 172,16 identifies to the net, being portante the o its address, the address of knot (node address) 30,56, individually identifies each device connected in the net, in opposition to the net address, that identifies in group. The designers of the Internet, had decided for creating classrooms of nets based on the size of them. For a small hardwired device number the classroom of nets was created (class networks). In the other extremity, we have classroom C, that it possesss a great number of nets and a small device number hardwired to each one. Classroom B, would be a half term enters the classroom and classroom C. 8bits8bits8bits8bitsIntervaloExemplo Classroom ANETHOSTHOSTHOST0-1271.2.3.4 Classroom BNETNETHOSTHOST128-191130.10.100.45 Classroom CNETNETNETHOST192-223192.168.1.2 the subdivision of an address IP in the portions of net and knot is determined by the classroom where if it finds such address. The tablea above, identifies only the 3 more used classrooms. Good, we go being here for the time being, therefore the time is short. In the next postagem I will teach as to determine the Intervals of Nets.

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