When two networks share the same switch, there is a risk of data leakage or unauthorized access between networks. Switches operate at the data link layer (Layer 2) of the OSI model, examining incoming data packets and forwarding them to the intended recipient. Switches can be broadly. In my organization, we have 2 networks. A network for staff and another network for public Wi-Fi. For DNS I got a solution which works via search domains. The Issue now: What happens if network C or later network D needs to be. Where two directly connected PCs in different ip networks are able to ping each other if their network interfaces have their own ip address set as a gateway address too. Scenario 2 Where two or more Cisco switches are connected to a single common switch, each has a VLAN interface configured with a. Is it possible to do it, means sending 2 datas, TCP/IP and Internet on the same Ethernet networking via fiber optic and connect each RJ45 to his destination device. Are they really 2 different network.