An IP address is a serie of 4 numbers separate by dots and less than 256 :

300.124.1.2 This is wrong

125.124.1.2 this is good

There are two different types Public and Private (a router has a private and a public IP Address)

·         Private:   10.x.x.x   192.168.x.x  and  172.16.x.x but the last one is not comun.

·         Public: Every computer has a different one and people can see yours in the internet.

·         Static: Is manually configured by the ISP(orange, Ono, Yoigo…)

·         Dynamic: Is automatic configured

How to change the IP of a computer?

NIC IP Configuration:

1.    IP Address  10.0.72.10

2.    Network Mask:  255.255.255.0 (normalmente suele ser con tres veces 255, el tercero marca la cantidad de ordenadores que están conectados)

3.    Gateway: “IP of the router”

4.    DNS:-Dinamic  -Name  -Server  Is theIP Address of a machine (Sin DNS no hay internet, son IPs públicas)