Which type of connector is commonly used for network cables?

The RJ45 connector is commonly used for network cables, particularly in Ethernet connections. It features eight pins that allow for the transmission of data over twisted pair cables, which are standard in local area networks (LANs). The design of the RJ45 connector ensures that it provides a stable and secure physical connection, essential for reliable data transmission. This connector is specifically formulated to handle the networking protocols utilized in most modern networking environments.

In contrast, options like DB9 are typically used for serial connections, USB is designed for connecting various devices like keyboards and printers, and HDMI is primarily for high-definition audio and video connections. Each of these connectors serves distinct purposes that are not related to networking cable requirements, thereby highlighting the specificity and suitability of the RJ45 for network applications.