BNC T-connectors (used with the 10Base-2 system) are female devices for connecting two cables to a network interface card (NIC). A BNC barrel connector allows connecting two cables together.

BNC connectors can also be used to connect some monitors, which increases the accuracy of the signals sent from the video adapter.

Linux Ethernet how to page
Provides information on creating a network using coaxial or twisted-pair cables, with links to cable information and a FAQ.