This wiring diagram illustrates the configuration for a straight-through CAT5 cable used to connect a PC to a network. CAT5 cables are commonly used for Ethernet networking and can be wired in two different configurations: straight-through and cross-over. In this setup, the straight-through cable is used to connect a PC to a network switch or router. The wiring arrangement of the CAT5 cable ensures that the transmit (TX) pins of the PC are connected to the receive (RX) pins of the network device, and vice versa. This allows for proper communication between the PC and the network, enabling data transfer and network connectivity.