Tech moves fast! Stay ahead of the curve with Techopedia!
Join nearly 200,000 subscribers who receive actionable tech insights from Techopedia.
A loopback plug is a device used to test ports (such as serial, parallel USB and network ports) to identify network and network interface card (NIC) issues. Loopback plug equipment facilitates the testing of simple networking issues and is available at very low costs. A loopback plug device is classified as male or female.
A loopback plug is also known as a loopback adapter or loopback cable.
A loopback plug is a 10-inch wire device with a small plastic connector at one end that isolates network circuit issues and is made with RJ-45 connectors, a crimping device and unshielded twisted pair (UTP) cables.
Generally, outgoing data signals are redirected to the system, which ensures system data transmission capability. As data is looped, the system recognizes output data as input data.
Loopback plugs are generally used to route electronic signals and digital data streams from the source back to the same origin to test data transmission. Telecommunications, serial interfaces, virtual network interfaces and networking all implement loopback techniques.
Loopback techniques include: