In this work we use the available technology of DHCP for the interconnection of the devices of each area of the company, we have IP addresses, and VLAN creations for the realization of this. Due to the requirement of the CAR-CARE company, we will focus on the security part because a company should not lose information and its performance must be excellent for proper operation. The company CAR-CARE lacked security and the proper functioning of the same because they only used a network for all the information that was being handled. For this we designed a network that has VLANS for each area of the company and DHCP addressing for the equipment. In this we use a star topology, which is more useful to develop this type of requirements, we use CISCO switches, for the creation of the IP's we use subnetting and thus be clear which network we will use for the interconnection of the areas. A VLANS separating each area and thus provide them with greater speed in data transfer and a dedicated network for people outside the company. At the end of the creation of this project we saw a significant improvement of more than 50% in the speed of file transfer and in the security of these, as well as improving the effectiveness and performance of the company's employees.