An IT network engineer designs the computer networks that organizations rely on to access, share, and store information. Network engineers implement and maintain local area networks (LAN), wide area networks (WAN), the corporate intranet and Internet connections, and the virtual private network (VPN). The complexity of the work depends on the organization

A computer network or data network is a telecommunications network which allows nodes to share resources. In computer networks, networked computing devices exchange data with each other using a data link. The connections between nodes are established using either cable media or wireless media.